The Relationship of Anatomical Alignment and Strength of Some Lower Extremity Muscles with Jump-landing Biomechanics: A Landing Error Scoring System Study

The purpose of the present study was to investigate correlative and predictive relationship of lower extremity anatomical alignment, isometric hip abduction and external rotation strength with jump-landing biomechanics using Landing Error Scoring System (LESS).
Anatomical alignment and isometric lower extremity muscle strength of 30 active men (mean age of 21.27±2.12 years) have been assessed through goniometry and dynamometry tests, respectively. Then, subjects have performed LESS test for the analysis of their jump-landing biomechanics.
There was no significant correlative or predictive relationship between overall LESS score and femoral anteversion angle, tibiofemoral angle, Q angle, navicular drop, tibial torsion, abduction and external rotation isometric strength (P>.05). However, statistically significant negative correlation has been found between knee hyperextension angle and LESS score (P= .01, r= -.4).
The findings of the present study showed that lower extremity anatomical alignment and isometric strength measurements has no significant relationship with dynamic biomechanics of jump-landing. This is probably due to the difference in nature of static and isometric measurements and dynamic functional movements.