Brief summary, from the abstract
Across 41 studies, hip strength showed little to no relationship with how the hip and knee move during single-leg tasks, suggesting isometric hip strength may matter less for controlling lower-limb motion than commonly assumed.
- Pooled 41 studies (33 in uninjured participants, 12 in injured participants).
- Moderate-to-strong evidence found no-to-poor relationships between most hip strength measures and hip and knee kinematics: uninjured r = -0.33 to 0.45, injured r = -0.24 to 0.24.
- One exception: concentric and eccentric hip abduction strength showed a fair-to-moderate negative relationship with hip adduction (r = -0.52), hinting isokinetic strength may be a better indicator than isometric.
- Findings come from a systematic review with meta-analysis, but the wide correlation ranges reflect varied study methods and populations.
Clinically assessing this area? See the knee special tests.