All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a core movement as well. It's all about positioning. One great example of this is the V-sit ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." All it takes is a tweak or two, and virtually any exercise for any muscle group can instantly become a ...

Core exercises like crunches and planks help improve your balance and posture. Side inclines with a twist and teasers target your oblique muscles. Exhaling deeply with every breath and moving from ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Sit-up haters, we've got a sit-up free workout ready and waiting for you to ...