Abstract

The aims of this study were to investigate the influence of reduced-exertion, high-intensity interval training (REHIT), comparing a novel shortened-sprint protocol (SSREHIT) against a traditional protocol (TREHIT), on perceptual responses and to determine if changes in peak oxygen uptake (V̇O2peak) are attenuated with shorter sprints. Twenty-four healthy men undertook 15 sessions of SSREHIT or TREHIT. V̇O2peak was determined at baseline and after completion of each exercise condition. Affective (pleasure-displeasure) responses and perceived exertion were assessed during exercise to capture peak responses. Enjoyment was recorded 5-min after cessation of exercise. Compared to baseline, V̇O2peak increased in both groups (6% for SSREHIT [d = -0.36] and 9% for TREHIT [d = -0.53], p = 0.01). Affective responses were more favourable for SSREHIT (p = 0.001, d = 1.62), but both protocols avoided large negative peaks of displeasure. Peak ratings of perceived exertion were lower for SSREHIT (p = 0.001, d = -1.71), although there were no differences in enjoyment (d = 0.25). The results demonstrate both exercise conditions can increase V̇O2peak without overly compromising perceptual responses. Decreased sprint duration might further circumvent negative perceptual responses but might also attenuate physiological adaptations.
Original languageEnglish
JournalInternational Journal of Sports Medicine
Early online date6 Oct 2020
DOIs
Publication statusE-pub ahead of print - 6 Oct 2020

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