cross training

verb (used with object)

1. to train (a worker, athlete, etc.) to be proficient at different, usually related, skills, tasks, jobs, etc.

verb (used without object)

2. (of an athlete) to train in more than one sport.
3. to learn different, usually related, tasks, skills, jobs, etc.

noun

1. training in two or more sports to improve performance, esp on one’s main sport