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Table 3 Characteristics of physical and physiological variables: HIT and control group at baseline and post-intervention

From: High intensity interval running enhances measures of physical fitness but not metabolic measures of cardiovascular disease risk in healthy adolescents

Characteristic

Baseline

Post-intervention

Mean difference

Effect size

Within group

Between groups

(95%CI)

(Power)

P- value

P-value

   

(Post Intervention)

Stature (cm)

     

0.821

HIT (42)

170.2 ± 8.3

171.1 ± 8.3

0.9 (0.6 to 1.3)

0.76 (95%)

0.000

 

Control (46)

171.6 ± 8.2

172.5 ± 8.2

0.9 (0.6 to 1.2)

0.87 (95%)

0.000

Mass (kg)

     

0.918

HIT (38)

70.4 ± 8.9

70.2 ± 9.0

0.2 (-0.8 to 0.3)

 

0.350

 

Control (47)

71.9 ± 9.7

72.4 ± 9.4

0.5 (0.3 to 0.9)

0.32 (56%)

0.036

BMI

    

0.168

0.842

HIT (38)

21.5 ± 2.4

21.3 ± 2.3

0.2 (0.1 to 0.5

 

0.178

 

Control (46)

22.6 ± 2.6

22.3 ± 2.5

0.3 (-0.2 to 0.4)

  

Waist circumference (cm)

     

0.695

HIT (42)

75.3 ± 6.7

75.3 ± 6.7

0.002 (-0.7 to 0.7)

 

0.995

 

Control (47)

73.9 ± 5.9

75.4 ± 6.2

1.5 (1.0 to 2.0)

0.91 (99.9%)

0.000

Systolic BP (mmHg)

     

0.146

HIT (38)

119 ± 13

114 ± 13

4.9 (-8.4 to -1.4)

0.46 (78.6%)

0.008

 

Control (39)

119 ± 14

116 ± 15

3.3 (-7.4 to 0.8)

 

0.109

 

Diastolic BP (mmHg)

     

0.672

HIT (38)

69 ± 11

68 ± 9

0.9 (-5.5 to 3.7)

 

0.689

 

Control (39)

70 ± 12

66 ± 12

3.5 (-8.3 to 1.3)

 

0.144

CMJ (cm)

     

0.042

HIT (41)

30.7 ± 6.7

31.7 ± 7.1

1.0 (0.3 to 1.6)

0.49 (86.6%)

0.003

 

Control (38)

31.8 ± 6.6

29.7 ± 6.3

2.1 (-3.0 to -1.1)

0.72 (99.1%)

0.000

10 m sprint (s)

     

0.003

HIT (37)

2.06 ± 0.26

1.97 ± 0.21

0.09 (-0.12 to -0.05)

0.78 (99.6%)

0.000

 

Control (37)

2.04 ± 0.20

2.01 ± 0.18

0.03 (-0.01 to 0.06)

 

0.167

5-0-5 agility (s)

     

0.095

HIT (42)

2.58 ± 0.28

2.54 ± 0.30

0.05 (-0.10 to 0.01)

 

0.090

 

Control (37)

2.45 ± 0.25

2.58 ± 0.28

0.13 (-0.18 to -0.07)

0.79 (99.7%)

0.000

CRF (Shuttles)

     

0.277

HIT (41)

79 ± 25

84 ± 26

4.6 (2.8 to 6.5)

0.78 (99.8%)

0.000

 

Control (47)

82 ± 25

78 ± 22

3.4 (-6.9 to 0.1)

 

0.056

  1. Abbreviations: HIT High Intensity group, BP Blood Pressure, CRF CRF, CMJ Counter movement jump, CI confidence interval. Paired samples t-test was used to establish differences between post-intervention measures for each group. ANCOVA was used to test differences between the groups at post-intervention adjusted for the covariates (baseline age, sex, maturation, physical activity, total dietary fat, saturated fat and kcal/d difference as well as differences in waist circumference and shuttle run score) where appropriate.
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BMC Public Health

ISSN: 1471-2458

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