Methods to maintain vitality

Warming up in the morning

There was a training method that the Ninja practiced everyday which was to support their bodies with their toes and fists lain on the ground for five minutes. By this, the Ninja trained their abdominal muscles and prevented from gaining fat around their waists.

Though it does not seem to be such a hard exercise, it is actually quite difficult to practice. You can shape up your body and spend days in a good condition if you also practice this everyday.