Caffeine has been used as a performance-enhancing aid by athletes for many years. The first known study to explore the effects of caffeine ingestion on exercise performance dates back to 1907.1 Until recently, however, findings on this topic remained equivocal, despite a large number of published studies over the last 30 to 40 years.2 There are many possible reasons for the discrepant results between these studies, but one likely issue could be a common use of relatively small samples. To reconcile the equivocal evidence on this topic and overcome the low statistical power of individual studies, researchers have started to use meta-analytical methods. Meta-analysis is a statistical method that allows pooling of results from studies that address a similar research question.3 Given that meta-analytical …

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信息图表。醒来闻闻咖啡

多年来，咖啡因一直被运动员用作提高成绩的助剂。探索咖啡因摄入对运动表现影响的第一项已知研究可以追溯到 1907 年。1 直到最近，尽管在过去 30 到 40 年间发表了大量研究，但关于该主题的研究结果仍然模棱两可。 2 有许多可能这些研究之间存在差异的原因，但一个可能的问题可能是普遍使用相对较小的样本。为了调和关于这个主题的模棱两可的证据并克服个别研究的低统计能力，研究人员开始使用元分析方法。荟萃分析是一种统计方法，它允许汇集解决类似研究问题的研究结果。 3 鉴于荟萃分析……