Increases in cycling performance in response to caffeine ingestion are repeatable

Nutrition Research
Todd A AstorinoJessica Duhon

Abstract

The primary aim of this study was to determine the repeatability of caffeine's ergogenic effects on cycling performance. It was hypothesized that improvements in performance would be similar when caffeine was ingested on 2 separate days. Nine endurance-trained men and women (mean age and maximal oxygen uptake, 27.4 ± 5.9 years and 57.5 ± 3.9 mL kg⁻¹ min⁻¹) initially completed 2 familiarization trials. During 3 subsequent sessions separated by at least 48 hours, the subjects completed a 10-km cycling time trial preceded by ingestion of a drink containing caffeine (5 mg/kg) or placebo. Treatments were ingested using a randomized, single-blind, crossover design, and the subjects were deceived as to the specific content of all drinks. During exercise, heart rate, rating of perceived exertion, and time were recorded every 1.6 km. Repeated-measures analysis of variance was used to compare the differences in variables across distance and treatment. In both caffeine trials, caffeine increased (P = .02) cycling performance by 1.6% and 1.9% vs placebo (16.98 ± 0.96 and 16.92 ± 0.97 minutes with caffeine vs 17.25 ± 0.96 minutes in placebo), and 7 of 9 subjects revealed improved performance. The mean performance improvement in the caffeine...Continue Reading

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Citations

Sep 1, 2015·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Katsuhiko SuzukiShih-Hua Fang
Jun 28, 2016·Nutrients·Terri Graham-PaulsonVictoria Goosey-Tolfrey
Sep 12, 2014·Medicine and Science in Sports and Exercise·Christopher D BlackAlexander R Gonglach
Mar 4, 2020·Sports Medicine·Vitor De Salles PainelliFlávio Oliveira Pires
Oct 13, 2019·International Journal of Sports Physiology and Performance·Peter J WhalleyCarl D Paton
Apr 13, 2019·Sports Medicine·Craig Pickering, Jozo Grgic
Jan 7, 2021·European Journal of Applied Physiology·Gabriel BarretoBryan Saunders

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