THE ROLLGA PERCUSSION MASSAGER SPEEDS UP RECOVERY. The Rollga Percussion Massager helps to relax all muscle groups and tendons, activate blood circulation, and relieve overall muscle fatigue. High-frequency percussion can relieve soreness. 6 REPLACEABLE MASSAGE HEADS. The Rollga Percussion Massager includes a spherical head for massaging arms, back, hips, thighs, hamstrings, and calves, a U-shaped head for targeting the soft tissue in the neck, spine, and Achilles’ tendon - bringing relief to common tight areas, a cylindrical head for impacting deep tissues such palms and feet, and a flathead is for muscle relaxation and plasticity. ADJUSTABLE SPEED LEVELS The Rollga Percussion Massager massage head works at an amplitude of pulses per minute with 20 different frequency settings.