【摘要】 背景:目前没有连续而精确的测量特定活动强度下的一日排水量的研究。目的:测量分析青年男性在中等活动强度的一日排水量,为每日水需求量提供参考。方法:20名男性受试者在人体能量代谢测试舱内进行23 h中等强度活动,使用高精度人体体质量秤测算23 h排湿量和排尿量,结果换算为一日排水量来确定一日需水量。同时计算一日单位体质量排湿量、单位瘦体质量排湿量和单位体表面积排湿量。结果与结论:1青年男性一日平均排水量为(3 339.7±509.9)g,排尿量为(1 982.9±449.5)g,排湿量为(1 356.7±215.6)g,饮水量和排水量呈正相关(r=0.616,P<0.05)。2每日单位体质量排湿量为(21.0±3.6)g/kg,每日单位瘦体质量排湿量为(25.8±3.9)g/kg,每日单位体表面积排湿量为(799.4±129.4)g/m2。3青年男性在中等活动强度下的一日排水量约为3 340 g,排水量受到摄入量影响,摄入水越多排出的水也越多。更多还原

【Abstract】 BACKGROUND: No studies currently focus on the measurement of daily water loss under certain physical activity level continuously and precisely.OBJECTIVE: To provide evidence for daily water requirement in Chinese young men based on the measurement of the daily water loss in Chinese young men under moderate physical activity. METHODS: Twenty male subjects were enrolled, and 23-hour whole-body sweat loss and urine output were measured using high-precision body weighting scale in whole-room indirect calorimeter. The results were converted to daily(24-hour) water requirement to determine the daily water requirement. Daily whole-body sweat loss per unit body weight, daily whole-body sweat loss per unit fat free mass and daily whole-body sweat loss per unit surface area were calculated. RESULTS AND CONCLUSION: In Chinese young men, daily water loss was(3 339.7±509.9) g, daily urine output was(1 982.9±449.5) g and daily whole-body sweat loss was(1 356.7±215.6) g. There was a linear correlation between water intake and water loss(r=0.616, P < 0.05). Daily whole-body sweat loss per unit body weight was(21.0±3.6) g/kg, daily whole-body sweat loss per unit fat free mass was(25.8±3.9) g/kg and daily whole-body sweat loss per unit surface area was(799.4±129.4) g/m2. Daily water requirement of Chinese young men under moderate physical activity is approximately 3 340 g, and moreover, water loss increases with the increase of water intake.更多还原