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Science & Research

Ketone IQ 在 Cape Epic 提升血酮水平,却未带来任何恢复效益

Dr. Gymbro · · 1 min read

八天,数百公里的南非单车越野赛。每天两次服用高端酮饮料,赛后,饮用 Ketone IQ 的骑手在外观、感受和表现上与服用安慰剂的骑手几乎没有区别。

这正是《European Journal of Sport Science》最新双盲试验的结论,为那些想借酮类补剂加速恢复的人提供了一次重要的现实检验。

研究到底测试了什么

Engelbrecht 等人跟踪了参加 2025 年 Absa Cape Epic 的 18 位受过训练的山地自行车手(共 10 支队伍)。骑手被随机分配,每天两次各 87.5 mL 的 Ketone IQ(其活性成分为 R‑1,3‑丁二醇,简称 BDO)或安慰剂。服用时间为每个赛段结束后以及睡前。

研究团队在真实赛场环境下记录了一系列指标:

  • 运动中心率与静息心率
  • 能量和碳水化合物摄入量
  • 补水情况
  • 睡眠质量指标
  • 认知表现(包括反应时间)
  • 主观疲劳与恢复感受

这正是本研究的价值所在。以往的酮类研究大多在受控实验室中进行,而本次则在连日赛段、疲劳、睡眠债和补给压力交织的真实比赛情境下,检验 BDO 是否能够提供帮助。

主要结果:产生酮症,却没有实际收益

饮料在血液化学上达到了预期效果。赛段结束后,BDO 使血中 β‑羟基丁酸(BHB) 浓度提升至约 1.0 mM,出现轻度酮症,这一现象从第一阶段就已经出现。

然而,优势并未随之出现。整个比赛期间,两组表现出相同的累积应激迹象:

  • 运动中心率下降
  • 静息心率上升
  • 能量和碳水摄入量增加
  • 到第 6 阶段时反应时间变慢

与安慰剂相比,BDO 并未改变上述任何趋势。论文标题直白地说明:赛后 BDO 未能改善疲劳或恢复指标。作者得出结论,轻度酮症在真实赛场环境中并不具备实质性效用。

丁二醇并非酮酯

这是消费者最容易忽视的关键点。所谓“酮类补剂”实际上涵盖了多种不同产品。

文献中常被引用的研究大多聚焦于 酮单酯(KME),该类在耐力运动中被关联到更好的恢复与降低生理压力。BDO 则是酮的 前体:人体需要先将其转化为 BHB,才能真正产生酮效应。一般而言,这条转化路径产生的血酮水平低于直接摄入酮单酯的饮料,本研究中约 1 mM 的酮浓度正符合这一规律。

作者在文中强调,必须进行 配方特异性 的评估。换言之,BDO 的负面结果并不等同于酮酯失效,酮酯的正面结果也不意味着 BDO 有效。它们是不同的产品,各自拥有独立的证据体系。

对潜在购买者的启示

本研究并未否定酮类的全部价值,但削弱了 Ketone IQ 能作为多日耐力项目恢复捷径的说法。

  • 剂量与时机:本次使用的是每天两次、每次 87.5 mL,赛后和睡前的方案。更大剂量或不同时间点的使用并未在本研究中检验。
  • 适用人群:如果你的主要目标是提升多阶段赛中的恢复、睡眠质量或第二天的状态,本试验未提供任何正面证据。
  • 更值得投入的方向:两组骑手在赛程进行中都增加了碳水和能量摄入。确保合理的补给、充足的睡眠和良好的补水,是已有充足研究支持且更能带来收益的做法。
  • 核对成分:选购时务必确认产品所含是 BDO 还是 酮酯,切勿将两者的研究结果混为一谈。

必须正视的局限性

本研究规模有限,以下几点值得注意:

  1. 样本量:仅 18 位骑手。小样本容易遗漏轻微(modest)的真实效应,因此“未检测到差异”并不等同于“已证实无效”。
  2. 骑手分队参赛:10 支队伍带来了真实世界的噪声,如配速、地形和各阶段需求的差异,这些在实验室研究中会被排除。
  3. 单一化合物、单一剂量、单一时间表:结论仅适用于本次使用的 BDO 产品、该剂量以及赛后服用的方案,未覆盖赛前使用或其他配方。
  4. 酮症轻微:血 BHB 约为 1.0 mM。更高的酮水平是否会改变结果仍未在本研究中检验。

值得称道的是研究设计本身的力度。能够在真实的八天赛中完成双盲、安慰剂对照的测试并不容易,这类生态效度强的证据正是补剂营销常缺乏的。

结论

Ketone IQ 在 Cape Epic 的骑手中成功提升了血酮水平,但在降低疲劳、保护反应时间或改善恢复方面并未优于安慰剂。对于考虑高价酮饮料的耐力运动员而言,本试验提示应对 BDO 用于恢复保持怀疑态度。更大样本的研究以及与酮酯的直接比较,将有助于给出更完整的答案。

来源:Engelbrecht 等,“Post‑Exercise R‑1,3‑Butanediol did not Improve Markers of Fatigue or Recovery During a Multi‑Stage Mountain Bike Race”,Eur J Sport Sci(2026)。DOI: https://doi.org/10.1002/ejsc.70260。PubMed: https://pubmed.ncbi.nlm.nih.gov/42852530/

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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