How is it that a softball pitcher can throw day after day?

Answer 1

well if a pitcher just starts off and throws for a long time her arm will be sore, but if she is used to it, she will be okay to through for a decent amount of time and will have to ice her arm.

Answer 2

They do in little league, but the action of pitching a softball is less harmful to the body than an overhand pitch, asa and usssa haven't seen the need for it as yet, there is not enough data on injuries due to extended pitching underhand.