Effect of caffeine ingestion on time trial performance in cyclists: a systematic review and meta-analysis.
| Autor: | Chen B; Fujian Agriculture and Forestry University, Department of Public Physical Education, Fuzhou, China., Ding L; Shanghai University of Sport, School of Physical Education, Shanghai, China., Qin Q; Shanghai University of Sport, School of Athletic Performance, Shanghai, China., Lei TH; Hubei Normal University, College of Physical Education, Huangshi, China., Girard O; The University of Western Australia, School of Human Sciences (Exercise and Sport Science), Perth, Australia., Cao Y; Shanghai University of Sport, School of Athletic Performance, Shanghai, China. |
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| Jazyk: | angličtina |
| Zdroj: | Journal of the International Society of Sports Nutrition [J Int Soc Sports Nutr] 2024 Dec; Vol. 21 (1), pp. 2363789. Date of Electronic Publication: 2024 Jun 05. |
| DOI: | 10.1080/15502783.2024.2363789 |
| Abstrakt: | Background: Caffeine, widely recognized as an ergogenic aid, has undergone extensive research, demonstrating its effectiveness to enhance endurance performance. However, there remains a significant gap in systematically evaluating its effects on time trial (TT) performance in cyclists. Purpose: This meta-analysis aimed to determine the efficacy of caffeine ingestion to increase cycling TT performance in cyclists and to evaluate the optimal dosage range for maximum effect. Methods: A search of four databases was completed on 1 December 2023. The selected studies comprised crossover, placebo-controlled investigations into the effects of caffeine ingestion on cycling TT performance. Completion time (Time) and mean power output (MPO) were used as performance measures for TT. Meta-analyses were performed using a random-effects model to assess the standardized mean differences (SMD) in individual studies. Results: Fifteen studies met the inclusion criteria for the meta-analyses. Subgroup analysis showed that moderate doses of caffeine intake (4-6 mg/kg) significantly improved cycling performance (SMD Conclusion: A moderate dosage (4-6 mg/kg) of caffeine, identified as the optimal dose range, can significantly improve the time trial performance of cyclists, while a low dose (1-3 mg/kg) does not yield improvement. In addition, the improvements in completion time and mean power output resulting from a moderate dose of caffeine are essentially the same in cycling time trails. |
| Databáze: | MEDLINE |
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