Add Yahoo as a preferred source to see more of our stories on Google. Unlike regular crunches, which require lifting the upper body off the ground, reverse crunches involve lifting the hips and legs ...

Carve out just nine minutes a day, five to six times a week, and watch how your core transforms.

Celebrity trainer Erin Oprea loves to turn fitness “into a game or into a party,” the Nashville-based trainer to Carrie Underwood, Kacey Musgraves, Kelsea Ballerini, and Jana Kramer, among others, ...

Strengthening the core is one of the most beneficial things you can do for your body. The core muscles connect the upper and lower limbs, so maintaining strength in that region is vital for everyday ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." If your body were a bicycle, your abs and back muscles—your core—would be the frame. You need a ...

How do you get a flat tummy? You’ll need more than the standard crunch says our expert, exercise physiologist Richard Weil, who answers this reader’s question. The opinions expressed herein are the ...

Core strength testing has come a long way from the straight-legged, twisting sit-ups used before World War II. We've moved on to bent-knee sit-ups, to crunches and now to the plank pose or hanging ...