这个词是什么意思？
Physical activity which is usually regular and done with the intention of improving or maintaining PHYSICAL FITNESS or HEALTH. Contrast with PHYSICAL EXERTION which is concerned largely with the physiologic and metabolic response to energy expenditure.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D015444 · MeSH 2026。
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