Add Yahoo as a preferred source to see more of our stories on Google. Our core is made up of four muscle groups that are essential to everyday movements, like walking and lifting. And when people ...

According to experts, it takes just four core workouts to absolutely rip your top half to shreds, so you can get stronger.

Our core is made up of four muscle groups that are essential to everyday movements, like walking and lifting. And when people think about core strengthening, crunches are often the first thing that ...