Kinematics | Takeoff | Landing | ||
HP | PIP | HP | PIP | |
Jump height (cm) | 59.0 (6.9) | 62.4 (8.6) | 57.8 (5.8) | 60.1 (7.2) |
Plantar flexioni (°) | — | — | −41.8 (6.5) | −34.9 (7.0) |
Knee flexioni (°) | — | — | −19.1 (7.7) | −17.7 (7.2) |
Ankle flexion VGRF (°) | — | — | 2.1 (8.8) | −1.3 (5.9) |
Knee flexion VGRF (°) | — | — | −46.6 (11.9) | −36.8 (8.6) |
Ankle ROMi (°) | — | — | 44.0 (13.5) | 33.6 (11.3) |
Knee ROMi (°) | — | — | −27.5 (8.0) | −19.1 (7.5) |
Maximum plantar flexion (°) | −41.9 (4.5) | −45.1 (5.1) | — | — |
Maximum dorsal flexion (°) | 12.3 (4.8) | 13.1 (2.8) | 14.1 (6.0) | 16.4 (6.1) |
Maximum knee flexion (°) | −84.0 (8.4) | −83.8 (2.9) | −83.4 (14.7) | −83.8 (8.2) |
Ankle ROM (°) | 54.2 (5.7) | 58.1 (5.2) | 56.0 (9.9) | 51.3 (11.6) |
Knee ROM (°) | −71.2 (7.4) | −75.4 (7.6) | −64.3 (11.7) | −66.1 (6.1) |
Ankle angular velocity/(g×l0)½ | −5.5 (0.7) | −5.8 (0.8) | 7.2 (1.1) | 7.0 (1.0) |
Knee angular eccentric velocity/(g×l0)½ | −2.7 (0.6) | −3.0 (0.4) | −4.3 (0.6) | −5.0 (0.8) |
Knee angular concentric velocity/(g×l0)½ | 5.8 (0.9) | 6.1 (0.4) | — | — |
HP, healthy players; g, gravity; i, at the time of touch-down at landing; l0, leg length; PIP, previously injured players; ROMi, range of motion from the time of touch-down until the time of peak vertical ground reaction force; VGRF, at the time of peak vertical ground reaction force.
Data are mean (SD).