Table 3.
Ankle angle, angular velocity, performance, and joint stiffness during jumping tests for plyometric and isometric training protocols [mean (SD)]
| Plyometric training | Isometric training | ||||
|---|---|---|---|---|---|
| Before | After | Before | After | ||
| Ankle angle at the lowest position (deg) | noCMJ | −24.0 (7.4) | −23.3 (5.3) | −23.7 (6.2) | −25.8 (4.4) |
| CMJ | −23.6 (7.1) | −25.3 (8.0) | −24.7 (5.9) | −25.5 (3.4) | |
| DJ | −20.5 (7.8) | −19.3 (8.5) | −18.9 (8.2) | −20.8 (7.5) | |
| Angular velocity during eccentric phase (deg·s−1) | CMJ | 73.5 (13.2) | 82.1 (15.2) | 81.0 (15.7) | 82.6 (13.0) |
| DJ | 153.4 (30.1) | 145.0 (17.8) | 167.1 (58.7) | 153.0 (43.1) | |
| Angular velocity during concentric phase (deg·s−1) | noCMJ | 106.6 (24.9) | 127.1 (23.8) | 108.3 (20.9) | 118.7 (23.0)* |
| CMJ | 122.5 (17.5) | 132.7 (16.0) | 134.2 (12.8) | 138.7 (12.9) | |
| DJ | 171.6 (52.3) | 182.5 (45.8) | 190.5 (50.0) | 193.4 (41.4) | |
| Jump height (cm) | noCMJ | 16.4 (4.4) | 25.0 (4.6)*** | 17.1 (4.5) | 20.0 (3.3)* |
| CMJ | 19.1 (3.5) | 28.3 (4.1)*** | 20.7 (5.1) | 23.3 (3.0) | |
| DJ | 19.4 (5.4) | 27.1 (4.5)*** | 19.6 (4.9) | 21.7 (3.7) | |
| Joint stiffness (Nm·deg−1) | DJ | 6.52 (2.00) | 8.28 (2.06)** | 6.98 (2.44) | 7.80 (2.75) |
Significantly different from before (*P < 0.05, **P < 0.01, ***P < 0.001). noCMJ, no‐counter‐movement jump; CMJ, counter‐movement jump; DJ, drop jump.