Effect of Pre-Exercise Caffeine Intake on Endurance Performance and Core Temperature Regulation During Exercise in the Heat: A Systematic Review with Meta-Analysis,Sports Medicine

当前位置： X-MOL 学术 › Sports Med. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Effect of Pre-Exercise Caffeine Intake on Endurance Performance and Core Temperature Regulation During Exercise in the Heat: A Systematic Review with Meta-Analysis
Sports Medicine ( IF 9.3 ) Pub Date : 2022-05-26 , DOI: 10.1007/s40279-022-01692-1
Catherine Naulleau _{1,

2} , David Jeker _{1,

2} , Timothée Pancrate ₁ , Pascale Claveau ₁ , Thomas A Deshayes _{1,

3} , Louise M Burke ₄ , Eric D B Goulet _{1,

3}

Affiliation

Background

Heat is associated with physiological strain and endurance performance (EP) impairments. Studies have investigated the impact of caffeine intake upon EP and core temperature (C_T) in the heat, but results are conflicting. There is a need to systematically determine the impact of pre-exercise caffeine intake in the heat.

Objective

To use a meta-analytical approach to determine the effect of pre-exercise caffeine intake on EP and C_T in the heat.

Design

Systematic review with meta-analysis.

Data Sources

Four databases and cross-referencing.

Data Analysis

Weighted mean effect summaries using robust variance random-effects models for EP and C_T, as well as robust variance meta-regressions to explore confounders.

Study Selection

Placebo-controlled, randomized studies in adults (≥ 18 years old) with caffeine intake at least 30 min before endurance exercise ≥ 30 min, performed in ambient conditions ≥ 27 °C.

Results

Respectively six and 12 studies examined caffeine’s impact on EP and C_T, representing 52 and 205 endurance-trained individuals. On average, 6 mg/kg body mass of caffeine were taken 1 h before exercises of ~ 70 min conducted at 34 °C and 47% relative humidity. Caffeine supplementation non-significantly improved EP by 2.1 ± 0.8% (95% CI − 0.7 to 4.8) and significantly increased the rate of change in C_T by 0.10 ± 0.03 °C/h (95% CI 0.02 to 0.19), compared with the ingestion of a placebo.

Conclusion

Caffeine ingestion of 6 mg/kg body mass ~ 1 h before exercise in the heat may provide a worthwhile improvement in EP, is unlikely to be deleterious to EP, and trivially increases the rate of change in C_T.

中文翻译：

运动前摄入咖啡因对高温运动期间耐力表现和核心温度调节的影响：荟萃分析的系统评价

背景

热与生理紧张和耐力表现 (EP) 损伤有关。研究调查了咖啡因摄入量对高温下 EP 和核心温度 (C _T ) 的影响，但结果相互矛盾。需要系统地确定运动前咖啡因摄入量对热量的影响。

客观的

使用荟萃分析方法确定运动前摄入咖啡因对热身中 EP 和 C _T的影响。

设计

系统评价与荟萃分析。

数据源

四个数据库和交叉引用。

数据分析

_{使用 EP 和 C T}的稳健方差随机效应模型的加权平均效应摘要，以及用于探索混杂因素的稳健方差元回归。

研究选择

在成人（≥ 18 岁）中进行的安慰剂对照随机研究，在 ≥ 27 °C 的环境条件下，在耐力运动前至少 30 分钟摄入咖啡因 ≥ 30 分钟。

结果

分别有 6 和 12 项研究检查了咖啡因对 EP 和 C _T的影响，分别代表 52 和 205 名接受过耐力训练的人。平均而言，在 34°C 和 47% 相对湿度下进行约 70 分钟的运动前 1 小时，摄入 6 mg/kg 体重的咖啡因。_{咖啡因补充剂没有显着改善 EP 2.1 ± 0.8%（95% CI − 0.7 至 4.8），并且 C T}的变化率显着增加0.10 ± 0.03 °C/h（95% CI 0.02 至 0.19），与服用安慰剂。