Shin Pain with exercise- Why we get it, how to prevent it and when to see your doctor. »

What/Where:
Typically shin pain is sharp or aching pain along the medial or lateral border of your shin bone (Tibia) where the muscles attach to the bone. The pain is worse during or immediately after exercise, better with rest, and may be tender to the touch over the affected area. This pain is commonly known as “shin splints” and in the sports medicine world “Medial Tibial Stress Syndrome.”
Athletes or people most at risk include:
1) Runners 2) basketball players, 3) gymnasts or 4) tennis players, 5) dancers, 6) military recruits, 7) women (especially female athletes) especially if they have irregular or missed menstrual periods, 8 ) exercisers with sudden changes in training, 9) anyone with some sort of metabolic bone disorder like osteoporosis, 10) anyone taking a medication that affects bone mass
Why:
1) Too much too soon too frequently: You have recently increased your intensity, duration and frequency of weight bearing exercise like running and your conditioning, tendon, ligament, muscle and connective tissue strength do not match the requirements for this higher level. Muscles fatigue and transfer stress/shock directly to the bones.
2) Your shoes are old, you have run more than 300 miles with them, or they are too stiff to begin with
3) You are not resting long enough between runs therefore your muscles and bones can’t heal, strengthen and thicken.
4) You are not nutritionally supporting the healing/strengthening/thickening process.
5) You change surface ie grass to clay courts, or treadmill to sidewalk.
6) You have a biomechanical problem that may stem from an inherent asymmetry in your body (ex leg length difference) or you have developed a bunion, blister or tendon problem that affects how you put weight on your foot and causes an asymmetric gait.
Red Flags- You need to see your sports medicine physician if:
1) Hoping on one foot hurts your shin
2) Pain is on the outside/lateral aspect of your shin or tibia
3) Nothing helps the pain except rest
4) The pain is very focal (in one place) only.
5) Swelling in your feet or ankles,
6) Bruising
7) You have irregular or missed menstrual periods
8 ) Pain that occurs during normal daily activity.
If you have any of these signs see your sports medicine physician as soon as possible. You may have a stress fracture of the bone or something else that requires aggressive diagnosis and treatment to help you return to your sport/activity as quickly as safely possible.
How to prevent:
1) Calf and Achilles tendon stretching after workouts and daily.
2) Heel walking and heel raises to strengthen your Tibialis Anterior muscle.
3) If running, replace your shoes every 300-500 miles. The mid sole breaks down and doesn’t give as much shock absorption therefore that force is transmitted up into your shins.
4) If you are just starting out with running, do not increase the distance more than 10% each week from the starting distance and frequency you set with your sports medicine physician.
5) Note: A recent study reviewed 199 studies looking at prevention of shin splints. They concluded that there were no statistically significant methods of prevention. The only method that was borderline significant was using shock absorbing insoles. Most of the studies reviewed were flawed in their methodology or were not controlled. This doesn’t mean you shouldn’t do the above, it means that they need to do better studies to see what works.
Treatment:
1) Replace your shoes if you’ve run more than 300 miles on them. Go to a good running store or sports physician that can analyze your gait and recommend the appropriate shoe for you. This is critically important for both prevention and treatment.
2) Do a lot of Achilles tendon stretching after each workout and daily
3) Ice your shins after every workout 15-20 minutes. You may repeat this hourly if you feel as long as you have 40-45 minutes between icing periods.
4) Try shock absorbing insoles. A couple good examples include those made by Spenco and Superfeet.
5) Reduce your weekly mileage if you’re a runner
6) Reduce the intensity/speed and frequency of workouts. Try doing a “Run/walk” routine with 60 seconds of running and 90 seconds of walking to start. This gives the muscles, tendons, ligaments and bones a chance to recover, and you still get the full mileage completed.
7) Return to a softer surface for some or all of your training.
8 ) Start running in the pool since you are 5% of your body weight in the water, therefore less impact is felt on your bone and joints but will still get the cardiovascular benefits of running on land.
9) You may need to take time off from your sport. Try cross training.
10) If you have irregular or skipped menstrual periods, the underlying cause is often a caloric deficiency causing an lack of energy availability so try and eat more calories. You should see your physician to figure out why your periods are irregular.
11) Nutritional support: Make sure you are getting 1000-1500mg of dietary calcium per day (dairy, collards, spinach, fortified cereals or orange juice). In addition, you must have 400 IU of dietary Vitamin D (Salmon, tuna, mackerel, fish oil, fortified dairy or cereals). Eat about 0.8-1.0 mg/kg of good quality protein per day (lean meats, fish, tofu, milk, eggs, cheese).
12) If your symptoms do not improve with the above, you must see your sports medicine physician to rule out other causes of shin pain and to diagnose and treat a gait abnormality.
As you can see, there is much you can do to prevent and treat shin splints but remember the “red flags” and see your physician if you have any of them or you don’t improve with the modifications I discussed. I hope this helps! Get out there and shape up!
References:
1) Stress Fractures of the foot and ankle- http://orthoinfo.aaos.org/topic.cfm?topic=A00379
2) Craig, D. Medial Tibial Stress Syndrome: Evidence Based Prevention – http://www.nata.org/jat/readers/archives/43.3/attr-43-03-316.pdf. Journal of Athletic Training. 2008;43 (3):316-318



As a sports medicine physician, I often get asked how to start an exercise program and how to keep up with it. While there are many recommendations regarding this seemingly simple task, my experience is that too much information can be daunting to those just starting out. Therefore, I will attempt, with the help of the American College of Sports Medicine (ACSM), “Exercise is Medicine” initiative, and the American Heart Association (AHA) to boil it down to ten practical tips.

