Dr. Gymbro
Fitness General Nutrition Recovery Science & Research Trending: supplements sports nutrition creatine pre workout recovery
A sleek aluminum energy drink can and a matte scoop of white pre-workout powder sit side by side on a pale concrete gym bench, lit by soft morning window light. The can is slim and minimalist, with a muted sage green label and no legible text. Beside it is a clear glass shaker half full of cloudy, lightly frothy liquid with condensation beading on its surface. A few fine grains of powder are scattered across the bench, catching the light. Behind them, slightly out of focus, a stainless steel barbell rests on a rack, and a folded charcoal gym towel sits at the edge of the frame. The color palette is warm neutral: oatmeal, soft gray, and sage, with a single accent of pale citrus yellow from a halved lemon wedge placed near the glass. A thin, elegant shadow from the window blinds falls diagonally across the scene, giving it an editorial, magazine-style rhythm. The composition leaves generous negative space on the right third of the frame, a smooth blurred wall in warm off-white, suitable for headline text overlay. The shot is a low-angle, shallow depth-of-field product-style photograph, as if taken with an 85mm lens at f/2. The foreground objects are tack sharp and the background melts into creamy blur. The mood is calm, clean, and modern, like a wellness or science journal feature. Subtle film grain and gentle contrast add a tactile, contemporary lifestyle feel. There are no people, no logos, and no futuristic or sci-fi elements, just a quiet, considered still life that suggests the choice between a canned drink and a scooped supplement.
Nutrition

你的能量饮料或许能当健身前补剂——但有一点关键

Dr. Gymbro · · 1 min read
#meta analysis #ergogenic aids #sports nutrition #pre workout #taurine #caffeine #energy drinks

你的能量饮料或许能当健身前补剂——但有一点关键

在众多罐装饮料和粉剂的配方表上，你一定见过 咖啡因 + 牛磺酸 这对组合。它是许多能量饮料和健身前粉剂的核心成分。但是，这种搭配究竟能否真正提升你的运动表现，还是仅仅是营销噱头？《Nutrients》（He 等，2026）上发表的这篇系统评价与元分析汇总了目前质量较高的试验，给出了初步的答案。

研究者到底干了什么

研究团队检索了 PubMed、Embase、Web of Science、Cochrane Library 等数据库，检索截止时间为 2026 年 6 月 1 日。筛选出比较 咖啡因 + 牛磺酸 与安慰剂的随机对照试验（RCT），最终纳入 11 项、共 234 名受试者 的数据。

他们采用随机效应模型对各项指标进行合并，并使用 RoB 2.0 工具评估偏倚风险。主要观察指标包括：耐力时间（time to exhaustion）、峰值或最大无氧功率、主观用力感受（RPE）、反应时间以及心率。作者声明不存在利益冲突。

有所提升的指标

  • 耐力时间：咖啡因‑牛磺酸组合相较于安慰剂的标准化均差（SMD）为 0.54（95% CI 0.03~1.05），属于中等效应，且置信区间下限刚好超过零，提示真实效应存在，只是估计精度不足。

  • 峰值无氧功率：这是最稳健的发现，SMD 为 0.55（95% CI 0.21~0.89），区间较窄且明确大于零。对短跑、跳跃或其他爆发性动作的提升尤为值得关注。

  • 主观用力感受（RPE）：感知用力显著下降（SMD ‑0.44，95% CI ‑0.83~‑0.04），即在相同工作量下运动者会感觉稍微轻松一些。这与咖啡因已知的效果相符，但本研究无法区分牛磺酸是否贡献了额外作用。

未见提升或结论不可靠的指标

  • 心率：合并后差值为 ‑0.11 次/分钟（95% CI ‑5.8~+5.5），表明该组合对运动中的心率既不升高也不降低。

  • 反应时间：合并效应看似较大（SMD ‑1.49，95% CI ‑2.78~‑0.20），但研究之间的异质性极高，预测区间跨越零，说明效应不一致，不能作为可靠收益来解读。

能量饮料的另一层面

作者还对一款市售多成分能量饮料做了次要分析，合并效应值为 SMD 0.48（95% CI 0.19~0.78），略低于纯咖啡因‑牛磺酸组合。由于市售饮料通常还含糖、其他兴奋剂等成分，这一结果 不能单纯归因于咖啡因和牛磺酸。作者强调，商业产品应整体评估，而非仅用作验证咖啡因‑牛磺酸单独作用的证据。

需要了解的局限性

  • 样本基数小：仅 11 项试验、234 名受试者，规模有限。
  • 未分离单味成分：所有试验比较的都是组合与安慰剂，无法判断咖啡因、牛磺酸各自或交互的贡献。咖啡因本身已被大量研究证实具有提升性能的作用，可能承担了大部分效应。
  • 结果不一致：如反应时间的发现显示不同研究之间差异很大。
  • 置信区间宽：耐力时间的效应估计几乎刚好排除零，说明精确度不足。
  • 措辞保守：作者使用“可能的好处”，而非确定性的结论。

实用建议

注：原文摘要未列出各试验的具体剂量，下列剂量参考自更广泛的文献，仅供参考。

  • 剂量参考：咖啡因常用增效剂量为 3–6 mg/kg 体重；牛磺酸常用剂量约为 1–6 g。对照产品标签时，请以此范围为基准，而不要默认罐装饮料的剂量恰好匹配研究用量。
  • 服用时机：咖啡因一般在训练前 30–60 分钟 摄入，这是多数运动员的常规做法，但并非本次综述的直接结论。
  • 适合人群：健康成年、已能耐受咖啡因、希望在冲刺或力量训练中获得一点提升，或想让高强度训练感觉稍轻松的运动者。
  • 需慎重或避免的人：咖啡因敏感者、孕妇、焦虑或睡眠障碍者、心律失常或高血压患者，以及在夜间训练的朋友，因为咖啡因可能影响睡眠。若有基础疾病，请先咨询医师。
  • 不要把心率变化当作效果指标：本研究显示心率基本不受影响。
  • 留意额外成分：市售能量饮料中的糖分和其他兴奋剂并未在本次咖啡因‑牛磺酸分析中得到验证，摄入时需自行评估。

结论

这项元分析提示，咖啡因 + 牛磺酸 组合可能在峰值功率、耐力时间上带来中等幅度的提升，并降低主观用力感，但对心率几乎没有影响。证据仍然薄弱，且尚不能确认牛磺酸在咖啡因之外是否具有额外贡献。若你选择能量饮料，最好把它视作一种咖啡因递送方式，可能还伴随其他成分的作用，而不是经过严格验证的健身前补剂。未来需要更大样本、分别评估咖啡因单独、牛磺酸单独以及两者组合的对照试验，才能给出明确结论。

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.

Share XFacebookLinkedInRedditWhatsApp
DG

Written by

Dr. Gymbro

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

Related Articles

A landscape editorial photograph of a lone runner's hands resting on a weathered wooden table beside a small white ceramic dish of fine white powder and a clear glass of water, shot in soft morning light. A slim matte aluminum energy drink can, unbranded with a minimalist pale sage-green label, stands slightly out of focus in the background, with a single scoop of powder dusted lightly on the tabletop. A pair of worn running shoes and a folded gray towel sit at the edge of the frame. Through a large window behind them, a blurred misty trail winds through green trees at sunrise, with warm golden light spilling across the scene. The color palette is calm and modern: creamy off-white, sage green, warm honey gold, and soft charcoal. The composition follows the rule of thirds, with the dish and glass in the lower left third and generous negative space on the right for a title overlay. The depth of field is shallow, with a crisp focus on the powder's delicate texture and tiny glints of light on the glass rim. The mood is clean, thoughtful, and quietly energetic, like a contemporary health and science magazine feature. Natural grain, subtle film-like softness, and gentle shadows give it an authentic lifestyle-editorial look. There are no text, logos, or futuristic elements, only tactile, real-world materials like wood, ceramic, glass, cotton, and metal.
nutrition

牛磺酸单独提升耐力的研究发现

BY DR. GYMBRO ·

咖啡因常被提及，但能量饮料罐中的另一种成分——牛磺酸，可能正悄然发挥作用。2018 年对 10 项研究的荟萃分析显示，单次摄入牛磺酸（1–6 克）即可提升耐力表现（Hedges' g = 0.40），且剂量和补充时长对效果无显著影响。由于证据量有限且置信区间较宽，这只能算是一个有前景的信号，而非铁律。下面介绍主要结论以及更安全的使用建议。
A wide, editorial-style flat lay photographed from slightly above on a pale oak gym bench with a soft matte finish. On the left, a small white ceramic cup of black coffee sits on a matching saucer, with a thin curl of steam rising and catching warm window light. Beside it is a second, slightly larger handleless stoneware mug in muted sage green, also filled with coffee, so the pair suggests one to two cups. In the center-right foreground rests a sleek matte-black steel barbell plate, partly overlapping a brushed-steel dumbbell with fine knurling. A folded charcoal gym towel and a clean white chalk-dusted wrist strap lie casually to one side. A small scatter of whole roasted coffee beans spills across the bench in front of the cups, glossy and deep brown. Near the bottom edge, a minimalist analog kitchen scale in soft cream with a thin black needle hints at precise dosing, without any readable numbers or text. Soft morning sunlight streams in from the upper left, creating long, gentle shadows and a warm golden glow against cool neutral tones. The background is a softly blurred, airy home gym or boutique training studio with out-of-focus squat rack uprights, pale concrete walls, and a leafy green plant in a terracotta pot adding a touch of organic color. The palette is restrained and modern: warm cream, espresso brown, charcoal, sage green, and hints of brushed silver. Shallow depth of field keeps the cups and beans tack sharp while the background melts into creamy bokeh. The composition leaves generous negative space on the right third for a title overlay, with a balanced, calm, premium magazine feel, like a contemporary wellness and sports science journal. High-resolution, natural color grading, subtle film grain, realistic textures on ceramic, steel, and coffee crema.
nutrition

举重前该摄入多少咖啡因？元分析显示 1–2 mg/kg 仍有效

BY DR. GYMBRO ·

标准的举重前咖啡因用量是 3–6 mg/kg，通常需要喝好几杯咖啡或大勺预训练补剂。2022 年对 12 项试验的元分析发现，仅 0.9–2 mg/kg 的剂量也能提升力量（d≈0.17）、耐力（d≈0.21）和平均杠速（d≈0.56）。对大多数训练者而言，这相当于一到两杯咖啡。虽然效果不算大，且数据来自单次急性实验，但结果暗示少量咖啡因同样能带来收益。
A wide editorial still life on a pale, warm-toned concrete surface in soft morning window light. In the center-left, a shallow matte ceramic bowl holds a small pile of bright red coffee cherries with glossy skins, a few sliced open to reveal pale mucilage and paired green-tan beans. Beside it, a small glass dish of fine, golden-brown powdered extract with a tiny wooden scoop resting on its edge. A sprig of coffee plant leaves, deep green and waxy, arcs across the foreground. On the right side, slightly out of focus, a sleek road cyclist's handlebar and a matte black water bottle lean against a light plaster wall, suggesting athletic training without showing a person. A minimalist analog stopwatch with a clean white face and thin black hands sits in the mid-ground, angled toward the camera, its hands paused near the fifteen-minute mark. A folded linen cloth in oatmeal beige and a single small espresso cup with a thin crema ring add quiet texture. The color palette is restrained and modern: cherry red, sage green, cream, soft terracotta, and charcoal accents. Light comes from the left, casting long, gentle shadows with a subtle warm glow and a hint of dust in the air. Shallow depth of field with crisp focus on the cherries and stopwatch, creamy bokeh in the background. Composition leaves open negative space in the upper right for a headline overlay. The overall feel is a clean, trendy health-and-science magazine cover: tactile, natural, minimal, and calm, shot in a 16:9 landscape frame with fine film-like grain and true-to-life tones.
nutrition

咖啡樱桃提取物：200 mg 咖啡因提升骑行功率 4.6%

BY DR. GYMBRO ·

摄入 200 mg 全咖啡果提取物（含同等量咖啡因）后，受过训练的骑手在 15 分钟计时赛中的功率输出提升约 4.6%。然而，关于该提取物能加速糖原再合成的说法并未得到实验验证。该随机、双盲、交叉设计的试验仅招募 12 名骑手，且由行业赞助，缺少单独咖啡因对照组。以下将阐明数据说明了什么、未说明什么，以及哪些人可能想尝试。
A landscape editorial photograph with a modern, clean magazine feel, shot on a pale warm-gray concrete surface in soft natural window light from the left. In the foreground, two matte white ceramic espresso cups sit side by side. The left cup holds a small amount of dark espresso with golden crema. The right cup is filled twice as high. Beside them, two small stainless steel scoops hold fine coffee-colored powder, one half full and one heaped, suggesting a dose comparison without any text or labels. A pair of worn red leather boxing gloves rests slightly out of focus behind the cups, laces loosely draped, with a white hand wrap rolled neatly beside them. A minimalist digital kitchen scale in matte black sits at the edge of the frame, with a few roasted coffee beans scattered across the surface. In the soft-focus background, a boxing gym corner appears: a hanging heavy bag in muted charcoal, pale wood plank flooring, and a tall window with diffused morning light. The palette is warm cream, espresso brown, brick red, and soft slate gray, with gentle shadows and a shallow depth of field. The composition follows the rule of thirds, with the cups and scoops in the lower left third and open negative space on the right for headline overlay. The look is tactile and refined, like a high-end health and performance journal. It has natural grain, subtle contrast, and a calm, confident mood. There are no people, no text, no logos, and no futuristic elements.
nutrition

双倍咖啡因对拳击手帮助有限——真相揭秘

BY DR. GYMBRO ·

你是否以为在预训练粉里加倍咖啡因就能让表现翻番？最新的交叉实验让 15 名竞技拳击手分别摄入 3 mg/kg 与 6 mg/kg 的咖啡因，结果显示更高剂量并未带来持续的额外收益。两种剂量在 60 分钟时均提升了跳高和功率，但 6 mg/kg 仅在少数指标（如弹力俯卧撑功率、膝关节扭矩）上略占优势。文中提供了常见体重对应的毫克换算、推荐的摄入时间以及研究局限，尤其要注意本研究并未直接测试拳击动作本身。

This page is available in

English العربيةবাংলাČeštinaDeutschEspañolفارسیFrançaisHausaहिन्दीHrvatskiBahasa IndonesiaItaliano日本語Basa Jawa한국어NederlandsਪੰਜਾਬੀPolskiPortuguêsRomânăРусскийSrpskiTürkçeУкраїнськаTiếng Việt中文