Article

The purpose of this study was to investigate the relationship of
postural stability and lower extremity performance with core stability, knee
laxity, and muscle strength in patients with anterior cruciate ligament
reconstruction. DESIGN: Twenty-eight anterior cruciate ligament-reconstructed
subjects were included in the study. Anterior knee laxity tests, isokinetic knee
muscle strength tests, and core stability tests were performed. Single-limb
postural stability was assessed in both eyes-open and eyes-closed positions on a
static surface and an eyes-open condition on a foam surface. A single-legged hop
test was performed to assess lower extremity performance. To detect differences
between the operated and healthy leg, a Mann-Whitney U test was performed, and a
correlation analysis was performed using the Spearman correlation coefficient.
RESULTS: Knee muscle strength and laxity were different between the operated and
healthy legs (P < 0.05). Postural stability scores correlated with core stability
tests (P < 0.05) in both the operated and healthy legs. In the operated leg, knee
laxity and muscle strength correlated with the mediolateral sway index on a foam
surface (P < 0.05). Knee flexor and extensor muscle strength correlated with the
single-legged hop for both legs (P < 0.05). CONCLUSIONS: Decreased core
stability, decreased knee muscle strength, and increased knee laxity correlated
with single-limb postural stability. Better hop performance was demonstrated with
better knee flexor and extensor muscle strength and was independent from core
stability.

Langue : ANGLAIS