Table 3.
Number of players presenting with each flaw during the tuck jump assessment
| Tuck jump criteria | Boys (n = 46)a | Girls (n = 27) | ||
|---|---|---|---|---|
| Baseline | Follow-up | Baseline | Follow-up | |
| 1. Lower extremity valgus at landing | 20 (43%) | 26 (55%) | 19 (70%) | 20 (74%) |
| 2. Thighs do not reach parallel (peak of jump) | 28 (60%) | 31 (66%) | 20 (74%) | 19 (70%) |
| 3. Thighs not equal side-to-side (during flight) | 24 (51%) | 26 (55%) | 9 (33%) | 11 (41%) |
| 4. Foot placement not shoulder width apart | 29 (62%) | 29 (62%) | 13 (48%) | 11 (41%) |
| 5. Foot placement not parallel (front to back) | 12 (26%) | 10 (21%) | 5 (19%) | 8 (30%) |
| 6. Foot contact timing not equal | 3 (6%) | 3 (6%) | 0 (0%) | 1 (4%) |
| 7. Excessive landing contact noise | 9 (19%) | 12 (26%) | 16 (59%) | 10 (37%) |
| 8. Pause between jumps | 3 (6%) | 3 (6%) | 7 (26%) | 2 (7%)* |
| 9. Technique decline prior to 10 s | 4 (9%) | 5 (11%) | 8 (30%) | 1 (4%)* |
| 10. Does not land in same footprint | 29 (62%) | 30 (64%) | 19 (70%) | 17 (63%) |
| Tuck jump assessment total score median (IQR) | 3 (1) | 4 (2) | 4 (1) | 3 (2)* |
| Number of jumps mean ± SD | 15.5 ± 1.7 | 16.4 ± 2.0* | 15.1 ± 1.7 | 16.0 ± 1.1* |
Values are n (percent) or mean ± standard deviation
IQR interquartile range, SD standard deviation
*Indicates significantly different results (p < 0.05) compared to baseline
aOne player was missing from the assessment due to technical error when filming