TABLE 3.
Exercise effects on fatigue and physiological outcomes.
| Baseline (Mean ± SD) | Baseline to Postintervention | |||
|---|---|---|---|---|
| Within-Group Differences, Mean (95% CI) | Between-Group Differences, Mean (95% CI) | |||
| Fatigue | ||||
| Total fatigue | RT-HIIT | 2.59 ± 3.46 | −0.02 (−1.45 to 1.42) | −1.25 (−2.58 to 0.09) |
| AT-HIIT | 1.70 ± 2.31 | 0.31 (−0.95 to 1.57) | −1.59 (−2.94 to −0.24)* | |
| UC | 2.27 ± 2.82 | 1.57 (0.72 to 2.41)* | Reference | |
| Physical fatigue | RT-HIIT | 2.53 ± 3.35 | 0.05 (−1.44 to 1.54) | −1.48 (−2.98 to −0.02)* |
| AT-HIIT | 1.76 ± 2.56 | 0.52 (−0.89 to 1.94) | −1.60 (−3.12 to −0.09)* | |
| UC | 2.62 ± 3.22 | 1.64 (0.63 to 2.65)* | Reference | |
| Physiological outcomes | ||||
| Cardiorespiratory fitness (L·min−1) | RT-HIIT | 2.34 ± 0.49 | −0.09 (−0.23 to 0.05) | 0.21 (−0.01 to 0.43) |
| AT-HIIT | 2.23 ± 0.48 | 0.03 (−0.09 to 0.15) | 0.31 (0.09 to 0.53)* | |
| UC | 2.26 ± 0.49 | −0.29 (−0.44 to −0.14)* | Reference | |
| Lower-limb muscle strength (kg) | RT-HIIT | 88.87 ± 28.94 | 16.21 (8.72 to 23.81)* | 21.65 (10.04 to 33.26)* |
| AT-HIIT | 81.27 ± 24.17 | 12.68 (7.11 to 18.25)* | 17.53 (6.03 to 29.04)* | |
| UC | 87.31 ± 26.02 | −6.00 (−13.49 to 1.49) | Reference | |
| Handgrip strength (kg) | RT-HIIT | 29.30 ± 5.82 | 2.03 (0.95 to 3.11)* | 3.07 (1.12 to 5.02)* |
| AT-HIIT | 29.65 ± 4.57 | 0.19 (−1.13 to 1.50) | 1.31 (−0.66 to 3.28) | |
| UC | 29.64 ± 5.72 | −1.14 (−2.28 to 0.01) | Reference | |
| BMI (kg·m−2) | RT-HIIT | 24.22 ± 3.55 | 0.19 (−0.15 to 0.52) | −0.68 (−1.32 to −0.05)* |
| AT-HIIT | 24.22 ± 3.32 | 0.10 (−0.24 to 0.44) | −0.67 (−1.31 to −0.02)* | |
| UC | 24.73 ± 4.35 | 0.75 (0.26 to 1.24)* | Reference | |
Baseline values, within-group differences, and between-group differences were based on participants having baseline and postintervention measurements (RT-HIIT = 30, AT-HIIT = 27, UC = 29). For exercise effects on fatigue and physiological outcomes in the whole OptiTrain study population, we refer to the original publications (18,20).
*P < 0.05.