a, Reasons for engagement (sub-themes associated with how engagement resulted from the individual themselves, when the device delivered a notification or when other people prompted them to)
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Engagement driven by the participant
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Engagement driven by the device(s)
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Engagement driven by other people
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b, The relationship between behaviour and physiology (sub-themes associated with recognizing the relationship between behaviour and physiology, self-experimentation and the implications of this on patterns of engagement over time)
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Recognizing the relationship
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Self-experimentation
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Implications over time
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c, The various metrics shown lacked meaning (sub-themes associated with difficulty interpreting the data, feeling unsure as to how to respond to the data and seeking external sources of information)
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Interpreting glucose data
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Unsure how to respond to the data
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Using online resources
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d, Changes to movement behaviours (sub-themes associated with being more physically active and interrupting time spent sitting)
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Becoming more physically active
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Interrupting sitting time
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e, Changes to diet (sub-themes associated with making changes to the timing and type of food consumed and portion sizes)
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Changing what food was consumed
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Changing when food was consumed
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f, Barriers to behaviour change (sub-themes associated with internal and external barriers)
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Internal barriers
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External barriers
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