"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you're looking for an exercise that will amp up your abs routine, look no further. The Russian twist ...

Medicine ball Russian twists are great for working the obliques and strengthening the core. Sit back-to-back with your ...

Trunk rotations involve twisting the torso while keeping the lower body stable. This movement targets the muscles around the ...

Jakob Roze, CSCS, is a health writer and high-end personal trainer. He is the founder and CEO of RozeFit, a high-end concierge personal training practice and online blog. Your obliques are the core ...