Marcelo Conrado de Freitas1,2, François Billaut3, Valéria Leme Gonçalves Panissa4, Fabricio Eduardo Rossi5, Caique Figueiredo6, Erico Chagas Caperuto7, Fabio Santos Lira8. 1. Skeletal Muscle Assessment Laboratory (LABSIM), Department of Physical Education, School of Technology and Sciences, São Paulo State University (UNESP), Presidente Prudente, Brazil. 2. Department of Nutrition, University of Western São Paulo (UNOESTE), Presidente Prudente, Brazil. 3. Department of Kinesiology, Laval University, Quebec, QC, Canada. 4. Department of Sport, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil. 5. Immunometabolism of Skeletal Muscle and Exercise Research Group, Federal University of Piauí (UFPI), Teresina, Brazil. 6. Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil. 7. University São Judas Tadeu, São Paulo, SP, Brazil. 8. Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil. fabio.lira@unesp.br.
Abstract
PURPOSE: The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance and physiological responses during high-intensity intermittent exercise (HIIE). METHOD: Thirteen physically active men (age = 24.4 ± 4.0 years; height = 176.4 ± 6.9 cm; body mass = 78.7 ± 13.8 kg; running training per week = 3.9 ± 0.9 h) performed an incremental running test to determine peak oxygen uptake ([Formula: see text]) and the speed associated with [Formula: see text] (s[Formula: see text]). Thereafter, subjects completed two randomized, double-blind HIIE (15s:15 s at 120% s[Formula: see text]) trials 45-min after consuming capsaicin (12 mg) or an isocaloric placebo. Time to exhaustion, blood lactate concentration, oxygen consumption during and 20 min post-exercise, energy expenditure, time spent above 90% of [Formula: see text], and the rate of perceived exertion were evaluated. RESULTS: There was no difference between capsaicin and placebo for any variable except time to exhaustion [capsaicin: 1530 ± 515 s (102 efforts) vs placebo: 1342 ± 446 s (89 efforts); p < 0.001]. CONCLUSION: In conclusion, capsaicin supplementation increased time to exhaustion in high-intensity intermittent exercise without modifying the metabolic response of exercise or the rate of perceived exertion in physically active men. Capsaicin could be used to increase the training load during specific exercise training sessions.
RCT Entities:
PURPOSE: The purpose of this study was to investigate the acute effect of capsaicin supplementation on performance and physiological responses during high-intensity intermittent exercise (HIIE). METHOD: Thirteen physically active men (age = 24.4 ± 4.0 years; height = 176.4 ± 6.9 cm; body mass = 78.7 ± 13.8 kg; running training per week = 3.9 ± 0.9 h) performed an incremental running test to determine peak oxygen uptake ([Formula: see text]) and the speed associated with [Formula: see text] (s[Formula: see text]). Thereafter, subjects completed two randomized, double-blind HIIE (15s:15 s at 120% s[Formula: see text]) trials 45-min after consuming capsaicin (12 mg) or an isocaloric placebo. Time to exhaustion, blood lactate concentration, oxygen consumption during and 20 min post-exercise, energy expenditure, time spent above 90% of [Formula: see text], and the rate of perceived exertion were evaluated. RESULTS: There was no difference between capsaicin and placebo for any variable except time to exhaustion [capsaicin: 1530 ± 515 s (102 efforts) vs placebo: 1342 ± 446 s (89 efforts); p < 0.001]. CONCLUSION: In conclusion, capsaicin supplementation increased time to exhaustion in high-intensity intermittent exercise without modifying the metabolic response of exercise or the rate of perceived exertion in physically active men. Capsaicin could be used to increase the training load during specific exercise training sessions.
Entities:
Keywords:
Energy system contribution; Excess post-oxygen consumption; Lactate
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