Jim Rowley, Marine veteran and CEO of Crunch Fitness, stays in shape with Pilates and protein shakes on the road — and ...

A lot of people tend to pull their necks forward with their hands while crunching. Our core muscles are essential to everyday movement; we need them to walk, sit, and to lift and carry things. If you ...

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 ...

• Sit-ups target your abdominal muscles, back muscles, and hip flexors, while crunches only target your abdominal muscles. • Neither sit-ups nor crunches alone burn abdominal fat. Overall activity and ...