This simple floor exercise is redefining how Americans train their core—without crunches, machines, or strain on the spine.

Add Yahoo as a preferred source to see more of our stories on Google. If you’re looking to sculpt some killer abs and increase your core strength, you might first turn to crunches. Hey, it’s a habit.

Karen Voight can be reached at kvoightla@aol.com. A simple and easy way to work your side torso muscles is to turn sideways and perform side crunches. If the movements are done properly, you won’t see ...

Denise Austin just shared a motivational workout video on Instagram. The 66-year-old demonstrated a “three-minute” workout to strengthen abs. The fitness star demonstrated a total of five simple moves ...