Table 3

Changes in outcome between the intervention group doing high-intensity interval training and the control group and changes within the groups from baseline to 9 months of follow-up

N=61Baseline mean both groups9 months change from baselineMean difference between groups 9 months
ControlIntervention
Cardiorespiratory
fitness
 VO2max (mL/kg/min)
 95% CI
 P values
29.51
27.97 to 31.05
0.21
−0.81 to 1.22
0.69
3.29
2.23 to 4.34
<0.001
3.08
1.63 to 4.53
<0.001
 HR (beats/min)
 95% CI
 P values
65.8
63.3 to 68.3
-0.4
-3.4 to 2.7
0.82
1.9
−1.2 to 4.9
0.24
2.2
−1.9 to 6.3
0.29
Body compositIon
 Truncal fat%
 95% CI
 P values
42.53
40.43 to 44.63
-0.17
-1.03 to 0.70
0.71
-1.08
-1.96 to −0.21
0.02
-0.92
-2.14 to 0.31
0.14
 Total fat%
 95% CI
 P values
39.48
37.91 to 41.05
-0.29
-0.93 to 0.35
0.37
-0.80
-1.44 to −0.16
0.02
-0.50
-1.41 to 0.40
0.27
 BMI (kg/m2)
 95% CI
 P values
28.10
27.07 to 29.14
0.07
−0.27 to 0.41
0.67
-0.32
-0.66 to 0.02
0.07
-0.39
-0.87 to 0.09
0.11
 Lean muscle mass (g)
 95% CI
 P values
48 460
47 074 to 49 847
-71
-669 to 527
0.82
-524
-1125 to 76
0.09
-453
-1297 to 390
0.29
  • Adjusted for age and sex.

  • BMI, Body Mass Index; HR, resting heart rate; VO2max, maximal oxygen uptake.