Caffeine Mouth Rinse Does Not Improve Time to Exhaustion in Male Trained Cyclists

Autor(es)

Nabuco, Lara Lima ^{[1, 2]} ; Saunders, Bryan ^{[3, 4, 5]} ; Sousa da Silva, Renato Andre ^{[6, 7]} ; Molina, Guilherme Eckhardt ^[7] ; Goncalves Reis, Caio Eduardo ^[8]

Afiliação do(s) autor(es)

^[1] Univ Brasilia, Sch Hlth Sci, Human Nutr Grad Program, Brasilia, DF - Brazil

^[2] Univ Brasilia, Lab Bioquim Nutr, Nucleo Nutr & Med Trop, Brasilia, DF - Brazil

^[3] Univ Sao Paulo, Sch Phys Educ & Sport, Appl Physiol & Nutr Res Grp, Sao Paulo, SP - Brazil

^[4] Univ Sao Paulo, Fac Med FMUSP, Rheumatol Div, Sao Paulo, SP - Brazil

^[5] Univ Sao Paulo, Fac Med FMUSP, Inst Orthopaed & Traumatol, Sao Paulo, SP - Brazil

^[6] Euro Amer Univ Ctr, Fac Phys Educ, Lab Phys Performance & Hlth, Brasilia, DF - Brazil

^[7] Univ Brasilia, Lab Exercise Physiol, Fac Phys Educ, Brasilia, DF - Brazil

^[8] Univ Brasilia, Dept Nutr, Sch Hlth Sci, Brasilia, DF - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF SPORT NUTRITION AND EXERCISE METABOLISM; v. 31, n. 5, p. 412-419, SEP 2021.
• Citações Web of Science: 0

Resumo

This study investigated the effects of caffeine mouth rinse on cycling time to exhaustion (TTE) and physiological responses in trained cyclists. In a double-blinded randomized counterbalanced cross-over design, 10 recreationally trained male cyclists (mean +/- SD: 32 +/- 3 years, 72.8 +/- 5.3 kg, 1.78 +/- 0.06 m, 13.9%+/- 3.3% body fat, peak power output = 289.4 +/- 24.7 W) completed two TTE tests cycling at 75% of peak aerobic power following 24 hr of dietary and exercise standardization. Cyclists were administered 25-ml mouth rinses for 5 s containing either 85 mg of caffeine or control (water) every 5 min throughout the exercise tests. No significant improvement in TTE was shown with caffeine mouth rinse compared with control (33:24 +/- 12:47 vs. 28:08 +/- 10:18min; Cohen's dz effect size: 0.51, p =.14). Caffeinemouth rinse had no significant effect on ratings of perceived exertion (p =.31) or heart rate (p =.35) throughout the cycling TTE protocol. These data indicate that a repeated dose of caffeinated mouth rinse for 5 s does not improve cycling TTE in recreationally trained male cyclists. However, these findings should be taken with caution due to the small sample size and blinding ineffectiveness, while further well-design studies with larger samples are warranted. (AU)

• Processo FAPESP: 16/50438-0 - Suplementação nutricional e exercício para otimizar o desempenho: foco nas respostas individuais e um passo para a nutrição esportiva personalizada
• Beneficiário: Bryan Saunders
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores