Physical work capacity and body composition

Capacidad física de trabajo y composición corporal

Introduction: physical work capacity (PWC) is described as the set of tasks used to perform daily living activities compared to healthy individuals; PWC is assessed by hand grip force and abdominal muscle endurance, balance, flexibility, gait speed and aerobic capacity.  Therefore, PWC and skeletal muscle mass index (SMI) are related to each other and may be improved by exercise training. Objective: to determine whether a supervised and controlled training program once a week for six months is effective in changing PWC and SMI in subjects over 18 years of age. Methods: a retrospective analytical, cohort observational study of 565 patients who attended a supervised and controlled training program once a week for six months.  Results: at the end of the intervention, mean PWC improved by -8.59 points (P=0.000) and SMI increased by -0.06 points (P=0.002). Conclusions: this study suggests that a one-hour, guided and supervised training program intervention provides beneficial effects in PWC variables and enhances SMI, which is explained by changes in the microstructure of skeletal muscle (improvement in the capacity to perform work per unit of muscle mass).

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