Once you've gone through Hell's Hollow with us, get ready for another belly button that will put your core to the test. This challenge for the hollow body rocks adds some extra preparation to make the effects more animalistic – which is only an advantage for your situation in the six-pack.
First, use the uneven hollow body rock to improve the stability of your core. Although there are no weights, it will still be tough. "With this arm to one side, the dynamics to the hollow rocks will always drop somewhat," says Men's Health Fitness Director Ebenezer Samuel, C.S.C.S.
But you start first. The challenge becomes interesting when you add Alligator Scrolls, a movement reminiscent of the killing maneuver of the great reptile. "They'll think this is easy, but it's quite difficult and nuclear-intensive," says Samuel. "You do not just turn around, you try to turn around without your legs or arms, you stay on the ground all the time."
All you need to perform the uneven hollow body-gator-roll challenge is plenty of room to rock and roll. Just make sure there's no one you might accidentally dump into too narrow workspaces and you can get started.