The crossed-arms crunch is a basic body-weight exercise that strengthens the core and hips. Crossing the arms helps to prevent pulling the neck forward.
Instructions
Lie flat on your back and cross your arms across your chest. Bend your knees and firmly plant your feet on the floor. This is your starting position.
Brace your core and lift your shoulders and upper back off of the floor. Hold at the top for a second and then retract back down to starting position.
Trainer’s Tips
Don't come up too high. Raise your torso just enough to get your shoulder blades off the floor.
Make sure to lower your torso to the floor at the end of each rep.
