You could live without food for 30 days but, depending upon various conditions, you could survive only four to 10 days without water.
Water is second only to oxygen as essential for life.
S Water is without doubt the most important nutrient for an athlete . Odd as it may sound, your body is made up primarily of water. A muscular athlete is about 70 percent water. In exercise, your muscles work extremely hard and create energy. A by-product of that energy production is heat.