Dorsiflexion. This important motion occurs at the ankle and is seen when the dorsal(top) aspect of the foot and the anterior(front) aspect of the tibia(shin) move closer together. This motion is seen with and is necessary for proper execution of many basic human movements including squatting, running, walking, jumping and more. This motion is a vital part of most functional movements and proper function up and down the entire kinetic chain. Even minor tasks such as sitting and standing from a chair or walking up and down stairs requires adequate dorsiflexion of the ankle.
There are many issues related to inadequate dorsiflexion including many lower extremity injuries and and foot deformities. Evidence exists that problems here can be related to falls in the elderly, patellar tendinopathy, ACL injuries, lower extremity kinematic changes, and patellofemoral pain syndrome to name a few. This motion could be limited by several different problems such as soft tissue mobility(muscles and fascia), bony abnormalities, joint capsule restrictions(belongs with soft tissue mobility), and impingement of these structures.
|The human foot and ankle are masterpieces of complexity and natural engineering.|
- The ankle plantar flexors(think calf muscles) and plantar fascia may be eccentrically (resistively stretched) loaded at initial foot strike depending on landing type (heel strike vs mid-forefoot landings).
- As the gait cycle changes from initial contact to mid-stance, the ankle moves into a more dorsiflexed position. At this moment, vertical ground reaction forces are at their highest(Active Peak on the graph below) and loading of the achilles tendon is reaching its maximum peak. To allow proper dispersal of these forces and to allow some of this energy to be stored and then reused the achilles must act as a spring. Dr. Mark Cuccuzzella has made a video that highlights these principles of running mechanics and he does a much better job of visually and audibly explaining it than I can in writing.
- Steve Magness, writer of the blog Science of Running, and Head Cross Country coach at the University of Houston wrote a great post on the most vital components of running here as well.
- The ankle plantar flexors are now on maximum stretch(maximum dorsiflexion) and are maximally loaded now must assist the posterior chain(gluteus muscles and hamstrings) to propel the body forward and slightly upward(propulsion phase & toe-off).
- Requires the ability to run(discussed previously)
- Requires the ability to jump
- You need to be able to shoot a jump-shot, lay-up, dunk or to go up for a rebound.
- Requires the ability to land after jumping
- You need to safely come down after jumping and be able to dissipate the forces from impacting the ground.
- The above can be summarized by the ability to squat. (*Only the squat applies to gardening, unless you are into some extreme gardening stuff that i’ve never heard of before.)
- You also need to be able to properly squat to get into sport-specific positions of basketball such as a defensive stance and you don’t want to bend at the waist to work in your garden(some people still will).
Looking at Mr. Shorts
- This first link is credited to Mike Reinold’s blog and is an all-encompassing post that is very concise and does a great job of saying everything that I am trying to say with this post. He even has many great videos for working on improving your own mobility.
- This link is to a blog post by Jay Dicharry, MPT, CSCS…Author of the book, Anatomy for Runners. Jay is probably one of the premier clinicians and researchers out there today when it comes to running mechanics, research and injuries. This post discusses more than just ankle dorsiflexion and is definitely recommended.
- This next link is actually to a video made by Jay Dicharry. This video will show you a quick and easy list of self-evaluation techniques and fixes for somebody looking to transition to minimal running shoes. However, I feel that these are vital to athletes and runners regardless if they are barefoot or wearing Hoka one-ones.
- How much dorsiflexion do you actually need? Jay Dicharry recommends at least 25 degrees of dorsiflexion at the ankle and 30 degrees of dorsiflexion of the big toe(measured at 5 degrees of ankle dorsiflexion). Mike Reinold and the minds of the Functional Movement System, such as Gray Cook sponsor the idea of the knee reaching about 5 inches past the toes while in a half kneeling stance. One study found that athletes with less than 36.5 degrees of dorsiflexion had an…”18.5 to 29.4% risk of developing patellar tendinopathy compared to a 1.8 to 2.1% risk for athletes with dorsiflexion greater than 36.5 degrees.” I believe most of these values to be too similar to chose one set of thought over the other and suggest them as mere guidelines and not cut points.
- I believe that a vast majority of us living in 1st world countries that grew up with or have been wearing shoes for decades with an elevated heel have limitations in ankle dorsiflexion. There are exceptions to this but I have provided you with information to check for yourself.
- I admit that going barefoot or utilizing a more minimal shoe during training may not be feasible for everyone. However, I do feel that incorporating and wearing a shoe with less heel-to-toe drop or less of an elevated heel during everyday activities such as at work, around the house or out on the town can be very beneficial for restoring proper ankle dorsiflexion. What you wear on your feet 90% of the time probably has a more profound effect on your tissues than the shoes you wear 5-10% of time you spend training each week.
- When it comes to increasing the actual mobility with manual work I believe a multi-faceted approach is best. A combination of joint mobilizations, static stretching(post exercise), foam rolling, etc is probably going to be more effective for you unless you or a manual therapist has determined that only one specific issue is limiting you. It would not be uncommon for several of these issues to be a limiting factor for a person.
- Do not ignore above and below, tibial internal & external rotation as well as plantar fascia mobility influence movement at the ankle as well.
- DO NOT try to treat the symptom by eliminating the need for proper dorsiflexion. Utilization of heel lifts, immobilization, restrictive tape jobs, new shoes and etc. are only treating your symptoms. These MAY be appropriate for short-term relief but they do NOT fix your problem. If you try to take the easy way out and try to eliminate this motion then you are setting yourself up for a different set of problems up and down your entire kinetic chain.
In conclusion, this is going to be an issue with a majority of people. This problem exists in both the physically active and inactive populations. Only the minority of people that I’ve tested have had adequate ankle dorsiflexion. I would love to see how this compares with a third world country where people have not had the “luxury” of wearing shoes with elevated heels since birth. I bet you can find plenty of pictures in a national geographic magazine where the indigenous tribespeople have perfect squat form and can hold it comfortably with ease.