Table 1.
Energy expenditure and metabolic responses during isocaloric low and high intensity exercise trials
| LO | HI | |
|---|---|---|
| Total EE (kcal) | 412 ± 11 | 403 ± 1 |
| Rate of EE (kcal min−1) | 6.0 ± 0.3 | 11.5 ± 0.7* |
 |
38.8 ± 0.4 | 79.4 ± 1.5* |
| Exercise time (min) | 69.9 ± 4.0 | 36.0 ± 2.2* |
| RER | 0.90 ± 0.01 | 0.98 ± 0.01* |
| CHO oxidation rate (g min−1) | 0.9 ± 0.1 | 2.5 ± 0.2* |
| Total carbohydrate oxidized (g) | 64 ± 2 | 89 ± 3* |
| Rate of fat oxidation (g min−1) | 0.23 ± 0.02 | 0.12 ± 0.04* |
| Total fat oxidized (g) | 15 ± 1 | 4 ± 1* |
| Rate of glycogen utilization (mmol (kg dw)−1 min−1) | 1.3 ± 0.2 | 3.1 ± 1.0* |
| Plasma lactate at rest (mm) | 1.12 ± 0.16 | 0.99 ± 0.14 |
| Plasma lactate at termination (mm) | 1.22 ± 0.11 | 7.23 ± 1.07* |
Values are mean ±s.e.m.
*
Significantly different from low intensity trial (P < 0.05). EE, energy expenditure; CHO, carbohydrate; RER, respiratory exchange ratio.