Effects of resistance training, detraining, and retraining on strength and functional capacity in elderly

BackgroundThe interruption of training (detraining) results in loss of the gains acquired. Partial retention could occur after detraining, and variation in training stimuli may optimize retraining adaptations.AimTo evaluate the effect of a resistance-retraining program on strength and functional capacity performance after a detraining period.MethodsTen elderly men and women (63-68years) completed 12weeks of training, 16weeks of detraining, and 8weeks of retraining. One-repetition maximum (1-RM) at 45 degrees leg press, maximum isometric knee extension torque, rate of torque development (RTD), 30-ssit-to-stand, timed up and go, and stair ascent and descent tests were assessed.ResultsThe 1-RM increased after training (p<0.01) and remained higher after a detraining period when compared to pre-training (p<0.01). Post-retraining values were not different from post-training period (p>0.05). For RTD and 30-ssit-to-stand, there was an increase after retraining when compared to pre-training values (p<0.05). For timed up and go and stair ascent and descent, reductions were observed between pre-training and post-training periods (p<0.05), only timed up and go increased after the detraining period (p<0.01).DiscussionAfter 16weeks of detraining, the maximum strength did not return to baseline levels, and a retraining with explosive strength exercise sessions can recover maximum strength gains, RTD, and functional capacity at the same level obtained after a detraining period.ConclusionsThe inclusion of an explosive strength session in retraining period improves RTD and 30-ssit-to-stand performance and can accelerate the recovery of strength after a detraining period.