From the manufacturer Stamina InLine Traction Control System The InLine Traction Control System is the solution to middle and lower back, hip and sciatic nerve pains. The entire movement can be accomplished from a flat position, making the Stamina InLine Traction Control System ideal for for those with limited mobility or other medical issues. The Traction Control System also helps improve posture and alignment. Adjustable comfort elements makes the Traction Control System supportive and stable on your body.