Definition of "intensity level" [intensity level]

• The amount of energy transmitted (as by acoustic or electromagnetic radiation) (noun)

WordNet. Princeton University. 2010.

• "I remember Oprah once telling me that when she first began exercising, she’d be on the stair-stepping machine at the gym, huffing and puffing at the lowest possible intensity level, then look to her right and see the woman on the next stair-stepper barely breaking a sweat, her intensity level all the way up to the top."