TABLE 5.
EFFECTS OF PLYOMETRIC TRAINING ON VERTICAL LANDING FORCE, JUMP HEIGHT, RANGE OF KNEE FLEXION, AND LANDING TIME IN DROP JUMP (DJ) FROM HEIGHT OF 60 CM. DATA ARE PRESENTED AS THE MEAN (± SD) AND EFFECT SIZE (ES)
| Test | Parameter | Group | Pre | Post | Change | ES | |
|---|---|---|---|---|---|---|---|
| Absolute | % | ||||||
| DJ60 | GRF/BW (NN-1) | SJG | 5.87 ± 0.61 | 6.26 ± 0.56*‡ | 0.39 | 6.6 | 0.6 |
| RJG | 5.91 ± 0.77 5 | .59 ± 0.72*†‡ | -0.32 | -5.4 | 0.5 | ||
| CON | 5.94 ± 0.63 | 5.98 ± 0.73 | 0.04 | 0.7 | 0.1 | ||
| h (cm) | SJG | 35.5 ± 6.4 | 39.6 ± 5.9‡ | 4.1 | 11.6 | 0.7 | |
| RJG | 35.8 ± 6.9 | 40.8 ± 5.6*‡ | 5.0 | 14.1 | 1.0 | ||
| CON | 35.1 ± 5.2 | 35.5 ± 0.06 | 0.4 | 1.0 | 0.1 | ||
| KF (°) | SJG | 82.3 ± 5.4 | 81.5 ± 4.8 | -0.8 | -1.0 | 0.1 | |
| RJG | 81.2 ± 5.7 | 83.6 ± 4.3* | 2.4 | 3.0 | 0.4 | ||
| CON | 82.7 ± 6.1 | 83.4 ± 6.3 | 0.7 | 0.8 | 0.1 | ||
| LT (s) | SJG | 0.178 ± 0.014 | 0.161 ± 0.021*‡ | -0.017 | -9.5 | 1.1 | |
| RJG | 0.169 ± 0.020 | 0.187 ± 0.015*†‡ | 0.018 | 10.6 | 1.1 | ||
| CON | 0.172 ± 0.016 | 0.178 ± 0.013 | 0.006 | 3.5 | 0.4 | ||
Note: DJ60 = drop jump from height of 0.6 m; VGRF = vertical landing force; h = jump height; KF = range of knee flexion during landing; LT = landing time. SJG = single jump group; RJG = repeated jumps group; CON = control group.
*
Significant difference from pre-training values (p < 0.01).
†
Significantly different change than in SJG (p < 0.05).
‡
Significantly different change than in CON (p < 0.05)