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Recovery

每晚摄入15克胶原蛋白，夜间醒来次数下降27%

Dr. Gymbro · · 1 min read
#recovery #supplements #glycine #collagen #athletes #sleep #bedtime

每晚摄入15克胶原蛋白，夜间醒来次数下降27%

摘录：即使训练和营养已经到位，夜间频繁醒来仍会悄悄削弱恢复。小规模试验发现，睡前一小时摄入15克胶原蛋白肽，可将多导睡眠监测记录的醒来次数从29.3次降至21.3次，约减少27%。参与者的晨间Stroop测试成绩也有所提升。然而，总睡眠时间、入睡潜伏期和睡眠效率均未出现变化，且研究仅在13名男性身上进行，持续7晚，使用的产品由行业提供。以下是数据的真实含义以及举重者如何安全尝试的方法。

即使你可以完成每一组训练、吃完整套餐，却仍因夜里频繁醒来而让恢复功亏一篑。睡眠碎片化是许多举重者恢复的隐藏漏点。2024 年发表在 《欧洲营养学杂志》 的一项小规模试验表明，睡前来一勺胶原蛋白肽或许能修补这一漏洞。结果颇具诱惑力，但在下单之前还有一些前提需要了解。

为什么是睡前胶原蛋白？关键在于甘氨酸

胶原蛋白中的甘氨酸含量异常丰富，约占氨基酸残基的三分之一，而大多数蛋白粉的甘氨酸含量要低得多。甘氨酸长期被视为助眠成分，早期的少量试验（约 3 克）在睡前使用时曾报告主观睡眠质量提升。胶原蛋白肽为举重者提供甘氨酸以及其他必需氨基酸，成本相对低廉、使用方式也更熟悉。

研究团队来自拉夫堡大学及其合作单位，他们想弄清楚富含甘氨酸的胶原蛋白肽补剂能否改善已有睡眠困扰的活跃男性的睡眠质量。

研究设计：实际做了什么

这是一项小规模但相对严谨的交叉试验：

  • 参与者：13 名运动型男性，平均年龄 24 岁，每周训练约 7 小时。
  • 睡眠问题：平均雅典失眠量表（Athens Insomnia Scale）得分为 9，说明存在真实的睡眠困扰。
  • 干预措施：睡前 1 小时摄入 15 克胶原蛋白肽或安慰剂，连续 7 晚。
  • 实验形式：随机交叉设计——每位受试者都会经历两种条件，中间间隔至少 7 天，并在正式实验前有 7 晚的适应期。
  • 测量指标：全程使用睡眠日志和活动记录仪（actigraphy），第 7 晚额外进行多导睡眠监测（polysomnography，实验室金标准）并记录核心体温。认知、炎症和激素水平在第 7 晚及次日上午同步评估。

交叉设计的优势在于每位受试者既是实验组也是对照组，有效降低了小样本导致的噪声。

有所改善的地方：醒来次数下降 与 早晨表现提升

醒来次数减少

多导睡眠监测显示，胶原蛋白组的醒来次数为 21.3 ± 9.7 次，安慰剂组为 29.3 ± 13.8 次（P = 0.028），即每晚少约 8 次，下降约 27%。

睡眠日志的自报数据也呈同样趋势：7 天平均自报醒来次数为 1.3 ± 1.5 次（胶原）vs 1.9 ± 0.6 次（安慰剂），差异显著（P = 0.023）。客观与主观数据相吻合，说明结果较为可靠。

早晨 Stroop 测试表现更佳

第 7 晚次日早晨，受试者在 Stroop 任务中的正确率为 1.00 ± 0.00（胶原）vs 0.97 ± 0.05（安慰剂），差异显著（P = 0.009）。Stroop 测试衡量注意力与抑制自动反应的能力。虽然两组差距极小且可能出现天花板效应，但仍提示胶原蛋白或许对认知有轻微正向影响。

未见改变的方面：现实的提醒

以下指标在本研究中未出现显著差异：

  • 总睡眠时长
  • 入睡潜伏期（入睡速度）
  • 睡眠效率
  • 核心体温
  • 激素或炎症标志物
  • 主观困倦、疲劳或整体睡眠质量评分
  • 其他认知测试

换言之，胶原蛋白并非安眠药，也不能帮助你更快入睡或延长睡眠时间。它唯一影响的是睡眠中断的频率。如果你的主要问题是躺在床上翻来覆去半小时以上，这项研究对你帮助不大。

研究局限性

  • 样本极小：仅 13 名男性。小样本往往放大效应，也无法说明对女性、老年人或非运动人群的适用性。
  • 时间短暂：仅 7 晚。我们尚不清楚效果是会持续、增强还是消退。
  • 实验室数据仅一晚：多导睡眠监测只在第 7 晚进行一次，醒来次数的 headline 数据来源于单夜。
  • 行业提供的产品：补剂由 Rousselot 提供，且两位作者是该公司的雇员。虽不一定导致偏倚，但独立重复验证会更具说服力。
  • 多重比较：研究测量了大量指标，只有少数达显著，部分结果可能是偶然出现。

实际操作建议

  • 配方：每晚睡前约 1 小时摄入 15 克胶原蛋白肽。
  • 适合人群：夜间醒来频繁打断睡眠的运动员或举重者；不适用于入睡困难或整体睡眠时长不足的人。
  • 自测步骤：若你已有睡眠记录工具（如睡眠日志、可穿戴设备），可以进行为期 1‑2 周的低风险自我实验。保持其他生活习惯不变，重点观察夜间醒来的次数以及次日的精神状态。
  • 胶原蛋白 vs. 纯甘氨酸：约 3 克的纯甘氨酸是目前研究最充分、成本最低且易于携带的助眠方案。胶原蛋白提供甘氨酸及其他氨基酸，方便混入晚间奶昔，但剂量更大且证据稍弱。胶原蛋白并非完整蛋白，不应取代主蛋白来源；把它当作补充而非替代。如果你已经在使用胶原蛋白，15 克的睡前剂量是一个合乎逻辑的检验点；若想走最简路径，纯甘氨酸更直接。

结论

27% 的夜间醒来次数下降是一个真实且可测量的结果，但它来源于 13 名男性、为期一周、使用行业提供的产品。睡前摄入胶原蛋白肽对碎片化睡眠的举重者来说是一个低风险、值得一试的实验，而非已证实的“灵药”。如果决定尝试，请务必诚实记录数据，并继续坚持基础睡眠原则：固定作息、凉爽暗黑的睡眠环境以及咖啡因的合理断舍离。

来源：Thomas C 等. Eur J Nutr. 2024;63(1):323-335. doi: 10.1007/s00394-023-03267-w

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.

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Dr. Gymbro

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

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