H2O

Water is very important for living creatures on this earth including pianists. If you are dehydrated, you get easily exhausted. And you go no where. It is almost like a car without fuel. Even if you get a breakfast so rich in vitamins and various nutrients but not drinking water, you are wasting yourself and the breakfast.

Water is a solution for most vitamins and an element to burn your food for energy. For an intense activity like performing on piano without a music score, you can easily imagine how much calorie is burnt. You need calories burning for anything happening in your brain like retrieving the memory of the music scores, you need calorie for striking an action on piano. You know you need a good diet and that includes water.

When you feel tired or exhausted in a practice session, take a break, go get some water and fresh air, before continuing. You will realize it makes a big difference.