Table 2.
Comparison of countermovement jump variables according to competitive level.
| Dependent variable (units) | EMMeans (95% CI) | ES (95% CI) | Interpretation | p value | |
|---|---|---|---|---|---|
| PRO | SEMI-PRO | ||||
| Jump height (cm) | 36.6 (35.1; 38.1) | 35.9 (34.3; 37.5) | 0.16 (−0.33; 0.66) | Trivial | 0.516 |
| RSImod (m/sec) | 0.514 (0.483; 0.546) | 0.506 (0.473; 0.540) | 0.09 (−0.41; 0.58) | Trivial | 0.726 |
| Eccentric (“downward”) phase | |||||
| Braking duration -Contraction Time | 40.4 (38.6; 42.2) | 41.1 (39.1; 43.1) | 0.14 (−0.35; 0.64) | Trivial | 0.577 |
| COM Displacement (cm) | 32.7 (34.3; 31.2) | 28.9 (30.6; 27.3) | 0.83 (0.31; 1.34) | Moderate | 0 . 002 * |
| Dec duration (ms) | 173 (161; 185) | 155 (142; 168) | 0.51 (0.01; 1.01) | Small | 0.050 |
| Duration (ms) | 487 (461; 514) | 476 (447; 504) | 0.15 (−0.34; 0.65) | Trivial | 0.544 |
| Peak Force ABS (N) | 1,790 (1,702; 1,877) | 1,771 (1,678; 1,864) | 0.07 (−0.42; 0.57) | Trivial | 0.774 |
| Peak Force REL (N) | 23.6 (22.7; 24.5) | 24.0 (23.1; 25.0) | 0.15 (−0.35; 0.64) | Trivial | 0.560 |
| Peak Power ABS (W) | 1,449 (1,315; 1,584) | 1,211 (1,067; 1,356) | 0.61 (0.10; 1.11) | Moderate | 0.019* |
| Peak Power REL (W) | 19.1 (17.4; 20.9) | 16.5 (14.6; 18.4) | 0.52 (0.01; 1.02) | Small | 0.046* |
| Peak Velocity (m/s) | 1.32 (1.38; 1.25) | 1.18 (1.25; 1.11) | 0.76 (0.25; 1.27) | Moderate | 0.004* |
| Concentric (“upward”) phase | |||||
| Duration (ms) | 262 (251; 273) | 249 (237; 261) | 0.41 (−0.03; 0.91) | Small | 0.107 |
| Peak Force ABS (N) | 1,857 (1,777; 1,937) | 1,836 (1,751; 1,921) | 0.09 (−0.40; 0.59) | Trivial | 0.719 |
| Peak Force REL (N) | 24.5 (23.8; 25.3) | 24.9 (24.1; 25.8) | 0.18 (−0.31; 0.68) | Trivial | 0.475 |
| Peak Power ABS (W) | 4,041 (3,866; 4,216) | 3,930 (3,745; 4,114) | 0.22 (−0.27; 0.72) | Small | 0.384 |
| Peak Power REL (W) | 53.3 (51.5; 55.2) | 53.5 (51.6; 55.4) | 0.03 (−0.46; 0.53) | Trivial | 0.898 |
| Peak Velocity (m/s) | 2.79 (2.74; 2.84) | 2.77 (2.71; 2.82) | 0.13 (−0.36; 0.62) | Trivial | 0.609 |
ABS, absolute; CI, Confidence Interval; COM, center of mass; Dec, deceleration; ES, effect size; EMMeans, estimated marginal means; REL, relative; RSImod, reactive strength index modified.
*Bolded p value indicates statistically significant difference (p < 0.05).