Training — Shin Splint or Stress Fracture?

running advice bug Training    Shin Splint or Stress Fracture?One of my runners sent me an inquiry today that I get all too often. While suffering from pain in her shin, she asks if I think this is a stress fracture or a shin splint. Below was my reply to her, which others may find helpful. I use an analogy below to a pane of glass to help explain how a stress fracture forms and then what happens if with continued running on it. First, her question:

“….I have either a tibial stress fracture or a posterior shin splint… I’m hoping it’s just a shin splint, but my gut is telling me it’s a stress fracture… I have an x-ray scheduled for Friday… Running is unbearable right now. I tried it yesterday after taking a week long break and I felt like I was limping the whole time, so I figured I should stop. Instead, I did 30 minutes of intervals on the elliptical.

I don’t want to take 6-8 weeks off if she tells me that it is indeed a stress fracture. My dr’s a runner too so I think she’d understand my frustration. Is there anything you would suggest to speed recovery? How do I keep up with my current fitness level without running? This is the first time I’ve ever had anything like this…”

Oh, how often I’ve had this question. The first thing that I want everyone to read is that if you are in this situation, please go see your doctor. As I’ll explain below, although stress fractures are much less common than shin splints, they are very serious injuries. If you continue to run on a stress fracture, there is a strong possibility of doing permanent damage and there is no reason to inflict that on yourself. So now that you’ve all read my caution (go see your doctor!), I’ll answer the question.

For the sake of definitions, a shin splint is an inflammation of the tissue running along the bone in the shin. Shin splints develop when the muscles and tissues tear due to the repeated pounding of running. This is usually caused by inflexible calf muscles in the back of the lower-leg, improper shoe choice, shoes that are not providing enough cushion, or ramping distance too quickly. (For more on shin splints, click here.) A stress fracture is a very small crack or group of cracks that forms in the bone itself, like a crack in a window.

The major difference in differentiating between a shin splint and a stress fracture is usually what we call “point tenderness”. With a shin splint, if you run your fingers along the shin, it will usually hurt all along the bone as you pass your fingers down the leg. With a stress fracture, there is usually one specific spot (or multiple spots) that hurts really badly. These spots are usually about the size of dime. As you go along pushing with your fingers, you’ll find a specific spot that you say “ooowwweee” when you touch it. The rest of the area will be much less tender.

Another test for a stress fracture is called a “hop test”. Here you stand on one foot (the one that has the hurt leg) and hop. Generally if you can hop on it, it is probably not a stress fracture. Your mind will essentially prevent you from hopping on it if it is a stress fracture, because you know how much it is going to hurt. This isn’t really a very scientific test, but it does seem to work with some people.

Stress fractures are much less common than shin splints. In most cases, a shin splint is a more likely explanation for shin pain, especially in new runners.

A bit of bad news in diagnosing stress fractures, because they are very small cracks they may not show up on an x-ray. A bone scan or MRI are often the only way to actually see them. This often leaves a definitive diagnoses up to the doctor’s judgement, rather than hard and fast pictures. This may be a reason to see a Sports Medicine Doctor, because they may see more of these types of injuries than a generalist.

With that said, if you have a stress fracture, you will need to stop running until it heals. No ifs and or butts about it. The best way to explain this is that is to imagine your bone like a pane of glass. Now imagine tapping on it lightly with a hammer. Eventually there will be a small crack or a series of cracks that develops right where you are tapping on it. At this point, your stress fracture has appeared. If you keep tapping on it, what is going to happen? Eventually the pane of glass is going to shatter. So when that stress fracture appears, you either stop tapping on it and let it heal or if you keep on tapping (running) then the bone itself is going to break and you’ll have a real fracture to deal with — which is a far more serious problem.

If you do have a stress fracture, then the best method to keep training is aqua jogging or aqua running. This means running in a swimming pool, usually wearing a flotation belt. It isn’t a lot of fun or very interesting (imagine swimming laps by in the jogging position and going much more slowly than a swimmer). But it is very effective at keeping up your cardio and maintaining running muscles in the legs, with zero impact on the lower-leg. Swimming is also a great way to keep up fitness, because again it is non-impact on the lower-legs.

So if you find yourself in this situation, first get things checked out by a doctor and see what she says. If she does diagnose with a stress fracture, then you’ll need to come up with a non-running training plan while you are recovering. If this is a shin splint, then you’ll likely need some time off and probably stretching, new shoes maybe and ultra-sound therapy — but you should be back to it in a fairly short order.

Coach Joe English, Portland, Oregon, USA
Running Advice and News
www.running-advice.com

share save 120 16 Training    Shin Splint or Stress Fracture?

4 responses so far, want to say something?

  1. 1. James Kahler November 30th, 2010 at 10:46 pm

    Several years ago I found myself asking myself the same question. “hmmm, shin splints or stress fracture?” This was in late winter after having completed my first marathon, not having taken much recovery time and then proceeding to jump right into another round of hard training to be able to set a PR in the spring. I was totally gung ho, adding (and loving) speed work for the first time, etc. etc. Well before I knew it, my left shin was really getting bad. I ran through all of the tests you mention (stretching, finger pressure, hop test, etc.) and signs were pointing to a stress fracture or bone strain (prelude to a stress fracture). I went to the orthopedist and he concluded the same. We did an X-ray, which didn’t show anything (as you explained and as we both had expected) and he suggested an MRI.

    At this point I asked a series of questions. I asked, “Dr, if we do this expensive test and find I have a bone strain, what is the prescription? Stress fracture . . . what is the prescription?” In each case he said the only prescription was rest and to only do non-impact cardio, such as swimming or biking. I asked, “Ok, so in each case when will we know it’s ok to run again?” He said, “You stay off it until it doesn’t hurt to run and they you ease back in, being especially careful when you add in any intensity to your training.”

    I said, “Hmm, sounds like either way, you are telling me to rest my leg until it doesn’t hurt anymore . . . then re-build slowly.”

    He said, “Yes”.

    I said, “Thanks. I don’t think I’ll need the MRI.”

    Of course, I’m not suggesting not to see a doctor. Far from it, but I do recall it was interesting that the only way to diagnose the stress fracture was to perform an MRI, but that the MRI itself (at least in my case) would have no bearing on the treatment that would be called for.

  2. 2. Chadwick Greenhalgh December 1st, 2010 at 4:24 pm

    I agree. Go see a doc. Mine was smart enough to look into *why* I was getting stress fractures because my training wasn’t that extreme. He found out that I had a serious vitamin D deficiency and that was preventing calcium from making my bones strong. Since upping my vitamin D, no more stress fractures.

    I have also suffered from shin splints. But I can usually get them to go away by rolling my calves on a foam roller. My foam roller is my new best friend.

  3. 3. chris April 8th, 2011 at 7:26 am

    thanks for this information. i’ve been searching for days for something i could understand and more importantly take to my doctor and say this is what the pain feels like. if it were my pain i could explain it no problem but it’s my daughter who is 15 and by the way, NOT a runner that is experiencing shin pain in her right leg. i have voiced my concern that i believe it is a stress fracture because the pain it is point specific but i was given the over anxious mother bit and sent home from emergency. now i am going to ask our family doctor to send her for a bone scan which i understand is particularly effective in diagnosing stress fractures. thank you again for this article. chris

  4. 4. Barry May 29th, 2011 at 4:27 am

    This is the first piece of advice I really like. Shin splint…….take time off, run when it feels better. Stress fracture…….take time off and run when it feels better. Granted the recovery times for both of these problems are completely different but I think they both make the statement. Listen to your body. If it hurts take a low impact approach. Super frustrating yes but the alternative is much worse.

Leave a Reply

You must be logged in to post a comment.