If you're a gym regular, you've probably seen a few videos showing you how to do an exercise properly, keep proper posture and make sure you don't hurt yourself while lifting weights.
This video is nothing like that. Damien Walters and Tim Shieff, two amazing stuntmen known for their videos of parkour and freerunning stunts, have gone to the gym, and their style of exercise is unlike anything you've ever seen.
Backflips with weights, bench-pressing a hand-standing man and some very odd ways of using the elliptical trainer are just some of the highlights from this positively crazy video.
Check it out above and tell us what you think in the comments.