A weight-cut (dehydration/rehydration) control calculator: estimate required dehydration/rehydration from target weight and weight-class, and flag a safe weight-loss range for weigh-in sports.
运动后称重下降主要反映脱水：补液量≈体重差×补液系数（常取 1.2–1.5 L/kg）。建议 2 小时内分次补齐，避免一次性大量饮水增加胃肠负担。
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Dehydration effect | a two percent body mass loss already impairs endurance | ACSM position stand |
| Fluid replacement | replace the mass lost plus intake minus urine output | ACSM position stand |
| Weight loss rate | aim for 0.5 to 1 percent of body mass per week | Sports nutrition practice |
减重（脱水/补液）控制。体育竞技工具，帮助计算与分析运动数据。