Depending of amount of muscle in the body, water constitutes 55 to 70 percent of body weight. Athletes, who maintain fluid balance during exercise, are reached optimal performance and when they lose fluid a lot they lose their performance at the same time. In addition, due to the loss of excess fluid in athletes some life-threatening deformation is observed.
Athletes should begin to exercise with sufficient amount fluid in the body. Scientists recommend drinking 400-600 ml fluid 2-3 hours before the exercise. This implementation provides optimal fluid balance and gives time to urine excretion of excess fluid.
Sports drinks are recommended for athletes because it reinforces the body with carbohydrates and some minerals, which lost with sweat.
Sports drinks are suitable for use during training sessions or competitions that last at least for an hour. Also, these sport drinks should include 4-6% of carbohydrates.
An ideal sports drink that fits everyone has not been found yet. Personal taste, physical characteristics and lots of different factors matter when picking the right one. Drinking water is surely better than getting no fluid at all, but water does not contain enough salt and minerals. So, sports drinks may be need for long activity.