Exercise (7)

One of the merits of swimming is that one rarely feels the load of the gravity. One can move the body freely because of feeling no gravity, but in other words, the amount of exercise is prone to be increased. In addition, the resistance of water is rather strong, one tends to feel more fatigue than exercise on the ground.

Fatigue means that the body heat is consumed. Staying in the water, which temperature is lower than the body temperature, for a long time leads to consumption of the body heat. Warming-up exercise before entering in the water is absolutely necessary to raise the body temperature in advance.

*This article is translated from "Yamai hitokuchi Memo" written by Shoji Kobayashi, 2005.