Table 2.
Cardiorespiratory and energy expenditure (EE) data of normal-weight and obese subjects
| NW (n = 27) | OB (n = 25) | Cohen’s d | 95% CI | ||
|---|---|---|---|---|---|
|
Cycle ergometer at 50 W |
HR (b/min) | 120.1 ± 15.8aa | 120.3 ± 17.5bb | -0.01 | -0.552 to 0.536 |
| Intensity (%HRmax) | 62.7 ± 8.1aa | 62.9 ± 9.0bb | -0.03 | -0.574 to 0.514 | |
| Gross VO2 (L/min) | 1.07 ± 0.15aa | 1.15 ± 0.16bb | -0.54 | -1.090 to 0.018 | |
| Net VO2 (L/min) | 0.79 ± 0.15aa | 0.84 ± 0.15bb | -0.24 | -0.788 to 0.304 | |
| RER | 0.832 ± 0.064aa | 0.805 ± 0.05bb | 0.47 | -0.081 to 1.023 | |
| Gross VO2 (ml/kg/min) | 16.6 ± 2.0**aa | 14.0 ± 2.4bb | 1.20 | 0.599 to 1.784 | |
| Gross VO2 (ml/kg FFM/min) | 20.0 ± 2.7aa | 19.2 ± 3.7bb | 0.26 | -0.291 to 0.802 | |
| Net VO2 (ml/kg/min) | 12.4 ± 2.1**aa | 10.2 ± 2.2bb | 1.06 | 0.472 to 1.636 | |
| Net VO2 (ml/kg FFM/min) | 15.0 ± 2.8aa | 14.0 ± 3.3bb | 0.33 | -0.217 to 0.878 | |
|
Cycle ergometer at 100 W |
HR (b/min) | 141.5 ± 20.3 | 137.0 ± 17.5 | 0.24 | -0.311 to 0.781 |
| Intensity (%HRmax) | 73.8 ± 10.5 | 71.7 ± 9.2 | 0.21 | -0.333 to 0.758 | |
| Gross VO2 (L/min) | 1.59 ± 0.18* | 1.71 ± 0.18 | -0.64 | -1.189 to -0.074 | |
| Net VO2 (L/min) | 1.32 ± 0.18 | 1.39 ± 0.18 | -0.39 | -0.938 to 0.161 | |
| RER | 0.897 ± 0.065 | 0.864 ± 0.064 | 0.52 | -0.038 to 1.069 | |
| Gross VO2 (ml/kg/min) | 24.9 ± 3.2** | 20.8 ± 2.9 | 1.35 | 0.740 to 1.949 | |
| Gross VO2 (ml/kg FFM/min) | 29.9 ± 4.0 | 28.5 ± 4.6 | 0.33 | -0.220 to 0.876 | |
| Net VO2 (ml/kg/min) | 20.7 ± 3.2** | 16.9 ± 2.7 | 1.25 | 0.652 to 1.845 | |
| Net VO2 (ml/kg FFM/min) | 24.9 ± 4.1 | 23.2 ± 4.2 | 0.39 | -0.161 to 0.938 | |
| Treadmill running at 7 km/h | HR (b/min) | 147.5 ± 21.3cc | 151.4 ± 16.0dd | -0.21 | -0.749 to 0.341 |
| Intensity (%HRmax) | 76.9 ± 11.0cc | 79.2 ± 8.4dd | -0.23 | -0.775 to 0.317 | |
| Gross VO2 (L/min) | 1.84 ± 0.17**cc | 2.19 ± 0.22dd | -1.79 | -2.432 to -1.138 | |
| Net VO2 (L/min) | 1.57 ± 0.17**cc | 1.87 ± 0.21dd | -1.58 | -2.200 to -0.949 | |
| RER | 0.843 ± 0.069 | 0.846 ± 0.051 | -0.05 | -0.594 to 0.494 | |
| Gross VO2 (ml/kg/min) | 28.7 ± 2.9**cc | 26.5 ± 2.2dd | 0.88 | 0.303 to 1.443 | |
| Gross VO2 (ml/kg FFM/min) | 34.6 ± 3.7cc | 36.3 ± 3.8dd | -0.45 | -1.002 to 0.101 | |
| Net VO2 (ml/kg/min) | 24.5 ± 3.0*cc | 22.7 ± 2.1dd | 0.74 | 0.169 to 1.294 | |
| Net VO2 (ml/kg FFM/min) | 29.6 ± 3.8cc | 31.1 ± 3.4dd | -0.41 | -0.962 to 0.138 | |
| Treadmill running at 8 km/h | HR (b/min) | 155.5 ± 20.2 | 159.4 ± 17.1 | -0.21 | -0.751 to 0.340 |
| Intensity (%HRmax) | 81.1 ± 10.5 | 83.4 ± 9.0 | -0.23 | -0.777 to 0.315 | |
| Gross VO2 (L/min) | 2.02 ± 0.24** | 2.40 ± 0.20 | -1.72 | -2.357 to -1.077 | |
| Net VO2 (L/min) | 1.76 ± 0.25** | 2.09 ± 0.19 | -1.5 | -2.114 to -0.877 | |
| RER | 0.847 ± 0.057 | 0.852 ± 0.057 | -0.08 | -0.625 to 0.464 | |
| Gross VO2 (ml/kg/min) | 31.6 ± 3.8** | 29.1 ± 2.3 | 0.77 | 0.200 to 1.329 | |
| Gross VO2 (ml/kg FFM/min) | 38.0 ± 5.0 | 39.9 ± 4.3 | -0.41 | -0.956 to 0.144 | |
| Net VO2 (ml/kg/min) | 27.4 ± 4.0* | 25.3 ± 2.2 | 0.64 | 0.080 to 1.196 | |
| Net VO2 (ml/kg FFM/min) | 33.3 ± 5.2 | 34.7 ± 3.9 | -0.37 | -0.919 to 0.179 |
*p < 0.05 compared with the same data between NW and OB; **p < 0.01 compared with the same data between NW and OB; aa p < 0.01 CE at 50 vs. 100 W in NW group; bb p < 0.01 CE at 50 vs. 100 W in OB group; cc p < 0.01 TR at 7 vs. 8 km/h in NW group; dd p < 0.01 TR at 7 vs. 8 km/h in OB group