Washboard abs turn heads, but for many guys the dividends stop there.

“That’s because they train their abs in isolation instead of thinking about how they’re meant to be used – as stabilisers,” says Budd Coates, fitness director at Men’s Health’s parent company, Rodale. So Coates developed the CoreSlider, a pair of hand paddles that glide easily across any surface, forcing every muscle in your torso to work in synchrony to stabilise your body. The result: stomach exercises that deliver a killer six-pack that also provides real-world power. The CoreSlider creates “an excellent shoulder workout, too,” says Coates, a 2:13 marathoner who regularly does the following routine to build a stronger, more balanced body.