高校生アスリートの安静時および運動時2時間の水分出納評価

This study was conducted to assess water balance under 2h-sedentary or 2h-exercise training in 8 athlete high school students. Whole-body sweat loss（WBSL）was calculated using this Equation［WBSL（L）=（Pre-exercise body mass（kg）−Post-exercise body mass（kg））+Fluid intake（L）−Urine output （L）］. Urine and WHSL decreased and increased from 249±117 ml and 306±155 ml in 2h-sedentary to 64±34 ml and 1764±1243 ml in 2h-excercise training, respectively. In conclusion, sweat losses became a major factor in whole-body water balance in exercise training.