Forget elaborate and expensive diagnostic tests to determine your health. According to experts, a simple at-home workout move could reveal how fit your body is for your age. Sit ups are a good ...

Training my abs is always tough, so I figured why not push it even further? I swapped out the usual sit-ups and Russian twists for a four-move dumbbell workout to really spice things up.

We’ve said it before and we’ll say it again — when it comes to building a rock-solid core, endless sit-ups and planks alone won’t do it. Not only does switching things up help you beat ...