TABLE 4.
Hematological variables
| HIIT 4 × 4 min (n = 10) | SIT 8 × 20 s (n = 12) | SIT 10 × 30 s (n = 9) | ||||
|---|---|---|---|---|---|---|
| Pre | Post | Pre | Post | Pre | Post | |
| Erythrocytes (1012 L−1) | 5.06 ± 0.21 | 5.14 ± 0.32 | 5.09 ± 0.31 | 5.14 ± 0.29 | 5.25 ± 0.28 | 5.28 ± 0.32 |
| Hemoglobin (g dl−1) | 15.11 ± 0.29 | 15.20 ± 0.82 | 15.28 ± 0.48 | 15.18 ± 0.44 | 15.47 ± 0.78 | 15.48 ± 0.79 |
| Hematocrit (%) | 44.1 ± 1.7 | 44.7 ± 2.8 | 44.4 ± 1.8 | 45.1 ± 1.9 | 45.8 ± 1.8 | 46.2 ± 2.0 |
| MCV (fL) | 87 ± 2 | 87 ± 2 | 87 ± 3 | 88 ± 3 | 87 ± 3 | 87 ± 3 |
| MCH (pg) | 29.9 ± 1.4 | 29.6 ± 0.9 | 30.1 ± 1.1 | 29.6 ± 1.0* | 29.5 ± 1.1 | 29.4 ± 0.9 |
| Bicarbonate (mM) | 26.71 ± 0.95 | 28.57 ± 1.72** aa,bb | 28.00 ± 1.41 | 28.25 ± 1.16 | 28.56 ± 1.42§ | 27.78 ± 1.92 |
Note: Data are presented as mean ± SD. 4 × 4 min, 4 × 4 min running at ~95% of maximal aerobic speed (MAS) interspersed by 3 min active recovery; 8 × 20 s, 8 × 20 s exhaustive running at ~150% of MAS interspersed by 10 s passive recovery; 10 × 30 s, 10 × 30 s maximal running (average of ~175% MAS) interspersed by 3.5 min active recovery; MCV, mean corpuscular volume; MCH, mean corpuscular hemoglobin. Significant different change from pre‐ to posttest; within group (*p ≤ 0.05, **p ≤ 0.01), compared to 10 × 30 s (aa p ≤ 0.01), compared to 8 × 20 s (bb p ≤ 0.01). Significantly different from 4 × 4 at baseline §p ≤ 0.05.