Table 2.
Markers of muscle fatigue before (pre training) and after a 4-day high-intensity interval training program (post training) as well as percentage changes of jump height and muscle contractile properties between testing days.
| Variable | Pre training | Post training | Pre–post training | ||
|---|---|---|---|---|---|
| %Δ ± Cl | P | d | |||
| PERFORMANCE MARKER | |||||
| CMJ (cm) | 40.2 ± 4.4 | 36.9 ± 4.6 | −8.1 ± 1.0 | <0.001 | −0.68 |
| SUBJECTIVE MARKERS | |||||
| DOMS (mm) | 0.4 ± 0.5 | 3.6 ± 1.9 | <0.001 | 3.62 | |
| SRSS PPC | 5.4 ± 0.8 | 3.6 ± 1.2 | <0.001 | −0.66 | |
| SRSS MS | 0.5 ± 0.8 | 3.2 ± 1.5 | <0.001 | 1.01 | |
| MUSCLE CONTRACTILE MARKERS | |||||
| Dm (mm) | 8.8 ± 1.9 | 8.1 ± 2.0 | −8.7 ± 0.9 | 0.178 | −0.35 |
| Tc (ms) | 31.3 ± 3.9 | 31.5 ± 4.6 | 0.2 ± 2.0 | 0.896 | 0.04 |
| V10 (mm·s−1) | 33.2 ± 3.9 | 30.4 ± 7.2 | −8.3 ± 3.8 | 0.225 | −0.32 |
| V90 (mm·s−1) | 137.9 ± 34.9 | 125.5 ± 29.6 | −8.6 ± 15.8 | 0.189 | −0.33 |
Data are shown as mean ± SD; Cl, 90% confidence limits; d, effect size; CMJ, countermovement jump; DOMS, delayed onset muscle soreness; SRSS, short recovery and stress scale; PPC, physical performance capability; MS, muscular stress; Dm, muscle belly displacement; Tc, contraction time; V10, rate of deformation development until 10% Dm; V90, rate of deformation development until 90% Dm.