Establishing a relationship between the effect of caffeine and duration of endurance athletic time trial events: A systematic review and meta-analysis

Journal of Science and Medicine in Sport
Joy G ShenJustin D Manjourides

Abstract

Caffeine has well-documented benefits on endurance athletic performance. Because of caffeine's ergogenic effects of reducing perceived fatigue, it is hypothesized that as duration of athletic event increases, so will the effect size of caffeine upon performance. This study aims to examine the relationship between duration of endurance athletic event and the effect size of caffeine compared to placebo for athletic performance. A systematic review and meta-analysis of placebo-controlled trials assessing the effects of caffeine in adults performing endurance athletic events. We searched MedLine, Web of Science, and review article references published through March 2016. We performed meta-analyses on placebo-controlled trials to determine the effect of the duration of an endurance athletic event on the standardized mean difference (Cohen's d) between the caffeine and placebo groups for athletic performance. Forty articles including 56 unique comparison groups were included. Pooled results showed a Cohen's d of 0.33 (95% CI=0.21, 0.45; p=1.00; I2=0%). The effect of the duration of athletic event was significantly associated with Cohen's d (Relative Risk: 0.005; 95% CI=0.001, 0.009; p=0.024). For a 30min increase in duration of the a...Continue Reading

Citations

Nov 30, 2019·British Journal of Clinical Pharmacology·Carlos Ruíz-MorenoJuan Del Coso
Aug 14, 2020·PloS One·Bruno Ferreira VianaFlávio Oliveira Pires
Apr 13, 2019·Sports Medicine·Craig Pickering, Jozo Grgic
Mar 7, 2019·Frontiers in Nutrition·Nanci S GuestAhmed El-Sohemy
Jun 10, 2020·Journal of the International Society of Sports Nutrition·Andreas ApostolidisMarios Hadjicharalambous
Jan 4, 2021·Journal of the International Society of Sports Nutrition·Nanci S GuestBill I Campbell
Dec 29, 2020·Nutrition Reviews·Kalliopi K GkouskouAristides G Eliopoulos
Jul 27, 2021·International Journal of Sport Nutrition and Exercise Metabolism·Lara Lima NabucoCaio Eduardo Gonçalves Reis
Dec 23, 2021·Scientific Reports·Felipe Sampaio-JorgeBeatriz Gonçalves Ribeiro

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