Biology of Sport
eISSN: 2083-1862
ISSN: 0860-021X
Biology of Sport
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4/2021
vol. 38
 
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abstract:
Original paper

Caffeine mouth rinse enhances performance, fatigue tolerance and reduces muscle activity during moderate-intensity cycling

Alan de Albuquerque Melo
1
,
Victor José Bastos-Silva
1
,
Felipe Arruda Moura
2
,
Rodrigo Rico Bini
3
,
Adriano Eduardo Lima-Silva
4
,
Gustavo Gomes de Araujo
1

  1. Research Group Applied to Sport Science-GPCAE, Federal University of Alagoas, Avenue Lourival Melo Mota, s/n, Maceió-AL 57072-900, Brazil
  2. Laboratory of Applied Biomechanics, State University ofLondrina, Avenue Gil de Abreu e Souza, 2335, Unidade 1121, Esperança, Londrina 86058-100, Brazil
  3. La Trobe Rural Health School, La Trobe University, Flora Hill, 3550, Victoria, Australia
  4. Human Performance Research Group, Federal University of Techonology Parana, Pedro Gusso street 2601,Neoville, Curitiba-PR 81310-900, Brazil
Biol Sport. 2021;38(4):517–523.
DOI: https://doi.org/10.5114/biolsport.2021.100147
Online publish date: 2021/01/14
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We investigated the effects of caffeine mouth rinse on endurance performance, muscle recruitment (i.e., electromyographic activity of the vastus lateralis and rectus femoris), rating of perceived effort and heart rate. Twelve physically-active healthy men cycled at 80% of their respiratory compensation point until task failure. The participants rinsed their mouths for 10 seconds with placebo (PLA, 25 mL of a solution composed of non-caloric mint essence) or caffeine (CAF, 25 mL of 1.2% of anhydrous caffeine concentration with noncaloric mint essence) every 15 minutes of exercise. Time until exhaustion increased 17% (effect size = 0.70) in CAF compared to PLA (p = 0.04). The wavebands of low-frequency electromyographic activity (EMG) of the vastus lateralis and rectus femoris was lower in CAF group than PLA at 50% of the time until exhaustion (p = 0.04). The global EMG signal was lower in CAF group than PLA at 100% of the time until exhaustion (p = 0.001). The rating of perceived effort pooled was higher in CAF mouth rinse (p = 0.001) than PLA group. No effect was found on the heart rate between the groups (p > 0.05). Caffeine mouth rinse increases endurance performance, rating of perceived effort and decreases muscle activity during a moderate-intensity exercise.
keywords:

Endurance Capacity, Muscle Skeletal, Nutrition, Exercise

  
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