Prowler pushes are about as hardcore an exercise as you can do. Power development, conditioning, it does it all. This is my sister in law demonstrating outside out my office in Grand Rapids. She has Cerebral Palsy (CP) which effects her gait. I guess you can call this an adaptive exercise, but she does it so well, it's just exercise! She has been working this summer on getting her legs stronger before she heads off to Albion College in the fall.