Water is the solvent for biochemical reactions. The human body cannot function without sufficient water, which is why athletes can die from dehydration.
- Your body needs water for a variety of reasons, including to:
- moisten food (saliva)
- digest food (gastric secretions)
- transport nutrients to and from cells (blood)
- eliminate waste (urine), and
- dissipate heat (sweat).
Blood is 93 % water and Muscle is about 73% water.
Water lost during exercise should be replaced during and after exercise.
Those who exercise in a humid environment should most certainly consume more water to combat the increased fluid lost as sweat due to that humidity.
Dehydration has been linked to headaches, moodiness, and decreases in concentration, athletic performance and endurance.