Perceptual Responses to High- and Moderate-Intensity Interval Exercise in Adolescents

ABSTRACT Purpose High-intensity continuous exercise is proposed to evoke unpleasant sensations as predicted by the dual mode theory (DMT), and may negatively impact on future exercise adherence. Previous studies support unpleasant sensations in affective responses during continuous high-intensity exercise, but the affect experience during high-intensity interval exercise (HIIE) involving brief bursts of high-intensity exercise separated by low-intensity activity is poorly understood in adolescents. We examined the acute affective, enjoyment and perceived exertion responses to HIIE compared to moderate-intensity interval exercise (MIIE) in adolescents. Methods Thirteen adolescent boys (mean±SD; age 14.0±0.5 years) performed two counterbalanced exercise conditions: 1) HIIE: 8 x 1-minute work intervals at 90% maximal aerobic speed; and 2) MIIE: between 9-12 x 1-minute work intervals at 90% ventilatory threshold where the number of intervals performed were distance-matched to HIIE. HIIE and MIIE intervals were interspersed with 75 s active recovery at 4 km·h−1. Affect, enjoyment and rating of perceived exertion (RPE) were recorded before, during and after exercise. Results Affect responses declined in both conditions but the fall was greater in HIIE than MIIE (P0.64). Conclusions Despite elevated RPE, HIIE did not elicit prominent unpleasant feelings as predicted by DMT and was associated with greater post-exercise enjoyment responses than MIIE. This study demonstrates the feasibility of the application of HIIE as an alternative form of PA in adolescents. Corresponding author: Dr Alan R. Barker, Children's Health and Exercise Research Centre, Sport and Health Sciences, College of Life and Environmental Sciences, University of Exeter, St Luke's Campus, Exeter, EX1 2LU, Tel: 44 (0)1392 722766 Adam Abdul Malik is financially supported by the Government of Malaysia for the funding under the academic staff training scheme (USM/PPSP(Pent)/L2/bJld.XV). The results of the present study are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation. The results of this study also do not constitute endorsement by the American College of Sports Medicine. The authors have no conflicts of interest to disclose. Accepted for Publication: 27 November 2017 © 2017 American College of Sports Medicine

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