Differences in muscle strength in dominant and non-dominant leg in females aged 20-39 years--a population-based study.

Objective: In sports medicine, muscle strength and joint flexibility of the contralateral limb is used as a rehabilitation goal for the injured extremity. The present study was designed to determine whether side differences in hamstrings and quadriceps muscle strength, or in the ratio between hamstrings and quadriceps strength (H:Q), might be of clinical importance.

Design: Cross-sectional study in a randomly selected, population-based cohort.