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We have all heard about the man who got rid of his backache after someone told him to put something in his shoe to make his hips more level. Well, it does happen that some of us grow one leg longer than the other one.
Is it really important to have level legs? If the legs have always been different lengths, why does the back suddenly start to hurt? The answer lies in the fact that the leg length difference causes a tilt at the bottom of spine and is constant stress to the balance of the skeleton. Sooner or later, because this delicate balance is disturbed, the area becomes painful.
So how do chiropractors recognize a leg length difference. How do they determine its relevance to the backache and then treat it?
"Anisomelia" by definition is a bilateral asymmetry in lower limb length, also referred to as "Leg Length Inequality", (LLI). Click here for further information on this conditionSome of my patients are unaware that one of their legs is shorter. This usually causes problems in their knees, pelvis, back and neck. There are a number of reasons for this. Some of the leg length differences are permanent or "anatomical" and some of them are reversible or "functional".
A permanent difference might result from trauma in the past, for example fracture or it can be caused by uneven growth in childhood. In the case of permanent change - different leg length causes imbalance in all joints including the pelvis and the spine, and has to be corrected with special insoles (orthotics) to correct leg length as much as possible. If not corrected, it causes muscle tension, joint wear and tear, back and leg pain and other symptoms. When leg length is corrected, chiropractic adjustment will restore the mobility and alignment of the joints and the correct type of exercise will even out and strengthen the muscles around your joints, including the spine and the neck.
A functional difference is caused by incorrect alignment of your pelvic bones and spine or repetitive strain. It can be corrected by a chiropractic adjustment and exercise. If repetitive strain is the cause, you also need to change the habits which caused the strain. For example, one of my patients is a carpet fitter. He has carried heavy carpet rolls on his right shoulder for 15 years, his spine curved to the left, his pelvis twisted and his left leg became 1.5cm shorter. After 2 months of chiropractic care and short home exercises, his legs are now even and his spine is straight! He also has to use both shoulders in turn when carrying carpet rolls. He actually prefers using both shoulders now because he is more body-aware and enjoys being out of pain!
Problems with feet and ankles may cause your legs to appear to be different lengths and vice versa - the leg length difference often causes foot problems, including ankle weakness and foot pain.
It is very important to understand, that your feet, knees and your spine are all the part of the same structure, and to repair one part you would have to make sure that the other parts are in a great condition.
First, let us see the most common causes of leg length difference. What causes a short leg?
Causes from birth: These are not common but include:
Growth problems: These causes appear during childhood:
There are other causes. Each has to be diagnosed as accurately as possible to reach to a satisfactory solution.
Many medical researchers have concluded that even a few millimeters of leg length inequality (a quarter of an inch or less) may be a primary or contributing cause for low back or hip problems, and an obvious stress factor in the legs.
Aren't most people's left and right legs equal in length?
Most of us think the average human body is symmetrical; that if you drew a line down the middle of the body, the left and right halves would match. In fact, there is some degree of asymmetry - inequality - in everyone. Leg Length Inequality (LLI) - where one leg is either anatomically or functionally shorter than the other - is classified as a "normal variant": something that is so common, it isn't surprising when it turns up.
What's the difference between an anatomical and a functional leg length inequality?
Anatomical LLI refers to a leg which is physically shorter than the other due to unequal growth rates, fractures, or deformities. In a functional LLI situation, both legs may be identical in length (or nearly so), but one functions as if it were shorter because of either a postural imbalance in the body or uneven muscle contractions between the two legs. An example of a functional LLI could be something like this: say the structures in your right foot (arches, bones, muscles, tendons, etc.) are all working properly and holding up their side of your body in its correct and most stable position. However, your left foot has a collapsed arch, and the bones there have dropped to a less stable position, which causes your left foot to pronate (flare out) as you stand or walk. Your left leg now functions as if it were shorter because it isn't receiving the same amount of foot support as the right leg. This imbalance can cause pressure, stress, and pain in your knees, thighs, hips, pelvis, and spine (see "Functional" figure below).
Wouldn't I know if I have a short leg just by looking in the mirror, or limping when I walk?
Not always. Although many cases of LLI are very obvious and can be identified visually, a length difference of less than 25 mm (about an inch) usually cannot be detected on sight. In fact, you may have had a slight leg length inequality for years, and not even have known it.
How much difference in leg length does there need to be to affect my health?
Many medical researchers have concluded that even a few millimeters of LLI (a quarter of an inch or less) may be a primary or contributing cause of low back or hip problems, and an obvious stress factor in the legs.
If I don't know whether or not I have a leg length inequality, how can I find out?
Talk to your chiropractor. He or she has procedures which can accurately measure the length of your legs and determine whether your condition is anatomical or functional. If you are found to have an LLI condition which is affecting your postural stability, your doctor can recommend a treatment program.
How is the short leg recognized?
If the situation is more complex, then a diagnostic procedure to assess the response in the spine will be necessary. One such test can be performed using diagnostic muscle testing. The advantages of this test are numerous. It can be performed quickly and easily, requires little equipment and provides an immediate response. More sophisticated procedures exist but do not necessarily guarantee best function
If I have a leg length inequality, what can my chiropractor do about it?
First and most crucially, the effect of leveling the base of the spine must be established. Not all short legs should be corrected. Compensating for a short leg can make the distortion in the spine worse. This would exacerbate rather than improve the problem. If compensation is found to be necessary, the degree of compensation must be determined. This is achieved by using one or more of the methods described above. As you progress through the treatment, the chiropractor will aim to reduce the amount of lift in your shoe to the smallest amount possible.
Helping the body help itself: Before prescribing a heel-lift or customized orthotics, your chiropractor will correct the pelvis to encourage the body to use its natural compensation abilities. The human frame achieves this through the pelvis, which, by distorting slightly, can change the level of the middle triangular bone of the pelvis, called the sacrum. Up to one inch can be compensated in this manner. The effect of this correction will be assessed, the new lift height determined and prescribed. Wearing it until the next visit will help to correct the posture, which will be reassessed at the next visit. By doing this at each visit, the heel lift will be reduced to the minimum needed for maximum effect, the eventual aim being to have no lift if possible.
Depending on the diagnosis and treatment, your chiropractor may recommend either a heel lift as described above, or spinal/pelvic stabilizers such as a pair of customized foot orthotics to help you achieve pelvic postural balance and stability when you stand, walk, or run. Your chiropractor will select the stabilizers best suited for you based on a variety of factors (lifestyle, health, age, weight, sex, etc.). And because many people wear at least two styles of shoes (dress and casual) each day, your chiropractor may determine that an orthotic combo (two pairs) would be best for your condition. If you do have an LLI condition, ask Dr. Pisarek if spinal/pelvic stabilizers would help you.
Conclusion: There are many other problems of the lower extremities that are not mentioned here. Chiropractors specialize in the mechanics of the skeleton and can recognize these problems which places them in an advantageous position to give you appropriate advice and care. Chiropractors look at the interaction of all the joints of the leg and pelvis and understand how they affect each other. They will try to correct the problem by conservative means first, in other words, by ways that do not involve surgery.
If your problem cannot be helped by gentler natural means thru chiropractic management, then other measures such as surgery will be discussed and you will be referred. In any situation, your chiropractor is probably the best person to call on first if you suspect your problem to be one involving a difference in the length of your legs.
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I have been a patient of Dr. Pisarek for a few years now. Every morning I have to say "thank you Dr. P.!". Your care and your treatment renew my energy... no more pains in my lower back, knee and foot. With your help I lost 20 pounds and I am keeping it off. I am really grateful to you and your wife Hilda for taking care of me. My retirement got a new meaning, thanks to you.