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Table 2 Results and effect sizes for aerobic performance and modified shuttle walk at baseline and at the end of the 12-week training period

From: Aerobic exercise in adolescents with obesity: preliminary evaluation of a modular training program and the modified shuttle test

   Baseline 12-week training period p-value Effect size
Aerobic performance     
VO2 peak mL/min 2768.6 ± 416.3 3252.2 ± 490.8 P < 0.0001 2.4
  mL/kg·min 26.8 ± 3.3 35.2 ± 4.5 P < 0.007 2.5
  mL/kg·FFM 47.4 ± 6.4 58.4 ± 7.7 P < 0.0001 2.4
  %predicted 115.5 ± 25.1 134.6 ± 28.0 P < 0.0001 2.7
Wmax W 200.0 ± 45.4 216 ± 42.2 P < 0.0001 0.8
  W/kg·FFM 3.4 ± 0.6 3.9 ± 0.5 P < 0.0001 1.2
HRmax cycle ergometer beats/min 182.6 ± 7.1 185.3 ± 7.1 ns na
RER   1.2 ± 0.07 1.2 ± 0.06 ns na
VO2 peak/HRmax mL/beat 15.2 ± 2.2 17.6 ± 2.7 P < 0.001 1.6
Modified shuttle walk     
Distance completed m 775.0 ± 213.9 1026.7 ± 229.5 P < 0.0001 2.5
HRmax shuttle beats/min 187.8 ± 5.0 187.5 ± 4.2 ns na
  1. VO2 peak = peak oxygen uptake; FFM = fat-free mass; Wmax = maximal workload; HRmax = maximum heart rate; RER = respiratory exchange ratio; VO2 peak/HRmax = oxygen pulse. ns = not significant; na = not applicable