Hydration Status Monitoring

This paper reviews widely used indices of hydration status in humans. For the purposes of this review, euhydration will refer to normal total body water TBW, whereas hypohydration will refer to a body water deficit. The term dehydration will be used to refer to the dynamic process of body water lossi.e., the transaction from euhydration to hypohydration. Greenleaf and Sargent, 1965 Sawka, 1992. The term hypovolemia will define when blood volume is less than normal. Both physical and cognitive performance are impaired proportionally to the magnitude of-body water loss incurred Gopinathan et al, 1988Sawka, 1988. However, even small losses of body water 1-2 percent body mass BM have a detrimental impact on physical work and negatively impact human thermoregulation,