circuit

AleksZ Photo / Shutterstock Swiss ball; Stability ball; Physio ball; Exercise ball. It goes by many names, but the big ball that inhabits the corner of every gym is one of the most versatile pieces of equipment at your disposal. It’s not just for your core, either—the ball can be paired with...

MRBIG_PHOTOGRAPHY / Getty Assuming you’ve spent the winter months packing on mass and then springtime losing the excess body fat you put on, you’re probably looking pretty damn good by now. If so, congrats. The good news is that the hard part is over—now you just need to maintain your physique...