The answer to that question is “Yes!” Nearly all of us have at least a tiny bit of difference in the length of our legs, just as we do in the length and width of our feet. Less than .4 of an inch is considered normal, but more probing questions need to be asked. Here are better questions:
- Do you have back, hip, knee or foot issues primarily on one side of your body?
- Did you have a broken leg or surgery on your back, legs, knee or ankles as a child or teenager and are having problems with that side of the body or the other side?
- Does one of your shoulders droop to an extent that it is easily observed? Do you also have foot, ankle, knee, hip or back issues?
- If you have ever had a pressure scan of the bottom of your feet, do your feet show two distinctly different pressure areas?
- Have you had a knee or hip replacement?
- Do you limp on a regular basis without known injury or other cause?
A “yes” answer to any of these questions is a clue that you may be dealing with different leg lengths and it is involved with these problems. Leg length differences throw balance off and disrupt normal gait. Studies show that for those with leg leg differences of .4 of an inch or more, long term there is an increased incidence of back problems, knee osteoarthritis and possibly hip and ankle arthritis. If you have any of the above problems, you can see this is not an insignificant matter!
There are as many ways to measure leg length as there are people to do it! Podiatrists, pedorthists, physical therapists, orthopedists and sports injury specialists will all tell you why their way of measuring is more accurate and valid than another’s. What is key is whether a correction reduces symptoms and discomfort.
Fortunately, this is an easy fix. If a lift of more than 3/8 of an inch is needed, the lift should be on the outside of the shoe. Less than that and a rubber heel lift inside the shoe usually does the trick. Generally speaking, the lift height should be about 1/2 of the difference in the leg lengths. You can, of course, do a combination of internal and external. For more on this subject, HERE is a link to our discussion of in the Smart Reference Library.






