How effective is progressive resistance strength training (PRT) for improving physical function in older adults?
The studies in this review were generally of poor methodological quality, as most did not use design features that are known to increase internal validity, such as concealed randomisation, intention-to-treat analysis, blinded outcome assessors, or attention control groups. In many studies adverse effects were poorly monitored. None the less, serious adverse events appeared to be rare. Additionally, there is no information regarding how long these effects can be maintained because the majority of the studies did not follow up the effect after the training had ended.
Progressive resistance strength training is a type of exercise where participants exercise their muscles against some type of resistance that is progressively increased as their strength improves. The exercise is usually conducted 2 to 3 times a week at moderate to high intensity, by using exercise machines, free weights or elastic bands.