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Science & Research

胶原肽让肌肉I型胶原增加三倍,背后到底有什么猫腻?

Dr. Gymbro · · 1 min read

胶原补剂长期以来常以夸大宣传和薄弱证据为噱头。近期《Frontiers in Physiology》发布的一项随机、安慰剂对照试验,为力量训练者提供了更具体的数据。但该研究同样留下了不少未解之谜,购买前务必要弄清楚细节。

主要发现

来自德国、丹麦和奥地利的科研团队让 29 名健康男性 进行为期 12 周、强度为 1RM 70%‑85% 的高负荷阻力训练。实验组每日摄入 15 克特定胶原肽(SCP),对照组则服用安慰剂。

训练前后,研究者在受试者的 股外侧肌(vastus lateralis) 取活检,测定肌肉内部的胶原含量。

结果显示,SCP 组的Ⅰ型胶原增加了 29.8%,而安慰剂组仅 9.9%(p = 0.026),增幅约为对照组的三倍。

作者将其称为 内膜(endomysium)Ⅰ型胶原的提升。内膜是包裹每根肌纤维的薄层结缔组织,负责把肌纤维产生的力量传递到肌腱和骨骼。

为什么肌肉结缔组织很重要

健身圈大多数讨论都聚焦在肌肉的收缩能力上,而 细胞外基质(extracellular matrix) 则是支撑和力传递的“骨架”。胶原是该基质的主要结构蛋白,会随着机械负荷而重塑。作者推测,SCP 导致的Ⅰ型胶原提升可能增强肌纤维的结构支撑,但这仅是猜想,研究并未直接验证其功能效应。

两组之间没有差别的指标

  • Ⅲ型和Ⅳ型胶原 在整体样本中均显著升高,说明仅靠训练就能提升这两种胶原,SCP 与安慰剂之间无显著差异。
  • 成纤维细胞密度(产生胶原的细胞)在两组以及组内均未出现变化。

因此,益处仅限于Ⅰ型胶原的提升,并非所有胶原种类的普遍上调。研究也没有显示补剂使肌肉细胞本身产生更多胶原,因为成纤维细胞数量保持不变。

测量了什么,没测量什么

测量的

  • 肌肉组织中的胶原含量(Ⅰ、Ⅲ、Ⅳ 型)
  • 成纤维细胞密度

未测量的(但更关心的)

  • 力量表现(如 1RM、最大力量)
  • 肌肉体积或截面积
  • 腱的强度或健康状况
  • 受伤率、恢复速度或其他功能性指标

换句话说,这项研究并不能说明胶原肽会让你更强、更大、更快,或者降低受伤风险。

同样,增加的内膜Ⅰ型胶原是否真的对举重者产生功能性好处仍未得到实证。结论中使用了“可能有助于”之类的措辞,显得相当审慎。

其他局限性

  • 样本量小:仅 29 人。
  • 仅招男性:不适用于女性、老年人或有伤病史的人群。
  • 单一肌肉部位:活检只取自股外侧肌,难以推断全身效应。
  • 实验周期短:仅 12 周,长期效果未知。

值得称道的是,这是一项在人类受试者身上完成的试验,而非动物或细胞实验,具备一定优势。但摘要未探讨机制,关于胶原肽到底如何发挥作用的解释仍属假设,需要进一步研究验证。

利益冲突说明

共同作者之一、基尔胶原研究所的 Steffen Oesser 曾因胶原肽功效在研讨会获得演讲酬劳,并且是与胶原肽补剂相关专利的共同发明人。其他作者声明没有商业或财务冲突。

这并不直接否定实验结果。该试验为随机、安慰剂对照,并采用活检这种硬性终点。但正因如此,独立的重复实验显得尤为重要,尤其是当收益仅限于一种胶原且样本量有限时。

实际建议

  • 剂量:研究使用 每日 15 克特定胶原肽。摘要未提及摄入时间与训练的关系,故无需刻意安排服用时机,只要保证每日摄入并坚持完整的 12 周即可。
  • 可能感兴趣的人群:已经进行 高强度阻力训练(约 70%‑85% 1RM),并对结缔组织支持有研究兴趣的举重者。
  • 需要谨慎或避开的群体:
    1. 期待显著力量或肌肉体积提升的人——该研究未报告此类结果。
    2. 女性、老年人或正在康复中的人——他们未被纳入研究。
    3. 对食物过敏或有特定健康顾虑的消费者——胶原来源于动物,使用前应咨询医师或营养师。
    4. 以为胶原肽可以取代训练的人——两组均因训练本身在力量信号和Ⅲ、Ⅳ型胶原上有所提升。
  • 产品提示:本试验使用的是 特定胶原肽(specific collagen peptides),并非市面上所有胶原粉都等价。选购时请核对配方是否与研究中的产品相符。

结论

在这项为期 12 周、每日摄入 15 克特定胶原肽的随机、安慰剂对照试验中,高强度阻力训练配合胶原肽使肌肉内Ⅰ型胶原的增幅约为对照组的三倍,这一结果通过活检得到了客观确认。但这只是一个相对有限的证据点,尚不清楚是否会转化为更大的力量、更坚韧的腱或更低的受伤风险。

因此,胶原肽可以视作一种可能有益的补充手段,而非训练的捷径或万能药。

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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