Table 1.
Running mechanics during SSR-1 and SSR-2 in CON and HEAT at baseline and at four consecutive days (D1-POST to D4-POST) following exercise-induced muscle damage.
| Baseline |
D1-POST |
D2-POST | D3-POST |
D4-POST |
Main effects |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CON | HEAT | CON | HEAT | CON | HEAT | CON | HEAT | CON | HEAT | Time | Condition | Interaction | |
| SSR-1 | |||||||||||||
| tc (ms) | 340 ± 65 | 359 ± 36 | 342 ± 43 | 358 ± 38 | 344 ± 40 | 360 ± 42 | 341 ± 42 | 353 ± 50 | 344 ± 41 | 360 ± 37 | 0.737 | 0.727 | 0.971 |
| tf (ms) | 49 ± 33 | 32 ± 13 | 37 ± 22 | 32 ± 13 | 41 ± 24 | 36 ± 14 | 44 ± 24 | 42 ± 35 | 40 ± 26 | 34 ± 22 | 0.386 | 0.274 | 0.537 |
| Fzmax (kN) | 1.22 ± 0.11 | 1.16 ± 0.20 | 1.18 ± 0.15 | 1.16 ± 0.20 | 1.19 ± 0.15 | 1.18 ± 0.21 | 1.20 ± 0.15 | 1.21 ± 0.30 | 1.19 ± 0.15 | 1.18 ± 0.23 | 0.432 | 0.272 | 0.511 |
| Δz (cm) | 14.6 ± 5.4 | 15.9 ± 3.5 | 14.6 ± 3.8 | 15.8 ± 3.5 | 14.7 ± 3.5 | 16.0 ± 3.8 | 14.4 ± 3.6 | 15.5 ± 4.4 | 14.6 ± 3.6 | 16.2 ± 3.3 | 0.766 | 0.968 | 0.996 |
| ΔL (cm) | 24.5 ± 7.9 | 26.3 ± 4.3 | 24.4 ± 5.1 | 26.1 ± 4.6 | 24.8 ± 4.9 | 26.5 ± 5.1 | 24.3 ± 4.7 | 25.3 ± 6.3 | 24.6 ± 4.8 | 26.3 ± 4.9 | 0.770 | 0.931 | 0.997 |
| Kvert (kN m−1) | 9.8 ± 5.1 | 7.5 ± 1.6 | 8.6 ± 2.3 | 7.6 ± 1.7 | 8.5 ± 2.3 | 7.6 ± 2.0 | 8.8 ± 2.2 | 8.7 ± 4.7 | 8.5 ± 2.3 | 7.7 ± 2.3 | 0.543 | 0.311 | 0.474 |
| Kleg (kN m−1) | 5.7 ± 2.8 | 4.5 ± 0.7 | 5.0 ± 1.1 | 4.5 ± 0.9 | 5.0 ± 1.1 | 4.6 ± 1.0 | 5.1 ± 1.0 | 5.2 ± 2.8 | 5.0 ± 1.0 | 4.6 ± 1.3 | 0.549 | 0.315 | 0.486 |
| SSR-2 | |||||||||||||
| tr (ms) | 299 ± 40 | 299 ± 26 | 292 ± 41 | 298 ± 24 | 294 ± 41 | 295 ± 22 | 294 ± 44 | 296 ± 23 | 293 ± 43 | 280 ± 23 | 0.298 | 0.240 | 0.747 |
| tf (ms) | 64 ± 20 | 62 ± 29 | 72 ± 21 | 65 ± 28 | 72 ± 23 | 69 ± 30 | 72 ± 28 | 70 ± 33 | 74 ± 25 | 70 ± 33 | 0.103 | 0.753 | 0.915 |
| Fzmax (kN) | 1.29 ± 0.16 | 1.28 ± 0.16 | 1.33 ± 0.20 | 1.30 ± 0.19 | 1.33 ± 0.19 | 1.32 ± 0.24 | 1.33 ± 0.20 | 1.32 ± 0.22 | 1.34 ± 0.20 | 1.31 ± 0.21 | 0.156 | 0.759 | 0.902 |
| Δz (cm) | 11.1 ± 3.2 | 11.2 ± 1.8 | 10.5 ± 3.3 | 10.9 ± 1.9 | 10.9 ± 3.2 | 10.7 ± 0.2 | 10.7 ± 3.4 | 10.9 ± 0.2 | 10.8 ± 3.4 | 10.9 ± 0.2 | 0.325 | 0.692 | 0.785 |
| ΔL (cm) | 21.1 ± 5.9 | 22.2 ± 2.9 | 20.3 ± 6.2 | 21.8 ± 2.3 | 20.4 ± 6.0 | 21.5 ± 2.5 | 20.4 ± 6.1 | 21.7 ± 2.9 | 20.4 ± 6.3 | 22.1 ± 2.8 | 0.337 | 0.683 | 0.781 |
| Kvert (kN m−1) | 12.4 ± 3.1 | 11.8 ± 1.8 | 13.4 ± 3.7 | 12.1 ± 2.1 | 13.2 ± 3.4 | 12.5 ± 2.8 | 13.3 ± 4.0 | 12.4 ± 2.5 | 13.4 ± 3.9 | 12.2 ± 2.3 | 0.183 | 0.572 | 0.717 |
| Kleg (kN m−1) | 6.9 ± 3.2 | 5.8 ± 0.7 | 7.5 ± 3.6 | 5.9 ± 0.9 | 7.4 ± 3.7 | 6.2 ± 1.6 | 7.5 ± 4.1 | 6.2 ± 1.4 | 7.5 ± 3.9 | 6.0 ± 1.3 | 0.158 | 0.513 | 0.705 |
SSR-1 and SSR-2 were performed at running velocities corresponding to 90% of the first ventilatory threshold and 50% of the difference between their VO2max and first ventilatory threshold, respectively (CON; n = 8 and HEAT; n = 10 for both velocities). tc, contact time; tf, flight time; Fzmax, peak vertical ground reaction forces; Δz, center of mass vertical displacement; ΔL, maximum leg spring compression; Kvert, vertical stiffness; Kleg, leg stiffness.