Efeito da suplementação de creatina associada a um programa de treinamento físico resistido sobre massa magra, força e massa óssea em idosos

Abstract

The aim of this study was to examine the efficacy of creatine supplementation associated with resistance training on lean mass, strength and bone mass in the elderly. This was a 12-week, parallel-group, double-blind, randomized, placebocontrolled trial. The individuals were randomly allocated into one of the following groups: placebo plus resistance training (PL + RT) and creatine supplementation plus resistance training (CR + RT). The participants were assessed at baseline and after 12 weeks. The primary outcomes were lean mass and strength, assessed by dual energy X-ray absorptiometry (DXA) and ten-repetition maximal (10RM) tests, respectively. Secondary outcomes included lumbar spine, right and left femoral neck, dual femur and whole body bone mineral density and whole body bone mineral content, assessed by DXA. The CR+RT group had superior gain in lean mass when compared with the PL+RT group (p = 0.02). Changes in 10RM tests in bench press and leg press exercises, body composition, bone mineral density and content of all assessed sites did not significantly differ between the groups (p > 0.05). In conclusion, 12 weeks of creatine supplementation associated with resistance training resulted in increased lean mass.