Commonly
runners are sidelined or limited by the presentation of leg pain during and
often after runs. The pain is usually located at the sides of the
"shin" bone and can be debilitating, even limiting the ability to
walk. Over the years, this has been a problem that I sometimes have encountered
in my running. Since I love running (and don't like not running), I have
researched over the years some ways to limit the presentation of shin splints
while training for a race, or in my case a marathon. I will discuss some ways
that we can "run smart" and limit the injuries that have been
commonly classified as shin splints.
What is a shin splint?
A shin splint can be located on the medial
(inside) or lateral (outside) of the lower leg below the knee. Medial shin
splints are commonly inflammation of the muscle attachment to the shin bone
(tibia) and hurts as from pressure to the muscle just inside the bone. Lateral
shin splints are commonly inflammation to the tendon (posterior peroneal
tendon) and adjacent tissues in the front of the outer lower leg. In either
case, the pain can present during a run, immediately following the run or
sometimes the next day.
What causes shin splints?
The exact cause of shin splints are not known,
but usually it is related to rapid increase in running or jumping (or sometimes
walking fast), changes in shoegear, or pronation (flattening of the foot). Some
secondary causes may be balance problems (leaning to one side during a run),
poor training technique (progressing too fast, poor running technique or
surfaces), leg length problems or even injury.
What I have learned...
1) Using correct shoes.
Since commonly over pronation (excessive
flattening of the foot) or over supination (increased arch height - rolling out)
can cause stress to the muscles or tendons in the area and create shin splints,
a quality exercise or running shoe will help improve and prevent these
symptoms. In choosing a shoe, price is not the most important, but cheap priced
shoes are usually cheap shoes. Get a quality shoe, designed for the exercise
you are doing (running shoe for running or walking, basketball shoe for
basketball, etc.).
2) Training smart.
As you run or train, Run Smart! Let me
explain...
If you are running on a track, understand that
always running the same direction on the track will work muscles differently
than switching directions. One of the possible causes for shin splints is
working muscles at different rates, therefore switching directions regularly
will work all muscle of the legs equally and reduce the chances for shin
splints.
If you are running on a road, most roads in
most locations throughout the country are canted (or tilted to improve water
runoff). Therefore, running against traffic always will cause supination of the
left foot and pronation of the right foot. With supination, you will work the
lateral (outside) muscles of the leg more than the medial (inside) muscles of
the leg. Pronation does the opposite. By switching sides periodically, you will
again work all muscles equally and prevent the presentation of shin splint
symptoms.
Lastly, in running smart, the speed of
training should be carefully controlled. Start slow and progress slowly to the
amount of running you desire. Give the leg muscles time to get strengthened
before forcing them into harder regimen. The speed of progress will require
understanding of how much running you have done and where you should start.
Cross training (elliptical or bike) can also help even the muscle strength as
you progress.
In all these aspects of running smart, it
should be understood that shin splints are caused by overusing a muscle group
and creating an injury. By adjusting the training to reduce this overuse, you
will have a more enjoyable run.
3) Evaluation for possible "gait"
abnormalities.
"Gait" abnormalities are best
described as running or walking abnormalities. Do you have a leg length
problem? Do you over pronate or over supinate? Do you have imbalance issues,
back problems, knee problems, or other reasons to overwork a muscle group that
may cause your shin spints?
Let me discuss some of these running issues:
Leg length abnormalities (left leg
longer/shorter than right) can be a large problem when running. The APMA has
found that running produces 4-5 times your body weight through your feet. If
one leg is shorter, the body is designed to adjust...you will pronate the
shorter foot to make it longer and supinate the longer foot to make it shorter.
This will lead to overworking the muscles and cause leg pain and possibly shin
splints. A simple adjustment to your shoes (or orthotics) will alleviate this
problem and produce continued running without pain.
Imbalance issues, often caused by weakness of
ligaments (like chronic ankle spraining) or ear problems. One of my patients is
deaf in one ear and runs lopsided (towards the deaf side) and has issues with
shin splints. With a simple orthotic, a custom item to replace a shoe insert in
your running shoes that maintains your foot in neutral position and helps the
foot function as it should, his shin splints have been eliminated.
Pronation or supination is also a form of
imbalance of the feet and can cause overuse of some muscles and may also lead
to shin splints. Orthotics are the answer here also.
By being evaluated for your running, your
"gait" abnormalities can be evaluated and often adjusted to help you
return to running without the pain.