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Nutrition

双倍咖啡因对拳击手帮助有限——真相揭秘

Dr. Gymbro · · 1 min read

你以为预训练粉加双倍咖啡因就能让表现翻倍吗?

最新的实验在竞技拳击手中给出了答案——可能并不成立。研究人员将 3 mg/kg 与 6 mg/kg 的咖啡因与安慰剂进行比较,发现两种剂量都能提升跳跃表现,但 更高剂量并未带来持续的额外提升。

研究到底是怎么做的

  • 发表期刊:Journal of the International Society of Sports Nutrition(2026)
  • 作者:Tuerhongjiang 等人
  • 设计:随机、双盲、安慰剂对照、交叉
  • 受试者:15 名男性拳击手,全部达到中国国家二级及以上运动员标准

每位拳击手按随机顺序完成三种处理,之间间隔一周洗脱期:

  1. 安慰剂
  2. 3 mg/kg 咖啡因(CAF3)
  3. 6 mg/kg 咖啡因(CAF6)

研究团队测量了 下蹲跳(CMJ)、弹力俯卧撑(BPU) 以及优势侧肩部和膝关节的等速峰扭矩(PT)。测试在基线以及摄入后 30 分钟 与 60 分钟 进行。统计上使用 Holm 校正,对 10 项预设交互检验进行多重比较,以控制假阳性率。

头条结论:两种剂量在 60 分钟时都有效

在计划的 60 分钟评估 中,3 mg/kg 与 6 mg/kg 均显著高于安慰剂,提升了 CMJ 的跳高、峰功率以及相对峰功率。两者之间没有显著差异。这说明对下肢爆发力而言,较低剂量已经足以捕获可观察的收益,剂量翻倍并未带来额外的可检测提升。

6 mg/kg 领先的几项指标

  • 弹力俯卧撑:CAF6 在 60 分钟时的向心冲量、平均功率和峰功率均高于安慰剂,而 CAF3 未出现显著差异。
  • 膝伸展扭矩:这是最明确的剂量特异性结果,CAF6 在 60 分钟时同时优于安慰剂和 CAF3。
  • 肩部扭矩:在部分时间点,屈伸峰扭矩在摄入咖啡因后上升,但未出现一致的剂量优势。

作者总结,响应模式随剂量和任务而异,6 mg/kg 并未在整体上优于 3 mg/kg。更大剂量只在少数指标上略有优势,不能算作全线提升。

毫克/公斤速查表

以下是不同体重对应的咖啡因剂量(毫克):

体重 3 mg/kg 6 mg/kg
60 kg(132 lb) 180 mg 360 mg
70 kg(154 lb) 210 mg 420 mg
80 kg(176 lb) 240 mg 480 mg
90 kg(198 lb) 270 mg 540 mg
100 kg(220 lb) 300 mg 600 mg

检查你的预训练粉标签。许多产品标示每份 200–400 mg,并常与其他兴奋剂混合。如果一次取两勺、再加一杯咖啡和一罐能量饮料,摄入量很可能已经超过 6 mg/kg 而不自知。

时间安排:大约 60 分钟前摄入

显著效果主要出现在 60 分钟评估 时段,这是本研究最有力的窗口。因此在训练前约一小时摄入咖啡因最为合适。摘要特别强调了 60 分钟而非 30 分钟,所以不要指望刚开始运动时就能获得顶峰效益。

过量的陷阱:剂量更大不一定更好

本研究的摘要未报告副作用,以下内容仅为一般背景,而非本文的直接发现。高剂量咖啡因常伴随颤抖、焦虑、心率升高、胃部不适以及睡眠紊乱。对拳击手而言,过度兴奋可能削弱专注和恢复,夜间摄入更会影响睡眠质量。

如果 3 mg/kg 已经带来大部分可测收益,提升至 6 mg/kg 只会在有限的额外收益中增加副作用风险。对膝伸展扭矩等少数指标可能值得一试,但这并非免费升级。

适用人群

  • 力量‑爆发和格斗类运动员,寻找一个合理的起始剂量。
  • 举重爱好者和健身者,怀疑自己的预训练粉剂量已超需求。
  • 对咖啡因敏感的人,更倾向于从低剂量开始。

实用做法是先以 约 3 mg/kg 为基准,在训练前约一小时摄入,只有在明确需求且耐受良好时才考虑上调。咖啡因反应因人而异,务必先在平时训练中试验,而不要在赛事当天首次使用。

需要留意的局限性

  • 未测试拳击技术动作。 作者说明结果仅针对选定的神经肌肉指标,不能直接等同于拳击或比赛表现的提升。
  • 样本量小。 仅 15 名男性拳击手,结果可能不适用于女性或其他水平的运动员。
  • 实验室环境。 跳跃、俯卧撑和等速扭矩是受控指标,无法完整复制实战情境。
  • 剂量‑任务交互不一致。 摘要指出个体响应分类仍属探索阶段。
  • 日常咖啡因摄入未控制。 研究未说明受试者平时的咖啡因摄入量,个人耐受性仍是未知数。

结论

在受过训练的男性拳击手中,3 mg/kg 的咖啡因在 60 分钟时对跳跃表现的提升几乎等同于 6 mg/kg。更高剂量仅在少数项目(如弹力俯卧撑功率和膝伸展扭矩)上表现出优势。想要加大剂量前,请先算好自己的 mg/kg,确保在训练前约一小时摄入,并记住目前仍缺乏证据表明这会直接转化为更有力度的拳击表现。

来源:Tuerhongjiang 等. Acute effects of 3 and 6 mg·kg⁻¹ caffeine on strength‑power performance and isokinetic peak torque in competitive male boxers: a randomized, double‑blind, placebo‑controlled crossover trial. J Int Soc Sports Nutr. 2026. DOI: 10.1080/15502783.2026.2743368 | PubMed

Original study

Read the original research on pubmed.ncbi.nlm.nih.gov →

This article summarizes published research for general information. It is not medical advice.

DG

Written by

Dr. Gymbro

Dr. Gymbro writes for Dr. Gymbro: science-backed fitness, nutrition & performance.

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