Acute effect of caffeine consumption on isotonic muscular strength and endurance: A systematic review and meta-analysis

作者：Polito M D^*; Souza D B; Casonatto J; Farinatti R

来源：Science & Sports, 2016, 31(3): 119-128.

DOI：10.1016/j.scispo.2016.01.006

• Nutrition
• Resistance training
• Central nervous system
• Stimulants
• Data analyses

Objectives.-The aim of the present study was to perform a systematic review and meta analysis of the acute effects of caffeine ingestion on maximal strength and muscular endurance in isotonic resistance exercises.
Equipment and methods.-Up until March 2015, 17 studies which met the inclusion criteria, 42 trials related to muscular endurance and 5 trials related to muscular strength, were found from a search in the following databases: PubMed, ISI Web of Knowledge, SportDiscus, Scielo, Lilacs, Medcarib, Ibecs and ProQuest Dissertations Et Theses. The effect sizes were calculated as the standardized mean difference and meta-analysis were completed using a random-effects model.
Results.-No significant effects were identified for gender, muscle location, muscle size, dosage of caffeine or form or timing of pre-exercise caffeine consumption on performance at maximum strength. For muscular endurance, all moderators were related to improve performance after caffeine intake (P<0.01). The between groups analysis showed no differences with regard to the effect sizes in the comparisons for muscle location (P=0.09); muscle size (P=0.12); caffeine dosage (P=0.08); and form of intake (P=0.24). Effect size related to time of consumption pre-exercise was significant only for 60 min, with significant differences vs. 45 min and 90 min (P=0.04). Comparisons between gender groups were not possible, since only one trial investigated females.

• 出版日期2016-6