Write, draw, show, and tell: a child-centred dual methodology to explore perceptions of out-of-school physical activity

Background Research to increase children’s physical activity and inform intervention design has, to date, largely underrepresented children’s voices. Further, research has been limited to singular qualitative methods that overlook children’s varied linguistic ability and interaction preference. The aim of this study was to use a novel combination of qualitative techniques to explore children’s current views, experiences and perceptions of out-of-school physical activity as well as offering formative opinion about future intervention design. Methods Write, draw, show and tell (WDST) groups were conducted with 35 children aged 10–11 years from 7 primary schools. Data were analysed through a deductive and inductive process, firstly using the Youth Physical Activity Promotion Model as a thematic framework, and then inductively to enable emergent themes to be further explored. Pen profiles were constructed representing key emergent themes. Results The WDST combination of qualitative techniques generated complimentary interconnected data which both confirmed and uncovered new insights into factors relevant to children’s out-of-school physical activity. Physical activity was most frequently associated with organised sports. Fun, enjoyment, competence, and physical activity provision were all important predictors of children’s out-of-school physical activity. Paradoxically, parents served as both significant enablers (i.e. encouragement) and barriers (i.e. restricting participation) to physical activity participation. Some of these key findings would have otherwise remained hidden when compared to more traditional singular methods based approaches. Conclusions Parents are in a unique position to promote health promoting behaviours serving as role models, physical activity gatekeepers and choice architects. Given the strong socialising effect parents have on children’s physical activity, family-based physical activity intervention may offer a promising alternative compared to traditional school-based approaches. Parents' qualitative input is important to supplement children’s voices and inform future family-based intervention design. The WDST method developed here is an inclusive, interactive and child-centred methodology which facilitates the exploration of a wide range of topics and enhances data credibility.


Background
Regular physical activity is associated with wideranging health benefits for children [1,2] and averts the onset of a range of non-communicable diseases, including obesity, type II diabetes and cardiovascular disease [3,4]. Despite these well-established health outcomes few UK children currently achieve the recommended levels of physical activity to benefit their health (60 daily minutes of moderate to vigorous intensity physical activity; MVPA) [5]. Physical activity promotion is therefore essential within childhood with physical activity levels in childhood influencing lifestyle choices in adulthood and active children tend to be active adults [6][7][8].
Theoretical models are used as a framework to understand factors that enable or restrict physical activity [9]. These multiple influences are presented in the Youth Physical Activity Promotion Model (YPAPM; Fig. 1) [10], a socio-ecological model based on the fundamental principles of the PRECEDE-PROCEED model [11]. The model's socio-ecological approach embraces an appreciation for community-level influences including the social and built environment and thus provides an appropriate conceptual framework for informing the design of intervention strategies that target changes beyond the level of the individual [9].
To date physical activity promotion strategies for young people have mainly been school-based targeting physical activity behaviours throughout the school day, yet few have reported positive health effects [12][13][14]. The out-of-school period (i.e., specifically after school and weekend) may offer a promising alternative during which to intervene given the precipitous decline in physical activity levels during these periods [15][16][17]. Moreover, the out-of-school period offers added opportunities for family based physical activity, and with parents being among the strongest influences on children's physical activity [18,19], serving as physical activity 'gate keepers' , role models, and sources of support [20][21][22], there is potential for parents to act as catalysts to increase children's out-of-school physical activity. Parents also govern the home environment and as such are in a key position to promote other behaviours that are conductive to children's health [23,24]. For example, children living in home environments that offer less support for screen time (i.e., no media equipment in children's bedrooms and greater restricting rules), have been shown to spend significantly less time sedentary [25][26][27].
Ecological models postulate that health behaviours are shaped by the setting in which they occur [9,10]. Neighbourhood environmental factors such as physical activity provision [28], proximity [29,30], traffic volume, and neighbourhood safety [31] are considered to be important influences on children's physical activity. Such factors are likely to influence parental perceptions of the environment and consequently the level of autonomy children are afforded by parents to be active outdoors and independent of adult supervision [32,33]. Although time spent outdoors is consistently associated with higher daily physical activity in children [34,35], parents often limit children's levels of outdoor play in response to concerns about safety (i.e., road safety and 'stranger danger') Fig. 1 Conceptual diagram of the YPAPM (Welk, 1999) [31,36], even when children report positive perceptions of the local neighbourhood [37]. Restricting children to the home environment has been linked with lower levels of active transport and MVPA in Australian children [38] and more recently, greater levels of sedentary time in UK children [39].
Whilst quantitative approaches report physical activity prevalence and identify associations (e.g., [20,32]), they provide limited contextual understanding or explanation as to why some children are more active than others, and offer little insight into intervention design. Engaging the intended user groups (i.e., children and parents) within design, eliciting their perspectives on physical activity and content is central to a phased approach to complex intervention design, and is deemed essential to their success [40,41]. There remains however, a dearth of literature featuring the 'children's voice' with qualitative research exploring children's physical activity largely based upon data generated from parent led focus groups [42,43] and interviews [22,44]. Moreover, formative physical activity child intervention studies generally proceed with the informed view of what parents consider children need rather than adopting a humanistic childled approach [45][46][47].
Humanism is a 'holistic' approach that emphasises the study of the whole child, through the eyes of the child, rather than the eyes of parents or researcher. The approach encourages children to think about their own personal feelings, and how they perceive and interpret experiences thereby offering a unique child-centred insight into the factors that drive children's behaviour [48]. Child-led focus groups are humanistic and acknowledge children as experts [49]. They have been used before to explore children's perspectives and attitudes towards physical activity [50,51]. However, because children differ in cognitive and linguistic ability, interaction preference, and experience similar events in rather different ways, a more developmentally appropriate and creative methodology than focus groups may be needed [52,53].
Participatory visual methods such as write and draw and its variations are highly efficient and ethically compliant research methods that are particularly suited for research with children for reasons of inclusivity and interactivity [54,55]. Write and draw is popular in childfocused health research [56][57][58] and has been used recently to explore children's physical activity beliefs [59] and playground experiences [60]. When compared to other qualitative approaches, drawing provides children with greater control over their expression, allowing them to reflect upon and articulate what is important to them, and the drawings themselves are rich visual illustrations that directly represent children's perspectives and/or experiences [61,62]. To date, research employing write and draw has somewhat focussed on drawing as representation with an emphasis on the tangible outcome, using the marks made on paper (i.e., drawing alone) or a combination of drawing and labelling as a source of data [60 58]. Such representations may not, however, be an accurate reflection of children's intended meaning, as the interpretation of the drawing is researcher dependent and may therefore influence study credibility [63,64].
WDST is a new method that represents an evolution of the write and draw and focus group method. The current study introduces WDST and provides a conceptual framework and practical checklist for its future application (Table 1). Contrary to that of traditional write and draw approaches, children are encouraged to articulate their own meaning embedded within their drawing

Analysis
• Triangulate and pool all three data streams • Content analysis of themes • Present visual representation of drawing combined with narrative • Pen profile analysis and thus individual narrative commentary is formed (i.e., drawing as meaning-making) [65,66]. Aside from providing children with greater control over their expression and recognising the social context in children's drawing [67,68], considering both representations together provides a more comprehensive and credible account of children's perceptions and experiences in both an empowering and personally relevant manner [55,69]. As a whole, the WDST method provides children with alternative ways of expression and enables a deeper exploration of children's thoughts and perceptions by not limiting children to verbal communication. It was envisioned that the interactive and dual methods based approach (i.e., WDST) would foster greater inclusivity and would elicit more representative and detailed perceptions on out-ofschool physical activity that perhaps would remain uncovered when using traditional singular methods based approaches including focus groups [65,[70][71][72].
Research to increase physical activity in children and inform intervention design has, to date, largely underrepresented children's voices [45][46][47] and been limited to singular qualitative methods that overlook children's varied linguistic ability and interaction preference [73,74]. An exception to this however is a recent Australian study [24] that employed a range of methods including a family interview, home tour and direct observation to explore children's and parents' perceptions of home physical environmental influences on children's physical activity and sedentary time. Interviews may, however, have been prone to social desirability given that interviews were conducted in the presence of parents [75,76]. A more detailed understanding of UK children's perceptions of context specific physical activity, the participation barriers they face, as well as factors that support them to lead a physically active lifestyle may inform future physical activity promotion strategies including intervention design aimed at low active UK children. The aim of this study is to therefore use a combination of qualitative techniques to explore children's current views, experiences and perceptions of out-of-school physical activity as well as offering formative opinion about future intervention design. It is envisaged that the contextual information gathered from this study will a) provide valuable insights into the meanings children ascribe towards physical activity, and b) inform the design of future out-of-school physical activity promotion strategies targeting primary school aged children.

Participants
Participants in this study were schoolchildren aged 10-11 years from a large north-west England city. Seven primary schools spanning a range of socio-economic areas were approached as convenience samples and agreed to participate in the study. Eligible participants had taken part in a previous cross-sectional study assessing physical activity levels [77]. Following gatekeeper consent, information packs containing child and parent information sheets and consent forms were distributed to all eligible child participants (N = 181) at schools to take home to parents. For the purpose of this formative study five consenting children from each school were randomly selected via lottery method to take part in a WDST group. Written informed consent and assent were obtained for 63 children (34.8 % response rate), and 35 (16 boys) of them took part in the WDST groups. Ethical approval for this study was granted by Liverpool John Moores University Ethics Committee (ref 14/SPS/033).

Procedures
Write, draw, show and tell groups WDST groups were arranged and conducted by the first author. Semi structured WDST group guides were used to ensure consistency across WDST groups, and questions were informed by the YPAPM [10]. Example WDST group questions aligned to categories of the YPAPM [10] are presented in Table 2. These questions demonstrated aspects of face validity. The research team have extensive experience working with children and conducting research on topics similar to that explored in the current study [51,60,[78][79][80][81]. The focus group guides used in the aforementioned studies were used to inform the structure and content of the WDST guide. Prior to data collection the WDST guide was assessed independently by each of the authors after which a group meeting took place involving all authors. The WDST guide was discussed among the authors and a collective consensus was reached that the phrasing of the WDST questions and activities were age appropriate and would allow for the study aims to be achieved. One question was revised in order to improve clarity. ''Can you think of anything that stops you from playing outdoors" was revised to ''Can you think of anything that stops you from playing outdoors by your home as opposed to playing indoors?" The last author, an expert in the field as a Chartered Psychologist, provided feedback as regards age appropriateness.
A range of qualitative techniques referred to here as WDST were incorporated into WDST groups to further stimulate children's thinking and facilitate discussion around physical activity [82,83] (refer to Table 1). The WDST group started with less challenging tasks and questions that children could answer as experts such as their favourite physical activities. An ice breaker task was used at the beginning of each WDST group to provide children the opportunity to experience talking aloud to the group, and to establish an environment in which sharing and listening was valued [53]. Children were provided with post-it note© paper and a pencil and asked to write down '5 words to best describe physical activity to someone else'. Children subsequently placed their responses on to a flip chart board and before doing so provided a verbal explanation of the meaning behind their written responses. To allow children to express their perceptions of physical activity visually, we invited children to independently (i.e., not completed in conjunction with peers) draw an environment where they were most likely to participate in physical activity. The drawing took the focus away from direct questioning and consensus, to that of a more child-centred approach that better allowed for the lived experience to be shared [56]. Throughout the write and draw activity the first author separately engaged children in informal conversations for them to articulate what they were drawing and why.
''And what about you Joe? Can you tell me what's going on in your picture?" With the exception of providing children with motivational comments to continue/complete as appropriate, the first author refrained from providing any evaluation of the children's drawings. The write and draw activity provided children with greater control over their expression, allowing them to reflect upon and articulate what is important to them, and the drawings themselves are rich visual illustrations that directly represented children's perspectives and/or experiences [61,62]. Following the completion of the write and draw activity the WDST group proceeded with more challenging openended questioning around out-of-school physical activity and outdoor play. In the view that children enjoy and are satisfied most when speaking about their own personal interests and experiences the researcher provided children with various opportunities to speak about their individual physical activity interests and experiences and were encouraged to talk about themselves [84].
Can you tell me what sorts of physical activities you most like taking part in outside of school? What is it that you like most about this activity compared to other activities? 'Over the past week what sorts of physical activities have you done outside of school?
Can you tell me where you did the activity and who it was with?
It was anticipated that by providing children with multiple ways of expressing, 'in their own words' , their personal perceptions and experiences it would place them at greater ease, and their increased comfort when expressing themselves would provide more honest and open discussion thereby enhancing data credibility [84,85]. Each WDST group comprised five children and lasted 40-55 (mean = 47.7) minutes. This number of child participants has been used in previous physical activity studies undertaken by the authors and has been shown to be optimal in generating good-quality representative data [51]. Each of the WDST groups comprised children from the same school. On arrival at each school, the first author randomly selected five consenting participant names to take part in a WDST group. The names of the selected children were provided to the class teachers at schools and children were excused from class to take part. The WDST groups took place in quiet non-intrusive school class rooms where participants and researcher could be overlooked but not overheard. All WDST groups were recorded using a digital recorder and were transcribed verbatim for further analysis and anonymised. In total, 7 WDST groups were conducted resulting in 242 pages of raw transcription data, Arial font, size 12, double spaced.

School transport data
Active school travel contributes to children's daily physical activity levels but is strongly influenced by household distance from school [30,86]. To offer a more detailed insight into children's unstructured out-of-school physical activity we assessed the prevalence of active travel as well as school-home distance. Household distance to school was objectively measured using Google maps online route planner https://www.google.co.uk/maps. The shortest route from school addresses to parent reported home addresses was used [86]. Transportation mode to school was child reported. Responses included (walk, cycle, scooter, bus, car, train, taxi, other). Responses were dichotomised into (0 reference category) active transport and (1) passive transport. Average participant travel distance from home to school was 1.51 km (Median = 0.9 km; IQR = 1.7 km).

Data management and analysis
The WDST method generated three separate sources of data, a frequency count (show activity), visual data (write and draw activity) and verbatim data (tell activity and children's write and draw narratives). The separate data sources were pooled together for complimentary purposes in order to expand, enhance and clarify findings from each of the separate data sources. In this case, one stage did not inform the next, rather a mixed analysis approach was taken and in doing so the analysis strands did not interact until the data interpretation stage. For the 'show' data, child written responses were summed to produce frequency counts.' Tell' data were analysed through a deductive and inductive process, firstly using the YPAPM [10] as a thematic framework reflecting the underlying study objectives, and then inductively to enable emergent themes to be further explored [87,88]. The pen profile approach has been used in recent child physical activity research (see [51,78] for detail) and presents findings from content analysis via a diagram of composite key emerging themes. For these reasons it is an appropriate and effective way of presenting data to researchers that have an affinity with both quantitative and qualitative approaches [60,81].
A similar analysis approach was undertaken with the write and draw data. Drawings needed to be a legible representation of people, events, and/or places to satisfy quality standards. Children's narratives were transcribed verbatim, classified as a written 'report' , and subsequently appended to each individual drawing. The reports and drawings were then used in combination to categorise 'marks' on paper in relation to specific themes (i.e. play, games, social interaction, environment). A 'mark' refers to where child 'reports' were identifiable with a 'theme'. In most cases each drawing identified more than one theme and thus more than one mark. For example a drawing containing a child participating in a game of football with friends would require marks for more than 1 theme (both social interaction and activity).
To ensure accuracy and allow for alternative interpretations of the data, the WDST group recordings, transcripts and drawings were independently reviewed by the second and third authors and were then cross-examined against the data in reverse, from the pen profiles to the transcripts and write and draw data sheets. This process was repeated until a 90 % agreement level had been reached by the group. Methodological rigor, credibility and transferability were achieved via verbatim transcription of data and triangular consensus procedures, and comparison of pen profiles with verbatim and illustration data accentuated dependability. In some instances visual illustrations are presented to add further context to the data. Quotations are labelled by the participant's pseudonym, boy (B) or girl (G), and ID number. The key emergent themes identified from the data are presented first.

Write and draw
Thirty children completed the write and draw task (14 boys), and 30 reports were extracted with 5 blank reports and 0 indefinable entries. Blank returns were due to insufficient time in one WDST group to complete the task. There were 88 marks from reports on specific themes. Figure 5 illustrates the composite pen profile with activity (n = 24), social interaction (n = 18) and physical environment (n = 46) as highest frequency themes. Physical activity equipment (n = 20), physical activity provision (n = 26), friends (n = 14), parents (n = 4), unstructured play (n = 9), games (n = 13), and recreational activities (n = 2) featured as lower order themes.
Sixty percent of children commuted actively to school. Eighty one percent and 95.2 % of these children lived within 1.0 and 2.0 km from school, respectively. The other 4.8 % lived within 3.0 km. Almost 30 % of the passive commuters lived within 1.5 km from school.

Discussion
The primary aim of this study was to explore children's current views, experiences and perceptions of out-ofschool physical activity. Physical activity intervention design is centred on identifying factors that facilitate and inhibit children's participation, but research featuring that of the child's voice is presently lacking. Using children's views, recounted experiences and perceptions of out-of-school physical activity the research presented here demonstrates how WDST may be advantageous when compared to more traditional singular methods based approaches [82]. WDST's principal strength is its triangulation of multiple data sources which generates a

Predisposing factors
Consistent with other studies [89,90], children in this study principally engaged in physical activity for reasons of fun and enjoyment. Within self-determination theory (SDT) [91,92], autonomous forms of motivation such as intrinsic motivation exist when the behaviour is viewed as enjoyable. In this study, the competitive and vigorous nature of organised physical activities appeared particularly appealing and enjoyable for many children as they perceived them to be more engaging and beneficial to physical health. In line with SDT [91,92], children's physical activity self-perceptions (i.e. self-efficacy and perceived competence) were both key influences on physical activity enjoyment and participation, with children expressing a sense of enjoyment towards activities that they are 'good' at. Children with higher self-perceptions possess higher motivation to be physically active and approach physical activity related tasks with a high expectancy of success, leading to greater perseverance and enjoyment in physical activity than children with low physical activity self-perceptions (e.g., [93,94]). Although children's sense of competence can be related to both perceived physical activity skill and experience, evaluative feedback from significant others, largely that of parents, but also friends, is understood to be of particular importance [95]. Alternatively, activity monitors such as pedometers provide feedback reflecting individual activity behaviour and serve as a tool to self-monitor and set personalised goals. Increasing self-efficacy by providing feedback about physical activity may effectively increase physical activity in children [96,97].

Enabling factors
Almost all children reported physical activity access and provision availability as key physical activity facilitators. The weekday after school period provided children with the greatest perceived access to clubs and recreational facilities and with this in mind, many children consequently determined after-school as one of their most active time periods. The weekend was also linked to high activity with greater opportunities for competitive sport participation (particularly football) and family-based activities such as bike riding and walking relative to other periods of the week. Children credited this to both them and their parents having greater discretional time to partake in physical activity on weekend days. Such findings are in contrast to recent quantitative studies that reported significant declines in physical activity during out-of-school periods compared to other periods [98,99]. These conflicting findings could be attributed to children not accounting for the unstructured physical activity they participate in throughout the school day on the playground and their active transport to and from school.
Indeed, few children in this study accounted for engagement in unstructured forms of physical activity such as active travel, dog walking or active play, even though 60 % of participants walked to school regularly. As seen in the show data, children generally attributed physical activity with sport, which was confirmed within the write and draw data, with children expressing a greater recollection of structured physical activities, games (i.e. football) [refer to Fig. 5]. Interestingly, almost 30 % of children in this study live within 1.5 km of the school yet do not commute to school actively. Active commuting to school and to other activities is associated with improved health [100], fitness [101][102][103] and energy balance [104,105], and serves as a valuable opportunity for children to significantly increase daily physical activity levels [106][107][108]. Increasing children's and parents awareness of the various forms of physical activity such as active travel and unstructured play, and how these contribute to children achieving daily physical activity recommendations is warranted.
The visual and verbal data generated from the novel dual methodology revealed new insights and shed light on aspects of the built environment that support children's out-of-school physical activity which may have been overlooked in previous surveys [109,110] and singular qualitative methods based studies [73,74]. Public parks were a popular location for physical activity but proximity to public parks influenced regular park use among children, especially unsupervised park visits. In addition to accessibility, the quality of provision and playground equipment at parks was related to children's park use and also their experience, with children expressing a greater sense of enjoyment when there was a high prevalence of playground equipment at local public parks. Moreover, the provision of grassed areas and playground equipment appeared fundamentally important to children's physical activity within drawings [refer to Figs. 5 and 6], so much so, many children reported travelling with parents to parks farther afield that are larger in size and have 'better' provision. The narrative complementing children's drawings verified the content in drawings, and added context to the drawings by revealing insights on the reasons for the inclusion of specific content [refer to Fig. 6]. Such supplementary data would have been overlooked using traditional write and draw analysis approaches and may have influenced study findings. For example, I like grass, because I just think it's easy to do things on, and you can do quite a lot of things, whereas concrete, it's quite dangerous, and you could fall. And I like climbing trees…..and a gymnastics bar, because me and my sister, we use the bar where you swing, and you do like flips and stuff, because me and my sister, she's younger than me, we've got this swing, and it's high, well, about this high, and we like climbing up to the top of it and swinging, and doing flips on it, so I like that. And I'd like a netball post, because I like netball and stuff like that, and lots of bushes, so we could play hide and seek [G/RL24].
Furthermore, although some children reported creative methods to overcome a lack of equipment, such as using clothing as goal posts, they also reported that greater availability of adequate provision (i.e. goal posts and designated green space areas) would further enhance their activity enjoyment. In order to promote regular park use among children and families a variety of features within parks may be required to support the needs of different family members [111,112]. Future formative studies may benefit from using a similar methodology to that used here, especially those planning environmental interventions.
Proximity also influenced school transport mode in this study. Most school walkers appeared to have a high level of independent mobility, with the majority of children walking to school either alone, with siblings, or friends. While this may be because of the relatively short distance to school [30,106], it could also be due to the presence of siblings and/or or friends which have both been associated with children's increased independent mobility [113,114]. In addition to the health benefits of walking to school [102], unescorted school trips could be used as a stepping stone to more broader independent mobility (i.e., outdoor play) by developing parents' reassurances [115]. For example: Well, in the car you're just sitting there, and then on a bike you're actually like it's fun, and you're actually getting something from it because it's good for you, and it's better than just getting in the car and just driving [G/KD45].
Despite home gardens/yards being a safe, popular and convenient location for children's physical activity [110], the size of the enclosed space limited the activities that children engaged in and consequently influenced whether children used their garden/yard regularly for physical activity in this study. Although not investigated here, the absence of a garden/yard may promote greater neighbourhood play among children [116]. Consistent with previous findings, the neighbourhood environment for some children was another prime location for physical activity [117]. This was especially true for children living in cul-desacs and those living away from main roads, owing to higher independent mobility from parents. However, for most children unsupervised outdoor play was restricted because of parental fear regarding road traffic and children being 'taken by strangers'. Such findings Fig. 6 Drawing from a girl aged 11 illustrating activity equipment and provision add to the existing body of evidence on social and built environmental influences [30,33,36,118,119], and in particular, cul-de-sac residency [109,120] on children's independent mobility and play behaviours.
Although low neighbourhood street connectivity (i.e., intersections) is associated with lower child [121] and adult walkability [122], it also reduces motorised traffic volumes, providing a safer open area for children to engage in outdoor play (e.g., football, tag) in close proximity to their home [123,124]. Creating safe play spaces free of motorised traffic in neighbourhoods could also be an effective way of increasing children's independent mobility and in turn increasing physical activity, partly by shaping parents' perceptions of their children's safety [125][126][127]. Such neighbourhood improvements may be particularly important for younger children and children without a garden/backyard and/or limited access to recreational green space. Moreover, providing connections between streets that are only accessible by foot rather than motorised transport may also provide a neighbourhood environment conducive to children's play and active travel for both children and adults and should be considered by future urban planners. These findings support the need for continued traffic calming and safer route measures to alleviate parental safety concerns and support UK children's outdoor play and active travel [128,129].
Quantitative research has shown that children who are provided with the freedom to travel actively and play outdoors independent of adult supervision accumulate more physical activity [130,131] and have better health than those who do not [34,132,133]. This study however revealed some insight into how children gain access to outdoor play and the practices used by parents to build trust and manage the perceived risks posed to children outdoors. Firstly, children in this study that were allowed to play outdoors regularly in the neighbourhood reported spatial and temporal boundaries placed on their outdoor play. For example: Because I can play out, but my Mum has like a thing that I have two lampposts, and I'm not allowed to go past them [B/K13].
Moreover, children were provided with greater independent mobility when playing with friends or at nearby recreational areas [refer to Fig. 7]. The presence of other children playing out in the neighbourhood may help to reduce heightened parental neighbourhood safety concerns by way of safety in numbers [134]. Children in this study whose parents were anxious about allowing them to travel to recreational areas alone or with friends through fear of them being taken by strangers were dependent on their parents having the time and motivation to take them to recreational areas to be active. Children's licence to play outdoors may be dependent on locally constituted beliefs about 'good parenting' , with some parents restricting their children from playing outdoors through fear of challenging the social norm, irrespective of their own personal neighbourhood safety perceptions [135,136]. As key gate keepers to children's outdoor play, parents' qualitative Fig. 7 Drawing from a boy aged 10 illustrating outdoor play close to home input is warranted to explore the relationship between UK children's independent mobility and neighbourhood social norms by socio-economic background [ Fig. 7 near here].
Well, we're at my mate's house, and outside there we play footie, like on the path [B/RL11].

Reinforcing factors
Consistent with prior quantitative research [137,138], peer support was a key influence on children's physical activity and the presence of friends was a central theme throughout children's drawings [refer to Figs. 5 and 8]. The dual methods used here revealed that friends provided social support in the form of co-participation (i.e., engaging in activity together), and their presence enhanced activity enjoyment and added greater meaning to physical activity. For example, when children alluded to playing games such as football it was in the context of playing football with friends rather than playing alone.
'M in goal, me, and N and little D. Because they're my mates, and, like I say, I always play football with them' [B/K20].
Moreover, friends also played a critical role in setting children's physical activity patterns as documented in previous quantitative studies [139,140]. The narrative reported here however offered explanations as to why this may be. Being of similar age was important for children as it increased the likelihood of possessing similar physical activity interests. Also, outdoor play levels were dependent on other children living in the neighbourhood, with some children reporting declines in their outdoor play following friends moving home out-of-the neighbourhood, whereas others reported increased outdoor play levels following moving home to neighbourhoods where similar aged children played outdoors regularly. For example: 'Well, where I used to live there was loads, but because I was about six, five, and they were like nine and all that, so they didn't really want to play with me and my little sister, because we're like little, but now we've got someone called L, and she is in this class, and my sister's in Year Four, and I've got a friend who's in BS, and she's in Year Five, and then I've got RL32 and all that [G/RL15].
Recent experimental and observational research found that the presence of friends significantly increased children's physical activity enjoyment [141,142], motivation [143], intensity [144], and out-of-school physical activity engagement [145]. Together, these and our findings suggest that future interventions promoting physical activity with friends and encouraging greater social interaction particularly outside of school may be a promising approach to increasing physical activity levels among UK children.
A recurring theme throughout the data was children's significant need for parental support. Parental support is a consistent correlate of child physical activity [18,146] Fig. 8 Drawing from a boy aged 11 illustrating playing football with friends but research underpinning how parental support influences children's out-of-school physical activity is scarce. This study found that parents supported children's physical activity in a variety of ways; however, verbal encouragement appeared to have the greatest effect on children's emotions and their physical activity. Verbal support ranged from parents encouraging children to play outdoors instead of spending prolonged time indoors, to offering positive encouragement to children when considering ceasing physical activity participation. Both appeared to play a key role in influencing children to engage in more physical activity. Although logistical forms of support are consistent correlates of child physical activity [18,146,147], their limited presence within the current study data suggests that they play a less influential role on children's physical activity relative to verbal methods. Given that parental verbal encouragement is highly amenable to change, future physical activity promotional strategies directed towards increased verbal encouragement informed by improving parental knowledge of how and where to be active in the local neighbourhood may prove useful in increasing children's physical activity levels, particularly for children whose parents face physical, financial, or time restrictions [45,148,149].
It was apparent from the data that active parents, particularly fathers, were a strong motivator for children's physical activity, despite the inconsistent relationship within the quantitative literature [150,151]. Moreover, the direct involvement of parents in physical activities with children was also influential on children's physical activity behaviour which supports previous findings [39,152].
Sunday my parents help me to do more physical activity when we go for a walk over the weekend. When I joined the Harriers (running club)…I would go with my Dad, because we both like running [B/G02].
Children's drawings complemented such findings. Interestingly though, when parents were included in drawings it was fathers that were cited more frequently than mothers. One drawing in particular included a father engaged in physical activity with his two sons whereas mother was sitting down watching suggesting that, as portrayed here, some children may associate physical activity co-participation with fathers relative to mothers [refer to Fig. 9]. Beets and Foley [152] found that the amount of time fathers spent with their children was positively related to children's physical activity. In light of our findings and recent qualitative [44] and experimental research [153], father-child co-participation may be an effective strategy for improving children's physical activity. However, to appeal to all familial structures, future family-based interventions should consider encouraging parents to engage in more physical activity with their children. The weekend period may be an appropriate time to encourage physical activity between parents and children due to children not attending school and parents having fewer work responsibilities. With regards to family recreational activity, popular activities included walking, swimming Fig. 9 Drawing from a boy aged 10 illustrating family-based physical activity and visiting public parks. Public parks play an important role in supporting physical activity, providing all families regardless of socio-economic position with the opportunity to walk, cycle, and many have specific equipment for other health enhancing physical activities [154,155]. Promoting greater use of public parks together with information relating to fun and enjoyable activities that families can engage in together may increase park use and physical activity among families [156]. Although a range of inhibiting factors including weather and school were identified by children in relation to out-of-school physical activity, the adverse influence of parents was consistent across all WDST groups. Children's inability to access physical activity provision without the presence of their parents due to parental time constraints was a key participation barrier. Providing children and families with information on how children can best incorporate low cost physical activity into their daily lives such as walking and cycling to school or unstructured physical activity rather than structured activities that require parental presence and logistical support may be useful. Correlates research has found that children who experience fewer parental restrictions on their screen time spend significantly greater time sedentary indoors [25][26][27].
In this study, screen time acted as a barrier to physical activity, particularly during weekends when children had more discretionary time and autonomy over their sedentary pursuits due to no schooling and less structured activity provision. Interestingly, children reported higher levels of physical activity when parental restrictions were placed on their TV viewing and console game use in response to boredom, suggesting that parental monitoring of children's screen-time may be another important parenting practice to target in future family-based intervention strategies.
Sometimes they don't let me play on my X Box……., but I just like go outside and play football or something [B/G27].
Given that parental sedentary behaviour restriction had a positive effect on children's physical activity in this study with children opting to play outdoors, educating parents to encourage children to play outdoors more regularly with friends rather than confining children to the home environment could be a cost effective and potentially valuable means of increasing physical activity, reducing sedentary time, and improving health in UK children [157]. Advocating play and emphasising outcomes such as positive social, emotional, and cognitive well-being rather than simply the physical dangers of its absence (i.e., obesity), may resonate more strongly with parents when suggesting that their child be more active, particularly outdoors [158].
Several strengths are apparent in the present study. The development of a dual method, named here as WDST respected the expert knowledge of the children, allowed for a deeper insight of children's experiences and perceptions, and in doing so generated a rich data set representing 'children's voices' [159]. Most importantly, the combination of methods enhanced data credibility, and revealed interconnected and complementary findings on children's views, experiences and perceptions of out-of-school physical activity that would have been overlooked via survey, adult focussed, or single qualitative methods based research. Whilst the write and draw method has been used extensively in health related research a lack of consensus around analysis has led to questions regarding its validity [54]. Alternatively, we listened to children as they drew and explored the narrative elicited from children's drawing which recognised the social context and verified content in the drawings [65,66]. Moreover, the triangulation of children's drawings and supporting narrative meant that the analysis was not solely dependent upon the researcher's interpretation of the data, and in doing so, reduced the risk of misinterpreted views, improved data credibility, and enhancing confidence in the findings [82,160].
Further methodological strengths include the penprofile analyses which illustrate accurately the consistency of themes in the data, rather than over-representing minority views, and the supplementary verbatim quotations verified children's voice [161]. Moreover, the triangulation consensus of data between authors provided credibility, transferability, and dependability, and the audit trail presented here clearly outlines and justifies comprehensively the methodological decisions made throughout the study providing transparency and trustworthiness, enabling future studies to adopt a similar methodological approach [162]. In addition, this research advances previous qualitative studies by extended the literature base on children's out-ofschool physical activity by considered all components of the YPAPM [10] including the influence of peers and independent mobility, which provides new insights into an understudied area. With regards to limitations, the influence of participant bias may limit the generalisability of findings, with only 34.8 % of eligible participants providing informed consent and assent, and 19.1 % taking part.

Conclusions
The WDST method generated complimentary interconnected data which was theoretically grounded and confirmed and uncovered new insights into factors relevant to children's out-of-school physical activity. Specifically, the findings of this study add to our understanding of the mechanisms through which parents influence children's activity related behaviours, and provide an insight into potential target areas for future out-of-school physical activity interventions aimed at primary school aged children. Parental involvement in future physical activity promotional strategies is essential given that paradoxically, parents served as both significant enablers (i.e. encouragement) and barriers (i.e. restricting participation) to children's physical activity in this study. Our research concurs with that of others who report parents are physical activity gatekeepers, 'choice architects' , and governors of the home environment and as such, are in a key position to promote behaviours that are conducive to children's health [23,24,163]. Thus, parents' qualitative input is important to supplement children's voices and inform future family-based intervention design [164].
Our findings suggest that children should be encouraged to spend more time with friends and play outdoors more. Increasing children's levels of unstructured physical activity such as active transport and active play is warranted, but is likely to be mediated by parental license, and be dependent upon community and societal level changes to create safer neighbourhood spaces [165]. Further experimental evidence is needed to establish whether changes in parental neighbourhood perceptions positively increase children's opportunity to engage in independent active travel and outdoor play.
We conclude that the WDST methodology developed here is an inclusive, interactive, and ethically compliant child-centred dual research method that enhances credibility by triangulating data sources and limiting researcher biases. It thus serves to benefit future researchers and practitioners aiming to elicit children's perceptions and experiences. Further research applying WDST is needed within physical activity and health contexts to further validate its appropriateness and assist in its evolution as a child-centred method.

Availability of data and materials
Supporting data for this study is not openly available as participants did not provide informed consent for data sharing.
Abbreviations B: boy; G: girl; MVPA: moderate to vigorous intensity physical activity; WDST: write, draw, show and tell; YPAPM: youth physical activity promotion model.

Competing interests
The authors declare that they have no competing interests.
Authors' contributions RJN drafted the manuscript and was responsible for data collection and analyses. LMB, SJF and ZRK made substantial contributions to the study design and editing the manuscript. All authors read and approved the final manuscript.