how does dehydration affect your body
1. Fatigue Sets In. When the body suffers from chronic dehydration, blood flow and blood pressure drop due to a lack of water and oxygen in the blood. Basically, dehydration results when the body loses more water than it takes in. This naturally causes the muscles and nerve function to literally burn out due to profuse sweating after exertion.
Even being slightly dehydrated affects your ability to put effort into your workout. A 2% dehydration level in your body causes a 10% decrease in athletic performance, says Goodson. And the more dehydrated you become, the worse performance gets..