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In the middle ground, slightly out of focus, a pair of worn running shoes in muted sage and cream tones sits on the edge of the table, laces loosely undone. A simple analog stopwatch with a clean white face lies beside them, its hands frozen at a moment suggesting a close finish. A folded linen towel in warm oatmeal tone drapes casually nearby.

The background is a softly blurred outdoor setting seen through a large window: a quiet tree-lined running path at dawn, with golden-hazy light, dewy greenery, and a faint mist. The color palette is calm and modern: deep emerald, sage, cream, warm wood, and touches of soft gold. The composition leaves generous negative space on the right side for headline text, with a shallow depth of field, crisp detail on the powder texture, and a clean, minimalist, lifestyle-magazine aesthetic. Subtle film-like grain, natural shadows, and a fresh, healthy, energetic mood. No people, no text, no logos.
Nutrition

螺旋藻让跑者坚持时间延长32%——但有个陷阱

Dr. Gymbro · · 1 min read

抢眼数字

在为期四周的螺旋藻补充后,跑者完成一次两小时高强度跑步后,全力冲刺时间约延长 32%(约 39 秒),这也是《Medicine & Science in Sports & Exercise》双盲交叉试验的标题之一,解释了为何蓝绿色藻类经常出现在耐力运动员的补剂配方中。

然而,完整的实验结果比标题更温和,也更具参考价值。

研究:研究人员到底做了什么

一个希腊团队(Kalafati 等,2010)招募了 九名中等训练水平的男性。实验采用双盲、安慰剂对照、交叉平衡设计。每位受试者 每天摄入 6 克螺旋藻,持续四周,随后进行四周的安慰剂期。

每个阶段结束后,受试者完成以下高强度跑步方案:

  • 2 小时,强度为 VO₂max 的 70–75%
  • 紧接着 95% VO₂max 直至力竭

研究人员记录了跑步过程中的表现与呼吸商(用于判断燃料比例),并在运动前、立即后以及 1、24、48 小时后抽血,检测氧化应激相关指标。

结果:32% 从何而来

关键数据如下(原文报告):

  • 两小时跑后至力竭的时间:安慰剂组为 2.05 ± 0.68 分钟,螺旋藻组为 2.70 ± 0.79 分钟,约 提升 32%(约 0.65 分钟,即 39 秒)。
  • 脂肪氧化:在两小时跑中提升 10.9%。
  • 碳水化合物氧化:下降 10.3%。
  • 还原型谷胱甘肽(GSH):在静息以及运动后 24 小时,螺旋藻组水平更高。
  • TBARS(脂质过氧化标志物):安慰剂组运动后升高,而螺旋藻组无显著变化。
  • 蛋白羰基、过氧化氢酶和总抗氧化能力:两组变化相似,未见显著差异。

因此,抗氧化效应是真实的,但并非全局提升;部分指标倾向于螺旋藻组,其他则无差异。

为什么可能有效?

作者提出了两种合理的机制,均未在本研究中直接得到验证。

1. 向燃烧脂肪的转变

在长时间跑步中碳水化合物氧化率下降、脂肪氧化率上升,暗示身体稍微更多依赖脂肪供能。理论上,这可以保存一部分糖原——当跑到两小时后,剩余的糖原或许能在最后冲刺时提供额外能量。该解释合情合理,但研究并未直接测量肌肉糖原储备。

2. 抗氧化支持

螺旋藻富含藻蓝蛋白等化合物,具有抗氧化活性。GSH 升高以及 TBARS 被抑制,表明运动诱导的脂质损伤可能减轻。但这是否会转化为更好的表现仍未可知。

注意事项:购买前请先阅读

以下是标题背后的现实检验:

  • 样本仅九人。小样本易产生假阳性,且难以推广到女性、年长运动员或精英选手。
  • 交叉设计。虽能让每位受试者充当自己的对照,但并不能弥补样本量不足的缺陷。
  • 绝对收益微小。提升约 0.65 分钟,即约 39 秒的全力冲刺时间。相对的 32% 看起来很夸张,但实际的冲刺时间只有几分钟。
  • 并非赛果。力竭时间测试敏感且波动大,不能直接等同于马拉松或 10 km 的成绩提升。
  • 抗氧化指标并不全好。多项抗氧化标志物在两组间无显著差异。

结论是:这是一条有趣且具潜力的信号,但不足以断言螺旋藻能彻底改变比赛表现。

实用要点

剂量

研究使用 6 克/天。由于剂量较大,很多人会把它分成两到三次服用。实验验证的是每日总量,而非分次方式,所以分次仅为提高耐受性考虑。

时机

这是 慢性 干预:每天连续 四周,而非赛前一次性摄入。不要指望单次摄入就能立刻提升训练表现。如果决定尝试,请坚持完整一个月后,再用自己的训练数据评估效果。

适用人群

  • 耐力运动员:跑者、骑行者、铁人三项选手,尤其是那些进行长时间平稳训练后还要来一次高强度冲刺的人。
  • 长时间训练的有氧爱好者:任何训练时长超过一小时的人,都可能对脂肪氧化的潜在提升感兴趣(虽本研究仅涉及跑步)。
  • 短跑或爆发性训练者:目前的数据并不支持对冲刺型或低容量力量训练者有显著益处。

质量很重要

螺旋藻在水中培育,若批次受污染可能携带重金属或微囊藻毒素。请选择 经第三方重金属和污染物检测并附有检测报告 的产品。廉价、未经验证的粉末风险不值得冒。孕妇、患自身免疫疾病、苯酮尿症或正在使用药物者,请先咨询医生。

结论

螺旋藻不是灵药,但本研究显示它可能轻度把燃料使用倾向转向脂肪、提升谷胱甘肽,并抑制部分运动诱导的脂质损伤。对追求边际收益的耐力运动员而言,它是一项成本不高、值得尝试的实验。但务必保持现实期待:标题写 32%,计时器显示约 39 秒,且仍需更大规模、更具多样性的研究来确认。

来源:Kalafati M 等. Spirulina supplementation in humans: ergogenic and antioxidant effects. Med Sci Sports Exerc. 2010;42(1):142‑151. PubMed | DOI

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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