The Iliotibial Band (ITB) [also known as the fasciae latae] is a thickening of the fascia, or the outer casing
of the muscle, that runs up the outside of the thigh. Fascia is like a sausage
casing and the ITB is a thickening of that sausage casing. It originates up by
the top of the hip and ends on the outside of the knee. You can feel your ITB
when you stand. It causes the outside of your thigh to become very firm and
tight while your thigh muscles remain more relaxed. In fact, that's one of the
reasons we have an ITB - it holds our legs straight when we stand, thereby
allowing the bigger thigh muscles a chance to rest.
The two main
muscles that are addressed when dealing with ITB syndrome are the Gluteus Maximus (the buttock muscle) and the Tensor
Fasciae Latae (TFL) muscles. The
TFL muscles is just a little guy but it does most of the work while we stand,
thereby allowing the big guys to rest. You will sometimes hear ITB syndrome
referred to as TFL syndrome - the two terms are synonymous.
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Lateral (outside) knee pain - NOTE -
very few conditions, other than a ligament sprain, will present as lateral knee
pain therefore this alone is often diagnostic.
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Pain is often worse after running, especially after climbing hills and
often aggravated by climbing stairs
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Pain may not be present until mid-way through a run, often not until
climbing a hill
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Pain can literally bring a runner to his/her knees
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Sometimes associated with a 'snapping hip', in which the muscles that
cross the outside of the hip can be felt to snap or click during walking or
running.
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Pain may also present as lateral thigh pain more so than knee pain but
is rarely focused primarily in the hip or gluteal
muscles.
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Can often be attributed to some form of over-training - doubling one's
mileage, sudden increase in hill repeats, etc.
The lateral
knee pain is being caused by the ITB pulling up on it's insertion on the
outside of the knee. Underneath the ITB near it's insertion at the knee is a
bursa. Bursae are fluid filled sacs that lubricate
areas where rubbing and friction occur. When that ITB was pulled tight it put
too much pressure on the bursa and that bursa reacted by becoming inflamed and
swollen, giving you pain.
The ITB was
pulled tight by one of the two muscles mentioned above - the TFL or the Gluteus
Maximus. Running up hills, for example, uses more of
the glutes than running on flat ground,
therefore it will often trigger a bout of ITB pain. That also explains why the
pain is often aggravated by hill repeats. The ITB can also be aggravated by
running on uneven roads or on tight indoor tracks, running in poor running
shoes or if your foot pronates (arch collapses).
If there was
an underlying problem with pelvic mechanics, this may have contributed to the
ITB problem. Just think about it! You run with both
legs equally - why would one leg get ITB pain and not the other?
First off, if
you have faulty pelvic mechanics you'll have a lot of trouble getting rid of
ITB pain on your own. Stretching probably won't do it alone. So, if you've been
dealing with ITB for more than 2 weeks with just stretching, ice, exercises,
etc. and you're not improving much, have a chiropractor check your pelvic
mechanics.
We
have seen numerous patients who have tried TFL stretching, ice, ultrasound,
etc. over the outside of the knee with little success. That's because the
problem is not at the insertion in the knee - that's just where the pain is!
The problem is higher up. And with that said, it's also important that you
remember which muscle is the bigger of the two and which muscle works more when
we climb hills. The
Gluteus
Maximus is often overlooked as a major contributor to
ITB Syndrome. I can't
count the number of patients I've seen who didn't improve until they started
stretching their Glute Max as opposed to just the
TFL. Anyway, here's a useful plan in a nutshell.
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Address faulty pelvic mechanics
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Reduce or stop running (especially hills) until pain has disappeared.
Maintain fitness with cycling, water running, roller blading
or any other activity that does not increase symptoms
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Use ice over outside of the knee when pain is severe
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Stretch the Glutes and TFL muscles
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Self-massage over the outside of the thigh, or deep massage of the glutes is also useful
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Use hot tubs or Epsom Salt baths to loosen the muscles before
stretching.
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Address any potential faulty foot mechanics (pronation),
get the right pair of running shoes for your foot and/or orthotics
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Return to running gradually. Build up slowly to pre-injury training
level. Add hills gradually.
For
more information go to the American Academy of Family Physicians