The slendertone arms accessory is clinically proven to shape and firm the arms in just 6 weeks ems technology has been used for over 50 years in sports and medical environments to strengthen and rehabilitate muscles slendertone arms use patented technology able to target and exercise all the muscles of your arms the biceps and triceps independent clinical study has proven after 6 weeks use 89 of users reported their arms were more defined 72 reported that their arms and muscles were fi