<p>This paper presents the development of an ultra-lightweight, ultra-low-power lumbar support robotic device designed to alleviate low back pain (LBP) in elderly and weak individuals. The robotic device utilizes an electroadhesive clutch, which reduces energy consumption and weight compared to conventional actuators. The proposed robotic device employs dynamic control to adjust support based on the wearer’s lumbar movement, using an inertial measurement unit (IMU) sensor to modulate intra-abdominal pressure (IAP) and enhance spinal stability. The concept of the neutral zone (NZ) is applied to determine the range of motion where the robotic device operates, ensuring that the clutch is disengaged within the NZ where no support is needed and engaged outside the NZ to provide necessary assistance. Experiments conducted on a dummy model simulating human lumbar movements demonstrated the robotic device’s effectiveness in modulating abdominal pressure and providing adaptive lumbar support. This indicates its potential as an effective assistive device compared to conventional braces.</p>