Acute affective and perceptual responses to resistance training with imposed and self-selected load in chronic kidney disease patients

Abstract

Introduction: Resistance training (RT) has shown several benefits for chronic kidney disease (CKD) patients. The affective and perceptual responses to training may influence the initial adherence to the program. Objective: To compare the acute affective and perceptual responses to RT protocols with imposed or self-selected loads in patients undergoing conservative treatment for CKD. Methods: Fourteen elderly (66.7 ± 3.0 years old) with CKD stage 3 or 4 completed two different protocols in a randomized crossover approach: with load at 70% of one maximum repetition (70% 1RM) and self-selected load. The affective valence and rating of perceived exertion (RPE) scales were used between each exercise (total of 10 exercises), and session RPE (sRPE) was measured 30 minutes after the training session. Results: The results demonstrated that when patients self-selected loads, the relative load was lower (~50% 1RM) compared to the protocol with imposed loads. More positive affective responses were found in the session with a self-selected load, as well as lower values of RPE and sRPE. Conclusion: The results of the present work suggest that self-selected loads may be an interesting strategy to improve the affective response to RT, and that this is probably mediated by a lower RPE in elderly CDK patients undergoing conservative treatment.