Data coming from recent studies suggest that total body electromyostimulation (WB-EMS) is a personalized and effective intervention, also in terms of time, for chronic back pain in the lumbar area. The objective of this non-randomized controlled study was to compare the effectiveness of WB-EMS training and the association between specific WB-EMS training with Well Back System [WBS] passive stretching on pain. Forty patients with chronic pain, aged 43 to 81 years, were assigned to one of two groups: WB-EMS (n=20) and WB-EMS+WBS (n=20). Both groups completed 12 sessions (8 weeks) of the WB-EMS protocol (2×20 minutes per week). The second group performed core-specific exercises with WB-EMS plus 6 extra stretching sessions (30 minutes each).