The Crunch is one of the most common abdominal exercises. It primarily works the rectus abdominis, which extends up the middle of your abdomen.
- Lie on your back.
- Place your hands behind or beside your head.
- Keeping your feet flat on the ground, bend your knees at a 90-degree angle.
- Using your abdominal muscles, pull your upper body up until your shoulder blades are a few inches from the ground.
- Slowly return to your original position.