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Variability in submaximal self-paced exercise bouts of different intensity and duration

O'Grady, Ciaran, Passfield, Louis, Hopker, James G. (2021) Variability in submaximal self-paced exercise bouts of different intensity and duration. International Journal of Sports Physiology and Performance, . ISSN 1555-0265. (doi:10.1123/ijspp.2020-0785) (KAR id:87830)

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https://doi.org/10.1123/ijspp.2020-0785

Abstract

Purpose: Rating of perceived exertion (RPE) as a training-intensity prescription has been extensively used by athletes and coaches. However, individual variability in the physiological response to exercise prescribed using RPE has not been investigated. Methods: Twenty well-trained competitive cyclists (male = 18, female = 2, maximum oxygen consumption =55.07 [11.06] mL·kg−1·min−1) completed 3 exercise trials each consisting of 9 randomized self-paced exercise bouts of either 1, 4, or 8 minutes at RPEs of 9, 13, and 17. Within-athlete variability (WAV) and between-athletes variability (BAV) in power and physiological responses were calculated using the coefficient of variation. Total variability was calculated as the ratio of WAV to BAV. Results: Increased RPEs were associated with higher power, heart rate, work, volume of expired oxygen (VO2), volume of expired carbon dioxide (VCO2), minute ventilation (VE), deoxyhemoglobin (ΔHHb) (P < .001), and lower tissue saturation index (ΔTSI%) and ΔO2Hb (oxyhaemoglobin; P < .001). At an RPE of 9, shorter durations resulted in lower VO2 (P < .05) and decreased ΔTSI%, and the ΔHHb increased as the duration increased (P < .05). At an RPE of 13, shorter durations resulted in lower VO2, VE, and percentage of maximum oxygen consumption (P < .001), as well as higher power, heart rate, ΔHHb (P < .001), and ΔTSI% (P < .05). At an RPE of 17, power (P < .001) and ΔTSI% (P < .05) increased as duration decreased. As intensity and duration increased, WAV and BAV in power, work, heart rate, VO2, VCO2, and VE decreased, and WAV and BAV in near-infrared spectroscopy increased. Conclusions: Self-paced intensity prescriptions of high effort and long duration result in the greatest consistency on both a within- and between-athletes basis.

Item Type: Article
DOI/Identification number: 10.1123/ijspp.2020-0785
Uncontrolled keywords: endurance training; individual variability; effort-based training; cycling training; measurement error
Subjects: G Geography. Anthropology. Recreation > GV Recreation. Leisure > Sports sciences
Divisions: Divisions > Division of Natural Sciences > School of Sport and Exercise Sciences
Depositing User: James Hopker
Date Deposited: 04 May 2021 07:47 UTC
Last Modified: 18 Jun 2021 15:22 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/87830 (The current URI for this page, for reference purposes)
Passfield, Louis: https://orcid.org/0000-0001-6223-162X
Hopker, James G.: https://orcid.org/0000-0002-4786-7037
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