#coffee

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A wide, editorial-style still life shot from a slightly elevated angle on a pale oak gym bench, bathed in soft morning window light. In the center sits a matte ceramic cup of black coffee with delicate steam curling upward, flanked by a small white scoop of coffee beans and two identical glass vials, one filled with a few grains of fine powder and one empty, hinting at dose comparison. Next to the cup rests a pair of worn white boxing hand wraps, loosely coiled, and a slim black stopwatch with its face softly visible. In the foreground, a minimalist notebook lies open with blurred handwritten numbers and a simple pen sketch of a bar graph with bars of equal height, subtle and unreadable, suggesting a null result without any legible text. A small brass kitchen scale sits to the side with a few coffee beans on its tray.

In the soft-focus background, a boxing gym interior is visible: a hanging heavy bag in muted charcoal, exposed brick wall painted off-white, and tall windows casting long diagonal light across the floor. The color palette is warm and restrained: cream, sand, espresso brown, soft charcoal, with a single accent of muted terracotta orange in the hand wraps and a faint sage green in the notebook cover. Shallow depth of field with creamy bokeh, fine film grain, and gentle shadows give it a contemporary lifestyle-magazine and wellness-journal feel. The composition leaves generous negative space on the left third for headline overlay. Clean, calm, trendy, and tactile, with natural textures like wood grain, ceramic glaze, and cotton fabric. No people, no text, no futuristic elements.

低剂量咖啡因咖啡对精英格斗选手冲刺表现无提升

BY DR. GYMBRO · 2026年10月23日

你真的以为赛前咖啡能让冲刺更有力吗？一项针对 15 名国家级格斗运动员的随机、双盲交叉试验发现，剂量为 1.5 和 3 mg/kg（约 68 kg 运动员对应 100 和 200 mg）的咖啡因并未提升表现。峰值功率、平均功率、疲劳指数以及估算的能量系统贡献均与无咖啡因对照没有差异。不过这只是一次样本量较小的阴性结果，不能证明咖啡因无效，而大多数显示正面效果的研究使用的是 3‑6 mg/kg 的胶囊剂量。下面列出剂量计算、研究局限以及下一次训练前该怎么做。