Flip flops

Flip-flop mechanics are different…

Wearing flip-flops, or open back footwear, changes how we walk. There is increased long flexor tone, often an increased ankle dorsiflexion angle during swing phase, often times increased knee flexion among many other things. The biggest problem is the loss of ankle rocker…

Want to know more? Join us on our monthly “third Wednesdays“ online seminar: biomechanics 329 on onlineCE.com, Tomorrow, September 16 at six mountain time

#flipflops #openbackfootwear #anklerocker #flexortone #gait #gaitanalysis ##thegaitguys 

Appropriate Placement of Metatarsal Pads

In a follow-up to our last IGTV video, here we look at appropriate place in metatarsal pads. Metatarsal pads can do a great job to lift and separate the individual metatarsal heads and create space for things like neuromas and alter the forefoot mechanics. They are not a substitute for appropriate exercise and strengthening.

This individual had right “sixth toe“ disease and the metatarsal pad was being used by a podiatrist to alter for foot mechanics. It was clearly too far back on the right side. 

“If you like this kind of stuff come join us on our website www.thegaitguys.com

And get even more exclusive content over on Patreon (www.patreon.com/thegaitguys)

But, if you really want to deepen your education come join us as we take this kind of material and  deeply dissect it in our MasterClass in a monthly basis over on Vimeo. 

(Vimeo.com/ondemand/thegaitmasterclass)

*join the Patreon $40 level and get the monthly masterclass and top level Patreon videos all included (it’s a far better deal than buying on Vimeo) 

6th Toe Disease

It’s probably fair to say that a good number of us see people with “sixth toe” problems or a Taylor’s bunion more often than not. This problem is often accompanied by internal tibial torsion and sometimes femoral retro torsion. This video reviews a case that came in yesterday.

If you like this kind of stuff come join us on our website www.thegaitguys.com

And get even more exclusive content over on Patreon (www.patreon.com/thegaitguys)

But, if you really want to deepen your education come join us as we take this kind of material and  deeply dissect it in our MasterClass in a monthly basis over on Vimeo. 

(Vimeo.com/ondemand/thegaitmasterclass)

*join the Patreon $40 level and get the monthly masterclass and top level Patreon videos all included (it’s a far better deal than buying on Vimeo) 

#6thtoe #6thtoedisease #tailorsbunion #lateralfootpain #footpain #footproblem #gait

What's wrong with the big toe on the right?

IMG_8039.jpg

So this is what happens when you don’t wear the right shoes as a kid…

This woman came into the office with lower back pain. Do you notice anything peculiar about her feet?

She said that when she was young she was told by the doctor she was “dink toed” and given special shoes (on a sidenote, she has bilateral external tibial torsion and no evidence of forefoot adductus) . The shoes evidently (according to the doctor) were too tight and caused the deformity that you see here. She stated that the shoes were extremely painful while wearing them and then for quite a while when she stopped. This is always been her “problem foot“ with limited toe dorsiflexion and ankle dorsiflexion on that side.

Notice how the distal phalanx of the Halex is stunted and it’s with is increased. Dorsiflexion at the MTP is limited with respect to the other side and dorsiflexion flexion at the IP is limited as well. It appears that the growth plate was damaged resulting in a hypo plastic digit which, due to insufficient length, transfers a lot of weight during terminal stance and preceding ( at the end of her gait cycle, preparing for propulsion) to the second metatarsal head where she gets moderate discomfort.

IMG_8040.jpg



We can increase the motion of the first ray with mobilization and exercise but unfortunately we are not able to lengthen her digit.

Growth plates are fragile things and what we do to children early on can have a profound impact upon their adult life.
footproblem #toeproblem #hallux #halluxdeformity #bigtoe #gait #gaitanalysis #footexam

Dual tasking and neurocognitive decline.

Your holiday homework . . . . look for the gait clues Ivo and Shawn have talked about this year (*see below)

Dual tasking and neurocognitive decline.
Mild cognitive impairment (MCI) is considered a predementia state associated with a 10-fold increased risk of progression to dementia. Dual tasking during gait may help predict neurocognitive decline.

So, When you are around aging family this holiday season, pay close attention to them when moving about around them. Dual tasking during gait should not be difficult for most healthy folks, but if you add in things that the aging population are challenged with (things like physical weaknesses, mild vestibular challenges, visual challenges , mild neuropathy, cold feet, proprioceptive losses) and then throw in some dual tasking (talking, carrying bags) we can often bring out predictors of future decline.
Remember, falls in the elderly are huge predictors of near term morbidity.

* Look for the clues during dual tasking or during intimidating situations (ie, crossing a busy street), look for things like slowing of gait, wider or narrower step width, shorter steps, frustration, confusion, reaching for support (grapping your hand or arm), stopping, shuffling, arresting of talk to negotiate an area, etc.

"A dual-task gait test evaluating the cognitive-motor interface may predict dementia progression in older adults with MCI (mild cognitive impairment)."

Association of Dual-Task Gait With Incident Dementia in Mild Cognitive Impairment
Results From the Gait and Brain Study. Manuel M. Montero-Odasso et al.
JAMA Neurol. 2017 Jul; 74(7): 857–865.

Forefoot running, achilles loads & gait retraining

tag/key words: gait, gaitproblems, gaitanalysis, forefootrunning, forefootstrike, achilles, heelstrike, elastography, thegaitguys, microvascularity, rockeredshoes, HOKA, metarocker, gaitretraining,

Links to find the podcast:
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Our website is all you need to remember. Everything you want, need and wish for is right there on the site.
Interested in our stuff ? Want to buy some of our lectures or our National Shoe Fit program? Click here (thegaitguys.com or thegaitguys.tumblr.com) and you will come to our websites. In the tabs, you will find tabs for STORE, SEMINARS, BOOK etc. We also lecture every 3rd Wednesday of the month on onlineCE.com. We have an extensive catalogued library of our courses there, you can take them any time for a nominal fee (~$20).

Our podcast is on iTunes and just about every other podcast harbor site, just google "the gait guys podcast", you will find us.

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Permalink URL: http://thegaitguys.libsyn.com/forefoot-running-achilles-loads-gait-retraining

Libsyn Directory URL: http://directory.libsyn.com/episode/index/id/9555122

Show notes:

Ultrasound elastographic assessment of plantar fascia in runners using rearfoot strike and forefoot strike. Tony Lin-WeiChen et al
https://www.sciencedirect.com/science/article/pii/S0021929019302775
J Sci Med Sport. 2015 Mar;18(2):133-8. doi: 10.1016/j.jsams.2014.02.008. Epub 2014 Feb 14.

Rocker shoes reduce Achilles tendon load in running and walking in patients with chronic Achilles tendinopathy.. Sobhani S et al
https://www.ncbi.nlm.nih.gov/pubmed/24636129/


The increase in muscle force after 4 weeks of strength training is mediated by adaptations in motor unit recruitment and rate coding. Alessandro Del Vecchio et al
https://physoc.onlinelibrary.wiley.com/doi/10.1113/JP277250


Learning new gait patterns is enhanced by specificity of training rather than progression of task difficulty. ChandramouliKrishnan et al
https://www.sciencedirect.com/science/article/pii/S0021929019301927


The microvascular volume of the Achilles tendon is increased in patients with tendinopathy at rest and after a 1-hour treadmill run. Pingel J et al
Am J Sports Med. 2013 Oct;41(10):2400-8. doi: 10.1177/0363546513498988. Epub 2013 Aug 12.
https://www.ncbi.nlm.nih.gov/pubmed/23940204/

*** Our PODcast disclaimer:
This podcast is for general informational purposes only. It does not constitute the practice of medicine, nursing, rehab, treatment, therapy recommendations or anything of the sort. This podcast should not replace proper medical advise that should only be attained through proper medical channels that would entail a full medical and/or biomechanical physical examination and/or appropriate diagnostic testing. No doctor-patient relationship is formed by listening to this podcast or any information gleaned from our writings or social media work.
The use of this information and the materials linked to the podcast is taken at the users own risk. This podcast and the content shared is not intended to replace or be a substitute for appropriate professional medical advise diagnosis or treatment. Users should not disregard or delay obtaining medical advice for any condition they have and should seek the advice and assistance from their providers for any such conditions.

So forget repairing your ACL tear huh?

Soapbox rant today: So forget repairing your ACL tear huh?

Just give it some deep thought before you decide rehab is enough for you. Don't get fully sucked into the non-surgery hype, sometimes there is value and purpose. We are not necessarily saying that we are pro-ACL surgery, but it does have a place when we are talking about a major ligament with many functions beyond articular vector restraint.

*Here is where we see the present problem with the "newer" rehab-only hype for ACL tears . . . . the follow up time frames of the research pieces that suggest that ACLR is sufficient, in our opinion are not long enough into the future (years) to substantiate that secondary instability is not occurring or not a risk. In fact, there are enough articles to substantiate that secondary instability (often deeply rotational) will occur if no ACL repair occurs.

But, other bad things can happen if the joint is not cinched up tightly.
"Increases in TFI (time from injury) are associated with medial meniscal tears, including irreparable medial meniscal tears, medial femoral condyle chondral damage, and early medial tibiofemoral compartment degenerative changes at time of ACLR. These findings highlight the importance of establishing a timely diagnosis and implementing an appropriate treatment plan for patients with ACL injuries. This approach may prevent further instability episodes that place patients at risk of sustaining additional intra-articular injuries in the affected knee. "
*in this study 47.2% were classified as playing competitive or professional sports versus recreational sport

There have been some therapists in the field around the world that have been promoting that ACL surgeries ** are seemingly becoming more and more unnecessary. Their stance seems to be that with hardcore rehab that the knees do just as well, that performance is not lost. Sure, this is possible this or next season, but what about in 2 years? 5 years ? And what will the consequences be then? This article outlines some thoughts.
So, lets just all be careful of the strong points of view we put out there for the consumer. We get their point, but it is foolish to dismiss that the ligament doesn't have a function and is never necessary to replace/repair as this article (and many others report). SECONDARY instability is a real thing, rotational instability in non-ACL repaired** knees is a real thing. Attenuation of secondary joint restraints over time is a real thing, and the cost that comes with those changes. The consequences to the joint structure as secondary instability sneaks in, are a real thing, they are most likely to occur, even if you rehab your client's knee deeply. So be sure that you educate your client, that without their ACL their knee will never be as good, even if you are a champion rehab guru, you are just not that good that you and your rehab can negate all of the rotational vectors of loading in your high level athletes. Time and load will win, just be honest. Just because you do not see consequences tomorrow, just because your top-tier athlete continues to perform this season at top levels without compliant, doesn't mean they will not be present next year. Just be up front with your clients.
And here is another thought to chew on. 24 months ago my Jui-jitsu master Prof Carlos Lemos Jr. tore his ACL. We rehabed and he did well, he even won his 4th world championship without his ACL. But, we had these talks, and he knew that even though he was able to perform at the top level, he knew that the leg was not like the other. He decided 6 weeks ago to have it repaired because we discussed many times the above kinds of long term possibilities. I placed what facts and experiences I have had over 20+ years, the research that is presently out there, and let him decide. He decided that "hope" only goes so far, that he knows he will not be exceptionally as strong on the long term rehab to the degree it was initially performed, and he did not want to risk subsequent internal joint damage that might ensue.
Yes, not everyone needs ACL surgery, especially those who are not highly active or sporting, or the aging/elderly, but we can make a case that just rehabing and dismissing repair is also going to miss some vital points. We are not saying that we are pro-ACL surgery, but it does have a place.
Just educate your client honestly, then let them decide the direction, and do good work.

If anyone wishes to debate here, lets do it. But come at us with 5-10 year post-rehab no-ACL surgery cases with MRI's showing no intra-articular cost. (Good luck with that.) But if you find such unicorns, we definitely want to see them so we can share it and adjust our stance more softly. We want to be as smart and accurate on our rants as possible, it is important.

**corrected/ammended 10:57central time

photo credit: pixabay.com. thank you !

Orthop J Sports Med. 2018 Dec 11;6(12):2325967118813917.
Relationship Between Time to ACL Reconstruction and Presence of Adverse Changes in the Knee at the Time of Reconstruction.
Sommerfeldt M1,2, Goodine T2, Raheem A3, Whittaker J1,4, Otto D

The loads are going to go somewhere.

You cannot change one thing, and not expect the other parts to change, have to adapt, and possibly complain at some point.
The loads are going to go somewhere.

Too much pronation means the arch may be reduced in height, but it also means that the first ray complex (the 1-2 metatarsals essentially) is dorsiflexing more than normal. This means they will not likely get to their adequate plantarflexion by the time the foot is ready to heel rise and toe off at supination. In other words, if you have pronated and dorsiflexed too long and too much, you will eat up the time you needed to plantarlfex and supinate.
This means that "Increased foot pronation may compromise ankle plantarflexion moment during the stance phase of gait, which may overload knee and hip."-Resende et al

If you cannot plantarflex the foot-ankle complex sufficiently, or in a timely manner, you should understand that you are carrying this fault forward while moving into heel rise during the forefoot rocker stance phase of gait, and you are doing it over a less stable, less rigid foot-ankle complex because it is still in relative pronation. This means you are placing higher propulsive loads over an unprepared ankle-foot complex. This means different/altered posterior compartment function, which can mean altered knee and hip function. Sagittal plane function, to name the most obvious, will have to create and endure compensatory loads. Sure, they may be fine for a time, but perhaps there will be a cost over time. Now, many might say, "if it is not a problem now, it is not a problem", let them build robustness on their chosen pattern; that can be very hopeful and shortsighted thinking in our opinion. Why not change things that are obviously aberrant and build robustness on a pattern and correction that is suspected to be more sound? This can be a cyclical argument that no one wins, EVER, we all see it all the time. After all, the arguments become silly after time, and we resist our own silly comments like "well, why change the oil in your car right now, nothing bad is happening at this time. Or, well that front right tire, though bald and nearly flat, is still rolling along so why bother changing it out?" But that stuff gets no one anywhere, other than pissed off, so we hold back. The debate never gets furthered along, because no one can see the future.

So, we will leave this rant with this thought, we cannot change one thing, and not expect the other parts to change, have to adapt. And adaptation can be both good OR bad. Or maybe we should say, good AND bad.
The loads are going to go somewhere. Lets leave it at that.

photo: credit pixabay.com

Gait Posture. 2018 Oct 23;68:130-135. doi: 10.1016/j.gaitpost.2018.10.025. [Epub ahead of print]
Effects of foot pronation on the lower limb sagittal plane biomechanics during gait.
Resende RA1, Pinheiro LSP2, Ocarino JM3.

Toe off: medial or lateral ? The hip matters, and do does forefoot loading.

Toe off.
How we off load can affect the tragectory of the knee sagittal hinging and it can affect the frontal, sagittal and rotational planes at the hip.

We can see here that a nice high gear medial foot toe off will draw the knee in a more sagittal direction (knee over foot, hip over knee) where as a lateral foot toe off, low gear off the lateral metatarsals could easily encourage the knee into the frontal plane, and the hip into the frontal and lateral rotational planes (knee outside the foot, hip outside the knee).

Lack of strength or awareness or endurance on a long run to endure the "more normal" medial toe off could lead to some knee tracking challenges and pathomechanical set up at the knee and hip, or elsewhere for that matter.
It is the clinicians job to find out if this is a factor, whether it is anatomic (torsion of long bones), weakness, lake of proprio/awareness or a combination of them.
Sometimes the smallest of details in how your client moves can get you the answers you need as to why your client may be in pain.

Screen Shot 2019-01-13 at 8.06.45 PM.png

Increased unilateral foot pronation and its effects upward into the chain.

Increased unilateral foot pronation affects lower limbs and pelvic biomechanics during walking. Nothing earth shaking here, we should all know this as fact. When a foot pronates more excessively, the arch can flatten more, and this can accentuate a leg length differential between the 2 legs. But it is important to note that when pronation is more excessive, it usually carries with it more splay of the medial tripod as the talus also excessively plantarflexes, adducts and medially rotates. This action carries with it a plantar-ward drive of the navicular, medial cuneiforms and medial metatarsals (translation, flattening of the longitudinal arch). These actions force the distal tibia to follow that medially spinning and adducting talus and thus forces the hip to accommodate to these movements. And, where the hip goes, the pelvis must follow . . . . and so much adaptive compensations.
So could a person say that sometimes a temporary therapeutic orthotic might only be warranted on just one foot ? Yes, of course, one could easily reason that out.
-Shawn Allen, one of The Gait Guys

#gait, #gaitanalysis, #gaitproblems, #thegaitguys, #LLD, #leglength, #pronation, #archcollapse, #orthotics, #gaitcompensations, #hippain, #hipbiomechanics

Gait Posture. 2015 Feb;41(2):395-401. doi: 10.1016/j.gaitpost.2014.10.025. Epub 2014 Nov 3.
Increased unilateral foot pronation affects lower limbs and pelvic biomechanics during walking.
Resende RA1, Deluzio KJ2, Kirkwood RN3, Hassan EA4, Fonseca ST5.

Two out of Three ain't Bad...But sometimes it is

image credit: https://commons.wikimedia.org/wiki/File:Meatloaf_(1).jpg

image credit: https://commons.wikimedia.org/wiki/File:Meatloaf_(1).jpg

“What do you mean my plantar fasciitis is due to my hip?”

I recently saw a 60 YO male patient with right-sided plantar fasciitis of approximately 1-1/2 months duration. It began insidiously with pain located at the medial calcaneal facet on the right hand side. He had localized tenderness in this area with some spread distally towards the metatarsal heads. He has ankle dorsiflexion was relatively symmetrical with mild impairment on the right compared to left but only approximately 2 degrees. He had hip extension is 0 degrees on the affected side and 10 degrees on the affected side. Sacroiliac pathomechanics were present as well with the loss of flexion and extension. He had a slight leg length discrepancy, short on the symptomatic side.

So what is going on?

Moving forward in the sagittal plane requires a few things:

Adequate hip extension

Adequate ankle dorsiflexion

Adequate hallux dorsiflexion with an intact Windlass mechanism

He has a diminished step length going from right to left. Because of the lack of hip extension, the motion needs to occur somewhere. His ankle dorsiflexion is almost sufficient but less sufficient on the right (symptomatic) side than it is on the left. He has adequate hallux dorsiflexion but lacks adequate hip extension. Like the song goes, begin "Two of of three ain’t bad". However in this case, it is bad. He has an intact windlass mechanism. In fact, a little too intact. This is causing a tug at the medial calcaneal facet, creating an insertional tendinitis that we know as "plantar fasciitis".

So we did we do?

  • Manipulated the right sacroiliac joint

  • Gave him lift she/spread/reach exercises

  • Gave him shuffle walk exercises

  • Worked on hip flexor lengthening

  • Treated the plantar fascial insertion locally with acupuncture and laser therapy

Dr Ivo Waerlop, one of The Gait Guys

#gait, #gaitanalysis,#thegaitguys, #anklerocker#halluxdorsiflexion, #plantarfascitis

Inverted ? Cross over gait? How we do all things ?

How we do one thing, is how we do all things.

Screen Shot 2017-10-19 at 12.45.46 PM.png

I was sitting having my morning coffee earlier than normal this morning, which left me time to ponder some things.
Look at this picture, is this not a magnification of the "cross over gait" x100 ? Thus, is that planted foot not inverted ? Yes, it has to be, to a degree, a high degree. There is a reason why soccer players have a great affinity for ankle sprains.
When we have a narrow based gait, we are most likely going to strike more laterally on the foot, more supinated, if you will. If you widen step width, less inversion, less lateral forces (typically) and less supination (typically) compared to a narrow based gait. 
If we descend stairs with our feet in a more narrow based gait, we are not only going to be inverted more, but striking at the ball of the foot, thus, more on the lateral foot tripod. This is the typical inversion sprain injury position. 
When we jump, we should be trying to land with our feet more abducted, certainly not narrow based, because if we are too narrow we are at more risk for the same lateral forefoot landing and thus ankle inversion event. Just like descending stairs.

We see plenty of ankle inversion events. Why? 
Because most people do not have enough hip abduction or peroneal skill, strength, endurance and they are unaware of their weak gait patterns or their ankle spatial awareness. Many have lazy narrow based gaits and insufficient proprioceptive awareness. And, they carry these things over into running, walking, jump landing (ie. volleyball, basketball, etc), and descending stairs, just to name a few.

How we do one thing, is how we do all things (mostly).

-Dr. Allen

Addendum:

Rickie Lovell : As he struck the ball it would been everted. The momentum of the follow through will have off loaded the everted foot as the energy moves in a similar line to that of the ball. It is extremely rare for a footballer to get a sprain from this, I certainly didn't see over several years working in professional football. 
On a side note, find some footage of David Beckham taking free kicks - the mechanics are astounding!

The Gait Guys: possibly everted, but no guarantee.It still looks pretty inverted to me.But we see your point, and is a real good one, real good. Super good. We will check our the bender-man thanks for chiming in with such great insight !

The Gait Guys:  yes, the momentum of the leg kicking across the body would externally spin the stance leg. The picture is likely showing the offloading phase, not the loading. Bueno !

Threshold Foot Drop

Threshold foot drop.  
Do you see it in this gait? No. There is a clue though, the EHL on the right (extensor hallucis longus) does not seem to be all that hearty and robust during gait, the toe is not as extended/dorsiflexes as on the left foot. A Clue ? Yes. 
This client had true blatant foot drop, but it was caught relatively immediately, and the source resolved and recovery ensued. There is still some residual weakness, as you see at the end of the video,  but making steady gains. Previously, gait showed obvious foot drop, foot slap, abrupt knee flexion (the "catch" response as we call it as the client's knee suddenly flexed forward as foot slap occurs). But, as you can see , the gait is pretty much normal now except for a little EHL strength lag. But, at the end of the video, when they heel walk, one can see the weakness, they cannot keep the ball of the foot off the ground during attempted heel walk. We like to call this "threshold weakness", it is just hovering below the surface, when taxed, it can be seen, but doesn't show up in gait. But, it does show up in longer endurance based walking events. This may be when your client's symptoms show up, as fatigue expresses limitations in the system. It just goes to show you, if you are not testing and looking for these things, you just might not find the source of your clients knee pain, foot pain, hip or low back pain. Heel and toe walking takes 10 seconds, do not forget to check them off.  It just might be the "big reveal" for you, and them !

-Shawn and Ivo, the gait guys

Podcast 110: Step width, breasts, and diaphragm changes with movement.

We have a great show for you today. All of the above topics in the title, plus the immune system’s effect on fine tuning motor control as well as some long form dialogue on human base of support and stability during walking and running. All the links you need are below in the show notes. Thank you for spending some time with us in your ears.  :)

Show Sponsors:   Newbalancechicago.com   Altrarunning.com

A. Podcast links:

http://traffic.libsyn.com/thegaitguys/pod_110f.mp3

http://thegaitguys.libsyn.com/podcast-110-elite-runners-breasts-diaphragms-and-human-movement

B. iTunes link:
https://itunes.apple.com/us/podcast/the-gait-guys-podcast/id559864138

C. Gait Guys online /download store (National Shoe Fit Certification & more !)
http://store.payloadz.com/results/results.aspx?m=80204

D. other web based Gait Guys lectures:
Monthly lectures at : www.onlinece.com type in Dr. Waerlop or Dr. Allen, ”Biomechanics”

-Our Book: Pedographs and Gait Analysis and Clinical Case Studies
Electronic copies available here:

-Amazon/Kindle:
http://www.amazon.com/Pedographs-Gait-Analysis-Clinical-Studies-ebook/dp/B00AC18M3E

-Barnes and Noble / Nook Reader:
http://www.barnesandnoble.com/w/pedographs-and-gait-analysis-ivo-waerlop-and-shawn-allen/1112754833?ean=9781466953895

https://itunes.apple.com/us/book/pedographs-and-gait-analysis/id554516085?mt=11

-Hardcopy available from our publisher:
http://bookstore.trafford.com/Products/SKU-000155825/Pedographs-and-Gait-Analysis.aspx

________________________

Show Notes:

Flexible recording patch
http://www.cnet.com/news/flexible-patch-performs-like-a-wearable-tricorder/?ftag=COS-05-10aaa0b&linkId=24813511

How Neurons Lose Their Connections
http://neurosciencenews.com/genetics-neurons-cpg2-3441/

The immune system and fine tuning motor control and movement.
http://neurosciencenews.com/mghi-motor-control-genetics-4035/

Breast biomechanics
http://www.outsideonline.com/2065486/how-breasts-affect-your-performance

http://thegaitguys.tumblr.com/post/50570270440/human-gait-changes-following-mastectomy-taking

Elite runners
http://www.gaitposture.com/article/S0966-6362(16)00086-2/abstract?cc=y=

Diaphragm and Chronic Ankle Sprains
http://thegaitguys.tumblr.com/post/145209607699/the-diaphragm-and-chronic-ankle-instability