Table 2.
Influence of quadriceps strength, anterior knee laxity, and pre-injury activity level on hop test performance.
| R2 | R2 Change | Beta Coefficienta | F Change | Sig. F Change | ||
|---|---|---|---|---|---|---|
| Single Hop | ||||||
| Quadriceps Strengthb | .069 | .069 | + | 22.884 | <.001* | |
| Activity Levelc | .074 | .005 | - | 1.570 | .211 | |
| Laxityd | .076 | .002 | - | .658 | .418 | |
| Triple Hop | ||||||
| Quadriceps Strength | .043 | .043 | + | 13.891 | <.001* | |
| Activity Level | .044 | .001 | + | .094 | .760 | |
| Laxity | .047 | .003 | - | 1.211 | .272 | |
| Cross-Over Hop | ||||||
| Quadriceps Strength | .075 | .075 | + | 24.969 | <.001* | |
| Activity Level | .076 | .001 | + | .102 | .749 | |
| Laxity | .077 | .001 | - | .523 | .470 | |
| Timed Hop | ||||||
| Quadriceps Strength | .038 | .038 | + | 12.146 | .001* | |
| Activity Level | .038 | .000 | - | .009 | .923 | |
| Laxity | .046 | .008 | - | 2.605 | .108 |
a
Relationship between dependent and independent variables
b
% MVIC
c
Pre-injury IKDC classification
d
Side-to-side difference in anterior knee laxity using manual, maximum pull with KT-2000 arthrometer
*
Statistically significant (P<.01)