Spiky Peanut Massage BallThe Peanut Shape Ball is perfectly suited to giving your spine a good loosen up as it has a nice groove down the middle for your vertebrae to rest in while bulging out to give the muscle down either side of your spine a nice firm massage. You can move it up and down your spine slowly, meaning at each level it: Loosens up the muscles and other soft tissues and Mobilizes your spine at the same time if you have any neck, shoulder, or upper back pain or a