Dept of Health and Human Performance, University of Tennessee at Chattanooga, USA.
J Sport Rehabil. 2009 Nov;18(4):535-52. doi: 10.1123/jsr.18.4.535.
Previous field research has not identified sweat rates (SR), fluid consumption (FC), or the efficacy of an educational intervention (EI) for youth during football camp.
To measure hydration status and rehydration performance and examine EL using these data.
Observational with EI randomized comparison.
Thirty-three boys (mean +/- SD: 12 +/- 2 y, 52.9 +/- 13.6 kg, 156 +/- 12 cm) volunteered during a 5-d camp with 3 (-2-h) sessions per day (WBGT: 25.6 +/- 0.5 degrees C).
Hydration status, SR, and FC.
Urine osmolality averaged 796 +/- 293 mOsm/L for days 2-5. Game SR (1.30 +/- 0.57 L/h) was significantly greater than practice SR (0.65 +/- 0.35 L/h; P = .002). Subjects dehydrated during free time but matched fluid losses with FC (0.76 +/- 0.29 L/h) during football activities.
Subjects arrived at camp hypohydrated and maintained this condition. They matched FC and SR during, but dehydrated when not playing, football. This may impair recovery and subsequent performance. Hydration EI seemed to have a positive influence on hydration practices.
以往的实地研究并未确定青少年在足球训练营期间的出汗率（SR）、液体摄入量（FC）或教育干预（EI）的效果。
测量水合状态和再水合性能，并使用这些数据检查 EI。
观察性与 EI 随机比较。
33 名男孩（平均 +/- SD：12 +/- 2 岁，52.9 +/- 13.6 公斤，156 +/- 12 厘米）在为期 5 天的营地中自愿参加，每天有 3 次（-2 小时）会议（WBGT：25.6 +/- 0.5 摄氏度）。
水合状态、SR 和 FC。
第 2-5 天的尿渗透压平均为 796 +/- 293 mOsm/L。比赛中的 SR（1.30 +/- 0.57 L/h）明显高于练习中的 SR（0.65 +/- 0.35 L/h；P =.002）。在自由时间，受试者会脱水，但在足球活动期间，他们通过 FC（0.76 +/- 0.29 L/h）来弥补液体流失。
受试者在进入营地时已经脱水，并保持了这种状态。他们在进行足球比赛时，能够通过 FC 和 SR 来保持水合状态，但在不比赛时会脱水。这可能会影响恢复和随后的表现。补水 EI 似乎对补水行为产生了积极影响。
