The authors compared the effects of bodyweight resistance training at moderate- or high-speed conditions on muscle power, velocity of movement, and functional performance in older females. In a randomized, single-blinded noncontrolled trial, participants completed 12 weeks (three sessions/week) of bodyweight resistance training at high (n = 14; age = 70.6 ± 4.3 years) or moderate (n = 12; age = 72.8 ± 4.2 years) speeds. Data were analyzed with an analysis of variance (Group × Time) with α level set at <.05. After the intervention, timed up and go test performance (p < .05) and the rising from a chair test mean (22.4%) and maximal velocity (28.5%), mean (24.4%) and maximal power (27.7%), normalized mean (25.1%), and normalized maximal power (28.5%) increased in the high-speed group (p < .05). However, the moderate-speed group achieved no improvements (Δ6.7–14.4%; p > .2). The authors conclude that high-speed bodyweight resistance training is an effective and economically practical strategy to improve the functional capacity of older women relevant to daily life activities.
Jaque and Véliz are with the Magíster en Fisiología Clínica del Ejercicio, Facultad de Ciencias, Universidad Mayor, Santiago, Chile. Jaque is also with the Centro de Ciencias Básicas, Facultad de Ciencias de la Salud, Universidad Central de Chile, Santiago, Chile. Ramirez-Campillo is with the Laboratory of Human Performance, Quality of Life and Wellness Research Group, Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile. Moran is with the School of Sport, Rehabilitation, and Exercise Sciences, University of Essex, Colchester, United Kingdom. Gentil is with the Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiania, Brazil. Cancino is with the Laboratorio de Ciencias del Ejercicio, Escuela de Kinesiología, Facultad de Medicina, Universidad Finis Terrae, Santiago, Chile.