How Mild Leg Length Differences Can Contribute to Low Back Pain
Step Rite Shoe Lifts
A shorter leg tilts the pelvis, and the spine bends to keep the head level. Over thousands of steps a day, one side of the low back carries more load. A lift on the shorter side levels the pelvis in the shoe.
The chain from foot to back
Short leg, tilted pelvis, side-bent spine, one-sided load. Each link is small. Multiplied by every step, the load adds up on the muscles and joints of one side of the low back.
What the evidence shows
A systematic review of leg length discrepancy studies found that patients with a measured difference who wore a lift reported less low back pain and better function. Clinicians see the same thing in practice, which is why a lift is the first thing most of them prescribe.
Why the lift goes under the sole
An insert inside the shoe raises only the heel and is limited to about a half inch. A lift built into the sole raises the whole foot, so the pelvis levels without pushing the heel up out of the shoe, and it works at any height.
Wearing it all day
The back feels the difference whenever the lift is off. Work shoes, house shoes, and exercise shoes all get the same height, so the body meets one height all day. "It has saved my back and I can walk and hike in comfort," wrote one long-time lift wearer on a hip replacement forum.
