Table 2.
Kinematic variables for the hip and knee in the frontal plane. Values expressed as mean (SD).
| Variable | DVJ |
SSVJ |
Effect Size (d) |
||||
|---|---|---|---|---|---|---|---|
| Land 1 | Land 2 | Land 1 | Land 2 | Jump | Landing | ||
| HIP | Hip ROM (°) | 7.31 (4.27) | 4.41 (1.46) | 9.06 (4.30) | 3.33 (2.76) | 0.105 | 1.278∗ |
| Hip peak abduction angle (°) | −10.75 (5.20) | −8.53 (4.73) | −11.30 (3.97) | −7.73 (4.06) | 0.027 | 0.645∼ | |
| Hip abduction angle @ IC (°) | −11.98 (7.62) | −7.26 (3.86) | −12.35 (6.10) | −7.00 (4.65) | 0.009 | 0.881∗ | |
| KNEE | Knee ROM (°) | 10.76 (6.58) | 9.78 (6.29) | 11.45 (6.37) | 8.98 (5.40) | 0.008 | 0.280ˆ |
| Knee peak adduction angle (°) | 7.13 (7.15) | 5.58 (6.11) | 6.47 (6.35) | 4.29 (5.53) | 0.154 | 0.296ˆ | |
| Knee peak abduction angle (°) | −3.62 (10.15) | −4.20 (9.78) | −4.98 (9.93) | −4.69 (8.30) | 0.096 | 0.015 | |
| Knee abduction angle @ peak knee flexion (°) | 0.10 (11.36) | −0.18 (10.33) | −2.30 (11.38) | −1.91 (9.58) | 0.194 | 0.006 | |
Abbreviations.
SD: standard deviation; DVJ: drop vertical jump; SSVJ: soccer-specific vertical jump; ROM: range of motion; IC: initial contact.
Bold indicates significance (p < 0.05).
Effect size calculated as Cohen's d.
∗Large effect size (≥ 0.8).
∼Medium effect size (0.5–0.8).
ˆSmall effect size (0.2–0.5).