This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Playing sports places demands upon the bodies and minds of athletes. Athletes' abilities to meet these demands affect how well they perform. Food, rest, drink, and other factors can affect an athletes' success. This study explores the effect of dehydration on how well a basketball player's body and mind performs. Dehydration is when the amount of water in the body is less than normal. This study has 6 trials. Four trials look at the affect of 4 states of dehydration on playing basketball. These trials cause dehydration by having the player workout in a hot room until the desired amount of his body's water is lost through sweating. The amount of water-loss is tracked by weighing the body before and during the workout. Two more trials look at the effect of 2 drinks (sports drink and flavored water) on how well players perform. The amount of water in the body stays normal for these 2 trials. All trials use basketball drills to create a mock basketball game to test how well the player's body performs. Also, this study uses a computer program to test the player's alertness and thinking. A blood sample is taken to make sure that the player is able to be in the study. Other blood samples track changes caused by dehydration and drinking. For each trial, the player swallows a special pill that measures the warmth inside the body.
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