Great for use after a workout and used by Physical Therapists, Podiatrists, and Fitness Trainers to relieve soreness and knotted muscles. Take control of muscle spasms, back pain, stubborn knots, tight joints, stiff muscles, and cramping legs with the Handheld Percussion Massager today. Handheld Percussion Massager Say goodbye to spending a fortune on massage sessions with a masseuse!.