Aviation Medicine Unit, Royal New Zealand Air Force Base Auckland, Whenuapai, Auckland, New Zealand; School of Sport, Exercise and Nutrition, Massey University, New Zealand.
Department of Exercise Sciences, University of Auckland, New Zealand.
Physiol Behav. 2023 Aug 1;267:114208. doi: 10.1016/j.physbeh.2023.114208. Epub 2023 Apr 29.
This systematic review, meta-analysis and meta-regression examined the effect of acute normobaric hyperoxic breathing on cognition in healthy humans. 23 studies were included providing 76 effect estimates (EE). Hyperoxic breathing improved memory accuracy (22 EEs; g = 0.34) and speed (9 EEs; g = 0.59), attention accuracy (7 EEs; g = 0.59) and speed (7 EEs; g = 0.51), reaction speed (8 EEs; g = 0.82), crystallised intelligence (7 EEs; g = 0.73), executive function (6 EEs; g = 0.88) and information processing (10 EEs; g = 0.62). However, the overall quality of evidence was low (average Rosendal score of 47%) and there was a large range of study heterogeneity, with prediction intervals often crossing 0; therefore, reducing the reliability of the magnitude of these favourable effects. Oxygen percentage, 100% compared with 22-99% oxygen, temporal position of administration to task performance, and study quality did not influence the overall weighted mean effects for most cognitive domains. Altogether, despite beneficial results, further high quality research is required prior to recommending hyperoxic breathing to enhance cognition.
这项系统评价、荟萃分析和荟萃回归研究了急性常压高氧呼吸对健康人类认知的影响。纳入了 23 项研究，提供了 76 个效应估计值（EE）。高氧呼吸改善了记忆准确性（22 个 EE；g=0.34）和速度（9 个 EE；g=0.59）、注意力准确性（7 个 EE；g=0.59）和速度（7 个 EE；g=0.51）、反应速度（8 个 EE；g=0.82）、晶体智力（7 个 EE；g=0.73）、执行功能（6 个 EE；g=0.88）和信息处理（10 个 EE；g=0.62）。然而，证据的总体质量较低（平均 Rosendal 评分 47%），研究异质性范围很大，预测区间经常跨越 0；因此，降低了这些有利影响的幅度的可靠性。对于大多数认知领域，氧气百分比（100%与 22-99%氧气相比）、给药到任务表现的时间位置以及研究质量均不影响整体加权平均效应。总的来说，尽管有有益的结果，但在推荐高氧呼吸来增强认知能力之前，还需要进行更多高质量的研究。
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