What Your Shin Splints Are Telling You When You Run

What Your Shin Splints Are Telling You When You Run
How you land while you run makes a difference in shin health!

Noh et al. (2015) found that heel strike runners with shin splints had a reduction in ankle dorsiflexion, and more ankle plantar flexion upon landing, suggesting that the body reduces ankle dorsiflexion to stop the shin splints from getting worse.

In contrast, forefoot runners land with a plantar-flexed ankle which prevents weakness of the shin muscles by reducing muscle activity in the tibialis anterior.

Therefore, your shins are telling you to stop landing on your heels and instead use a forefoot strike by plantar-flexing your ankle at touchdown.

Need more details on what a forefoot strike looks like? Check this article.

The Real Cause of Shin Splints: Lengthened Ankle Dorsiflexion Time

A lengthened ankle dorsiflexion time at touchdown is a major cause of shin splints in runners, particularly heel strike runners.

More fundamentally, lengthened ankle dorsiflexion time increases the duration of eccentric contractions and muscle activity of the shin muscles.

The emerging consensus is that the longer the shin muscles contract at each step during running, the faster they fatigue, suggesting that switching to a more plantar-flexed ankle at touchdown seems like the next logical route to prevent early shin fatigue and therefore shin splints.

Moreover, adopting a plantar-flexed ankle at touchdown offers enormous benefits, aside from preventing shin splints, it improves ankle plantar flexor strength, allowing for better stability during the support phase, but it also facilitates a forefoot strike at touchdown (Gehlsen & Seger,1980).

Learn more about the health benefits of forefoot running here.

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Gehlsen, G. M., & Seger, A. (1980). Selected measures of angular displacement, strength, and flexibility in subjects with and without shin splints. Research Quarterly for Exercise and Sport,
51, 478 – 485.

Noh et al. Structural deformation of longitudinal arches during running in soccer players with medial tibial stress syndrome. Euro J Sport Sci, 2015;15(2):173-18.

Bretta Riches

"I believe the forefoot strike is the engine of endurance running..."

BSc Neurobiology; MSc Biomechanics candidate, ultra minimalist runner & founder of RunForefoot. I was a heel striker, always injured. I was inspired by the great Tirunesh Dibaba to try forefoot running. Now, I'm injury free. This is why I launched Run Forefoot, to advocate the health & performance benefits of forefoot running and to raise awareness on the dangers of heel striking, because the world needs to know.
Bretta Riches

P.S. Don't forget to check out the Run Forefoot Facebook Page, it's a terrific place to ask questions about forefoot running, barefoot running and injury. I'm always happy to help!

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