Relax sore and strained muscles. Unique spike or a smooth design provides massage to promote the recovery of tight and tired muscles. For best results, build pressure and then roll the Theragear Massage Ball from side to side or in circles to release knots and kinks. Great as a quick pre-workout warm up or anytime you need relief. Recommended areas: foot, calf, thighs, glutes, psoas, torso, neck and arms. The Massage Ball is small enough to take with you and use anywhere. Keep one at home, another at work and another in your gym bag.