"There is nothing that involves only going without returning.

It is the nature of Heaven and Earth

When there is going, there also must be returning."

"To maintain the center of the circle is to respond inexhaustibly."

Heat cramps

Heat cramps are painful, involuntary muscle spasms that usually occur during heavy exercise in hot environments. Inadequate fluid intake often contributes to this problem. The spasms may be more intense and more prolonged than typical nighttime leg cramps. Muscles most often affected include those in your calves, arms, abdomen and back, although the cramps may involve any muscle group involved in the exercise.

If you suspect heat cramps: