Lásaro A Costa1, Marcelo C Freitas2, Jason M Cholewa3, Valéria L G Panissa4, Fabio Y Nakamura5, Vilton E L M Silva1, Alcione M Sá1, Priscila A Q Rossi6, Sergio L G Ribeiro1, Marcos A P Santos7, Nelo E Zanchi8, Fabio S Lira6, Fabrício E Rossi1,9. 1. Department of Physical Education, Federal University of Piauí (UFPI), Teresina, PI, BRAZIL. 2. Department of Nutrition, University of Western São Paulo (UNOESTE), Presidente Prudente, SP, BRAZIL. 3. Department of Kinesiology, Coastal Carolina University, Conway, SC, USA. 4. Department of Sport, School of Physical Education and Sport, University of São Paulo, São Paulo, BRAZIL. 5. Associate Graduate Program in Physical Education UPE/UFPB, João Pessoa, PB, BRAZIL. 6. Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP, BRAZIL. 7. Department of Biophysics and Physiology, Federal University of Piaui, Campus Minister Petrônio Portela, Ininga, Teresina, PI, BRAZIL. 8. Department of Physical Education, Federal University of Maranhão, São Luís, BRAZIL. 9. Associate Graduate Program in Health Science, Federal University of Piauí (UFPI), Teresina, PI, BRAZIL.
Abstract
OBJECTIVES: Performance in running-based sport depends on the ability to perform repetitive high intensity muscle contractions. Previous studies have shown that capsaicin analog (CAP) (i.e. Capsiate) supplementation may improve this performance. The purpose of this study was to investigate the acute effect of CAP supplementation on short (400 m) and middle distance (3000 m) running time-trial performance, maximum heart rate (HR), and rate of perceived exertion (RPE). METHODS: Twelve physically active men completed four randomized, double-blind trials: CAP condition (12 mg) or a placebo condition. Forty-five minutes after supplementation, the participants performed a 400- or 3000-meter running time trial. Time (in seconds) was recorded. HR was analyzed at rest and immediately post-exercise, and RPE was collected immediately after exercise. RESULTS: For both the 400 m time-trial (CAP = 66.4 + 4.2 sec vs Placebo = 67.1 + 4.8 sec, p = 0.046) and the 3000 m time-trial (CAP = 893.9 ± 46.8 sec vs Placebo = 915.2 ± 67.6 sec, p = 0.015), the time in seconds was significantly less in the CAP compared to placebo conditions. There were no statistically significant differences for HR and RPE in any condition. CONCLUSION: In summary, acute CAP supplementation improved 400 m and 3000 m running time-trial performance in a distance-dependent way but without modifying the HR and RPE.
OBJECTIVES: Performance in running-based sport depends on the ability to perform repetitive high intensity muscle contractions. Previous studies have shown that capsaicin analog (CAP) (i.e. Capsiate) supplementation may improve this performance. The purpose of this study was to investigate the acute effect of CAP supplementation on short (400 m) and middle distance (3000 m) running time-trial performance, maximum heart rate (HR), and rate of perceived exertion (RPE). METHODS: Twelve physically active men completed four randomized, double-blind trials: CAP condition (12 mg) or a placebo condition. Forty-five minutes after supplementation, the participants performed a 400- or 3000-meter running time trial. Time (in seconds) was recorded. HR was analyzed at rest and immediately post-exercise, and RPE was collected immediately after exercise. RESULTS: For both the 400 m time-trial (CAP = 66.4 + 4.2 sec vs Placebo = 67.1 + 4.8 sec, p = 0.046) and the 3000 m time-trial (CAP = 893.9 ± 46.8 sec vs Placebo = 915.2 ± 67.6 sec, p = 0.015), the time in seconds was significantly less in the CAP compared to placebo conditions. There were no statistically significant differences for HR and RPE in any condition. CONCLUSION: In summary, acute CAP supplementation improved 400 m and 3000 m running time-trial performance in a distance-dependent way but without modifying the HR and RPE.
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