The revolutionary weighted arm sleeves improve speed and power through functional strength training based on small increases in resistance to target sport-specific muscle groups. Unlike other weighted training aids, Hand Speed Trainer™ puts the resistance on the body, not the equipment, allowing increased performance without negatively impacting mechanics. The resistance in the weighted sleeves can be increased from 4 oz to 24 oz in 4 oz adjustments. The ability to increase the resistance of each HST sleeve ensures a safe, yet high-intensity training program for athletes of all ages.