Because the spinal cord is housed by the spine and the exiting nerve roots communicate with the autonomic nerves that basically run our organ function, maintaining alignment of the spine and pelvis is very important to minimize nerve irritation and subsequent health-related problems.
Leg length plays and important role in posture. When there is a difference in leg length, it is usually because the pelvis is twisted. The pelvis cannot maintain a level position, and because the spine’s base is the pelvis, it cannot stay straight if there is a leg length discrepancy. This will in turn throw everything off. People can even experience shoulder or knee pain from the pelvis being off and in turn leg length being uneven. One give away is when a patient says they have pain turning in bed.
A pelvis can get twisted thereby effecting leg length from many different activities such as sleeping wrong, getting in and out of the car, or lifting improperly. You may or may not experience any pain at first in your pelvis or low back.
The way chiropractors check leg length discrepancy is by having a patient lay face down and checking the heels. You can check this as well at home. If one heel is shorter or longer than the other, it is a good sign that the pelvis is twisted and the person needs an adjustment.