Here is a post I did well over a year ago. I am reposting it due to the hot, humid weather we have encountered over the past couple of days. And now that summer is coming upon us, it is vitally important to stay well hydrated before, during, and after working out.
Water is an important substance that is required for pretty much everything done in the human body. It allows for chemical reactions to occur, lubrication, nutrient & vitamin delivery (in the form of digestion), waste disposal, heat dispersion, and temperature regulation.
The adult human body is composed of 45 - 60% water. The brain is made up of over 80% water. Muscle is composed of 80% water whereas fat is only 20%. As a result, the lower a person's body fat percentage, the higher the percentage of water.
