I was so hyperactive, it was a way of getting me to exert energy to sleep at night.

He has the ability to exert energy in supporting offensive and defensive plays.

The fight or flight response when one perceives a threat helps the body exert energy to fight or run away to live another day.

While playing, members exert energy on behalf of the team (personal investment in the group).

Instead, cataphracts trotted to within a reasonable distance before charging, exerting energy only during the decisive engagement.