Prediction of one-repetition maximum from submaximal ratings of perceived exertion in older adults pre- and post-training.

Background: Individual's one-repetition maximum (1-RM) is required to calculate and prescribe intensity for resistance training, while testing protocols enhance the risk of injuries and are time-consuming.

Aims: The aim of the present study was to assess the accuracy of 1-RM prediction from ratings of perceived exertion (RPE) of resistance exercises performed at submaximal sets (intensity and volume) in older adult males before and after a 12-week rehabilitation program.

Methods: 18 untrained subjects (70.