Table 1.
Anthropometric and physiological characteristics of participants before and after 8 weeks of exercise training.
| HIIT (n = 25) | SIT (n = 24) | Between groups (Pre) | Between groups (Pre-Post) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pre | Post | ES | P | Pre | Post | ES | P | P | P | |
| Age (years) | 31.0 ± 6.0 | – | – | – | 29.8 ± 6.4 | – | – | – | 0.823 | – |
| Height (m) | 1.63 ± 0.05 | – | – | – | 1.64 ± 0.05 | – | – | – | 0.814 | – |
| HRpeak (beats/min) | 182 ± 10 | – | – | – | 179 ± 13 | – | – | – | 0.021 | – |
| Body mass (kg) | 66.3 ± 10.2 | 65.9 ± 9.9 | −0.039(trivial) | 0.280 | 67.8 ± 8.1 | 67.0 ± 8.1 | −0.098(trivial) | 0.015 | 0.156 | 0.360 |
| Body mass index (kg.m−2) | 24.5 ± 3.3 | 24.4 ± 3.2 | −0.030(trivial) | 0.402 | 25.2 ± 3.2 | 24.9 ± 3.3 | −0.092(trivial) | 0.019 | 0.950 | 0.293 |
| Skinfolds (mm) | ||||||||||
| Triceps | 22.0 ± 6.3 | 18.8 ± 5.2 | −0.553(medium) | < 0.001 | 27.6 ± 7.7 | 22.8 ± 5.6 | −0.712(medium) | < 0.001 | 0.213 | 0.909 |
| Subscapular | 21.2 ± 9.9 | 17.3 ± 7.3 | −0.448(small) | < 0.001 | 27.4 ± 8.6 | 20.3 ± 5.8 | −0.967(large) | < 0.001 | 0.393 | 0.074 |
| Suprailiac | 21.0 ± 11.2 | 17.4 ± 8.8 | −0.357(small) | < 0.001 | 30.4 ± 8.3 | 23.2 ± 5.3 | −1.033(large) | < 0.001 | 0.084 | 0.374 |
| Abdominal | 25.0 ± 11.2 | 19.7 ± 8.5 | −0.533(medium) | < 0.001 | 35.5 ± 6.9 | 25.8 ± 4.7 | −1.643(large) | < 0.001 | 0.029 | 0.111 |
| Thigh | 32.7 ± 8.6 | 28.2 ± 7.7 | −0.551(medium) | < 0.001 | 38.3 ± 7.9 | 30.7 ± 6.8 | −1.031(large) | < 0.001 | 0.883 | 0.020 |
| ∑skinfolds (mm) | 121.9 ± 43.8 | 101.4 ± 34.6 | −0.519(medium) | < 0.001 | 159.1 ± 35.1 | 122.8 ± 24.8 | −1.194(large) | < 0.001 | 0.310 | 0.045 |
| Waist circumference (cm) | 74.6 ± 8.0 | 72.3 ± 7.8 | −0.291(small) | < 0.001 | 77.6 ± 7.0 | 75.1 ± 6.8 | −0.362(small) | < 0.001 | 0.483 | 0.739 |
| VO2peak (mL.kg−1.min−1) | 37.7 ± 7.2 | 42.1 ± 5.5 | 0.686(medium) | < 0.001 | 32.0 ± 7.2 | 36.5 ± 6.7 | 0.647(medium) | < 0.001 | 0.860 | 0.097 |
| iVO2peak (watts) | 159 ± 31 | 167 ± 27 | 0.275(small) | 0.028 | 138 ± 26 | 149 ± 20 | 0.474(small) | 0.003 | 0.303 | 0.402 |
Data are expressed as means ± standard deviation. p (values) for within-group (time) effect and interaction (time × group) effect. ES, effect size; HIIT, high-intensity interval training; SIT, sprint interval training; HRpeak, peak heart rate; ∑Skinfolds, sum of five skinfolds; VO2peak, peak oxygen uptake; iVO2peak, intensity associated to peak oxygen uptake.