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Capsaicin supplementation increases time to exhaustion in high-intensity intermittent exercise without modifying metabolic responses in physically active men

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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 (\(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\)) and the speed associated with \(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\) (s\(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\)). Thereafter, subjects completed two randomized, double-blind HIIE (15s:15 s at 120% s\(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\)) 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 \(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\), 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.

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Abbreviations

CAP:

Capsaicin

EPOC:

Excess of post-exercise oxygen consumption

HIIE:

High-intensity intermittent exercise

RPE:

Rate of perceived exertion

s\(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\) :

Speed associated with \(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\)

TRPV1:

Transient receptor potential vanilloid-1

\(\dot {V}{{\text{O}}_{{\text{2Peak}}}}\) :

Peak oxygen uptake

References

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Acknowledgements

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001. We thank Dr. Alessandro Moura Zagatto (São Paulo State University—UNESP) for his critical reading of the manuscript.

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Authors and Affiliations

Authors

Contributions

Study design and organization of the manuscript were performed by MCF, FB, VLGP, FER, CF, EC, and FSL. Data analysis, statistical analysis, and the first draft of the manuscript were performed by MCF, VLGP, FER, FB, and FSL. The manuscript review was performed by MCF, FB, VLGP, FER, CF, EC, and FSL. The final approval for publication was performed by FSL.

Corresponding author

Correspondence to Fabio Santos Lira.

Additional information

Communicated by Fabio Fischetti.

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de Freitas, M.C., Billaut, F., Panissa, V.L.G. et al. Capsaicin supplementation increases time to exhaustion in high-intensity intermittent exercise without modifying metabolic responses in physically active men. Eur J Appl Physiol 119, 971–979 (2019). https://doi.org/10.1007/s00421-019-04086-w

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  • DOI: https://doi.org/10.1007/s00421-019-04086-w

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