Identifying recreational physical activities associated with muscle quality in men and women aged 50?years and over

摘要

BackgroundSeveral studies conducted in a laboratory-related environment have shown that exercise is associated with increased muscle quality in older adults. The aim of the present study was to investigate whether recreational exercise may also be associated with muscle quality in men and women aged 50?years and over.MethodsData are from 312 individuals (215 women) aged 50?years and older. Body composition (dual-energy X-ray absorptiometry) and knee extension strength (KES) of the right leg (one repetition maximum) were assessed. Muscle quality (MQ) (KES/right lower limb lean mass) was calculated. Recreational exercises (duration and weekly amount) were determined by structured interview.ResultsThe duration of the period during which participants practiced resistance activities was the only predictor of MQ (p?=?0.018) and explained an additional 1.6?% of the variance in MQ, after controlling for age and gender. Furthermore, the weekly amount of practice of aerobic activities significantly interacted with age (p?