An ab roller is a fitness device used to strengthen the abdominal muscles, particularly the rectus abdominis, which is the muscle group that runs vertically down the center of the abdomen. It consists of a wheel with handles that the user holds while kneeling on the ground and rolling the wheel forward and backward.
Using an ab roller is an effective way to improve core strength, stability, and balance. It can also help to reduce back pain and improve posture. Additionally, ab roller exercises can be incorporated into a variety of fitness routines, making them a versatile and convenient option for those looking to improve their abdominal strength.