Exercising with reserve: exercise regulation by perceived exertion in relation to duration of exercise and knowledge of endpoint

Author: Swart, J.; Lamberts, R.P.; Lambert, M.I.; Lambert, E.V.; Woolrich, R.W.; Johnston, S.; Noakes, T.D.

Description: OBJECTIVE: The purpose of this study was to examine ratings of perceived exertion (RPE) and performance during repetitive maximal effort 40 km time trials as well as after an intervention that aimed to decrease certainty about the remaining distance of the exercise bout. In addition, we examined the RPE during exercise bouts of markedly different duration.

METHODS: Part 1: 12 well-trained, competitive-level cyclists completed five 40 km time trials. During the final time trial all feedback was withheld until the final kilometer. In addition, to cause confusion about the remaining distance, they were asked to report their RPE at random intervals from 18 km to 38 km.

Part 2: 6 well-trained, recreation-level cyclists randomly completed a 5 km, 10 km, 40 km and 100 km time trial.

RESULTS: Part 1: Mean RPE increased during the first four trials and decreased during the final trial. The rate of RPE progression increased in linearity during the first four trials and became more conservative in the final trial. These changes were directly related to performance.

Part 2: Mean RPE for longer duration trials (40 km, 100 km) were lower during the first half of trial duration but matched those of shorter trials in the final 20%.

CONCLUSIONS: Increased familiarity of the exercise bout and certainty about its endpoint are associated with a more aggressive RPE strategy that produces a superior exercise performance. Certainty about the endpoint and the duration of exercise affect both the RPE strategy and performance.

Subject headings: Adult; Athletic Performance–physiology; Bicycling–physiology; Energy Metabolism–physiology; Exercise–physiology, psychology; Exercise Test; Humans; Learning–physiology; Male; Oxygen Consumption–physiology; Perception; Physical Endurance–physiology; Physical Exertion–physiology

Publication year: 2009

Journal or book title: British Journal of Sports Medicine

Volume: 43

Issue: 10

Pages: 775-781

Find the full text : https://bjsm.bmj.com/content/43/10/775.short

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Type: Journal Article

Serial number: 47