Int J Sports Med 2020; 41(14): 1061-1066
DOI: 10.1055/a-1088-5388
Physiology & Biochemistry

Capsaicin Supplementation during High-intensity Continuous Exercise: A Double-blind Study

1   Laboratory of Exercise Biochemistry. Department of Physical Education. Universidade Estadual de Londrina, Paraná, Brazil.
6   Exercise and Immunometabolism Research Group. Post-Graduation Program in Moviment Sicences. Department of Physical Education. State University of São Paulo (UNESP). School of Technology and Sciences. Presidente Prudente, São Paulo, Brazil
,
2   Département de Kinésiologie, Université Laval, Quebec, Canada
,
3   Exercise and Immunometabolism Research Group. Post-Graduation Program in Physiotherapy. Department of Physical Education. State University of São Paulo (UNESP). School of T-echnology and Sciences. Presidente Prudente, São Paulo, Brazil.
,
4   Physical Education, University of Sao Paulo, Sao Paulo, Brazil
,
5   Department of Physical Education, Unversidade Federal do Piaui, Teresina, Brazil
,
6   Exercise and Immunometabolism Research Group. Post-Graduation Program in Moviment Sicences. Department of Physical Education. State University of São Paulo (UNESP). School of Technology and Sciences. Presidente Prudente, São Paulo, Brazil
› Author Affiliations
Funding: This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

Abstract

To investigate the effect of acute capsaicin (CAP) supplementation on time to exhaustion, physiological responses and energy systems contribution during continuous high-intensity exercise session in runners. Fifteen recreationally-trained runners completed two randomized, double-blind continuous high-intensity exercises at the speed eliciting 90% V̇O2peak (90% s V̇O2peak), 45 minutes after consuming capsaicin or an isocaloric placebo. Time to exhaustion, blood lactate concentration, oxygen consumption during and 20-min post-exercise, energy systems contribution, time to reach V̇O2peak, heart rate and the rate of perceived exertion (RPE) were evaluated. There was no significant difference between conditions for time to reach V̇O2peak (CAP:391.71±221.8 vs. PLA:298.20±174.5 sec, ES:0.58, p=0.872), peak lactate (CAP:7.98±2.11 vs. PLA:8.58±2.15 µmol, ES:−0.28, p=0.257), time to exhaustion (CAP:654.28±195.44 vs. PLA:709.20±208.44 sec, ES:−0.28, p=0.462, end-of-exercise heart rate (CAP:177.6±14.9 vs. PLA:177.5±17.9 bpm, ES:−0.10, p=0.979) and end-of-exercise RPE (CAP: 19±0.8 vs. PLA: 18±2.4, ES: 0.89, p=0.623). In conclusion, acute CAP supplementation did not increase time to exhaustion during high-intensity continuous exercise nor alter physiological responses in runners.



Publication History

Received: 21 June 2019

Accepted: 18 December 2019

Article published online:
21 July 2020

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