The reverse crunch is an intermediate level variation of the popular abdominal crunch exercise. Your upper body remains on the mat as you contract your abs to draw your legs towards your chest. It exercises the full length of the rectus abdominis muscle (the six-pack muscle), getting to the deep lower abs.
Barbell Ab Rollout Exercise
How do you do a barbell ab rollout? Abdominal Barbell Rollouts Instructions: Kneel on the floor/mat and grasp the barbell with a shoulder width grip. (You can do this with a loaded or unloaded barbell with 5 or 10 lb plates on each side of the barbell. Be sure to put plate clamps on if using weights.) Keeping your back …