One of the first exercises I did when I started CrossFit was this move called an AbMat sit-up, named after the mat you place under your lower back for support. I couldn't believe how sore I was for ...

Grab a pair of dumbbells for this at-home workout that you can rip through in 15 minutes. It's short but intense, and targets your arms and abs for that wonderfully sore feeling you'll love tomorrow ...

Trainer Will Lainer has a 4-minute Tabata workout to engage your whole body that you can do at home. No excuse for skipping your workout now Released on 04/07/2014 (rock music riff) Hi I'm Will and ...

Doing a bunch of sit-ups is not an abs workout. Our abdominal muscles perform three distinct movements: they flex our spine, they twist and they brace to control posture. A comprehensive abs workout ...