Table 4.
Changes in carbohydrate and fat oxidation indices before (pre) and after (post) the intervention for the two training groups (HIIT10 and HIIT60).
| HIIT10 | HIIT60 | Pre-Post Change | ||||||
|---|---|---|---|---|---|---|---|---|
| Pre | Post | Pre | Post | (90% CI) | Effects | p-Value; ES | η2 | |
| PFO | 0.20 | 0.33 | 0.24 | 0.34 | 0.12 | Time (pre vs. post) | <0.001; ES: 1.65 | 0.699 |
| (g/min) | ±0.05 | ±0.08 | ±0.06 | ±0.09 | (0.08, 0.15) | Group | 0.536 | 0.028 |
| Time × Group | 0.525 | 0.030 | ||||||
| PFO | 3.72 | 6.11 | 4.23 | 6.19 | 2.18 | Time (pre vs. post) | <0.001; ES: 1.72 | 0.670 |
| (mg/min | ±0.74 | ±1.24 | ±0.82 | ±1.92 | (1.54, 2.82) | Group | 0.54 | 0.027 |
| /kg LBM) | Time × Group | 0.597 | 0.020 | |||||
| Fatpeak | 33.2 | 36.6 | 34.1 | 38.6 | 3.9 | Time (pre vs. post) | 0.039; ES: 0.68 | 0.270 |
| (%VO2peak) | ±5.5 | ±7.1 | ±3.8 | ±6.5 | (1.2, 6.7) | Group | 0.547 | 0.026 |
| Time × Group | 0.783 | 0.006 | ||||||
| Fatpeak | 60.1 | 62.2 | 58.7 | 63.6 | 3.5 | Time (pre vs. post) | 0.011; ES: 0.10 | 0.383 |
| (%HRpeak) | ±5.8 | ±5.3 | ±7.3 | ±4.4 | (1.5, 5.5) | Group | 0.989 | <0.001 |
| Time × Group | 0.263 | 0.089 | ||||||
| COP | 29.8 | 40.8 | 32.3 | 36.9 | 7.8 | Time (pre vs. post) | 0.023; ES: 1.01 | 0.363 |
| (%VO2peak) | ±6.2 | ±6.9 | ±6.2 | ±10.4 | (3.2, 12.4) | Group | 0.793 | 0.006 |
| Time × Group | 0.301 | 0.089 | ||||||
| PCHO | 2.42 | 2.93 | 2.41 | 3.11 | 0.61 | Time (pre vs. post) | <0.001; ES = 1.03 | 0.620 |
| (g/min) | ±0.45 | ±0.68 | ±0.62 | ±0.52 | (0.32, 0.89) | Group | 0.732 | 0.009 |
| Time × Group | 0.466 | 0.038 | ||||||
Values are expressed as means ± standard deviation. Bold font highlights statistically significant differences. 90% CI, 90% confidence interval; η2, partial eta squared; ES, effect size; COP, crossover point; PCHO, peak carbohydrate oxidation rate; Fatpeak, exercise intensity corresponding to peak fat oxidation; HRpeak, peak heart rate; LBM, lean body mass; PFO, peak fat oxidation rate; VO2peak, peak oxygen uptake; Wpeak, peak power.