Circuit strength training improves muscle strength, functional performance and anthropometric indicators in sedentary elderly women.

Abstract

This study aimed to investigate the effects of circuit strength training on the muscle strength, functional autonomy and anthropometric indicators of the elderly. Were included 65 women divided in two groups: strength training (TG, N.=34) and control group (CG, N.=31). The strength-training group was subjected to a circuit shaped training program, three days per week, for a period of 12 weeks. In each training session, the circuit was repeated three times. In each circuit, all exercises were performed once, with 8 to 12 repetitions per exercise, with 30-second intervals between each exercise. TG showed significantly changes in body composition post 12 weeks, as decreases in body weight (Δ-1.5±1.8 kg) and BMI (Δ-0.57±0.74 kg/m²), and decreases in abdominal (Δ-3±1.61 cm), waist (Δ-1 ± 1.61 cm), hip (Δ-2.75±1.44 cm) and waist-hip ratio circumference (Δ-0.02±0.15 cm). For functional autonomy, TG showed increases post 12 weeks by 30-second chair stand (Δ 3.5±0.4 reps), six minute walk (Δ60.95±7.91 m), back scratch (Δ3.2±1.36 cm), and time up and go tests (Δ-1.62±0,15 s). TG also showed increases in muscle strength post 12 weeks in both leg press (Δ11±1.29 kg) and lat pulldown (Δ11±0.75 Kg). For CG, body composition, functional autonomy and muscle strength did not improved in any moment. Hence, circuit strength training provides significant improvements in muscle strength, functional performance and anthropometric indicators in sedentary elderly women.