For the human body water is the most important nutrient. Water makes up about 60% of the average person’s weight but can range from 45% to 75% (Campbell & Spano, 2011). Euhydration is a state in which the body water content is adequate to meet a person’s physiologic needs. Hypohydration, a state in which body water content is insufficient and hyperhydration, when the body water content is in excess, both present potential dangers (Campbell & Spano, 2011; McArdle, Katch, & Katch, 2014; Tipton, ed., 2006). Dynamic exercise, especially endurance exercise, causes increases in volume in most fluid compartments when compared to sedentary counterparts (Tipton, ed., 2006). Shifts in fluid volume…
Hydration and fluid replacement is critical to athletic performance (1). I’m not talking about your walk in the local park, but intensive activities that last longer than 1 hour. I hear many theories on how much water one should drink during sporting events and many are “one size fits all” in nature. Intense activities lasting longer than an hour will require a specific re-hydration strategy. This applies for both hot and cold environments. It is clear that starting your exercise session dehydrated is one of the leading causes of heat-related illness.