The Huffington Post has a bit of a reputation among real scientists for promoting quackery, or at least promoting “medicine” that is not backed up by science. See, e.g., The Huffington Post’s war on medical science is noticed, Why is there so much medical misinformation in The Huffington Post?, and A science section for the Huffington Post? More like a pseudoscience section! (2010 edition). Now they have an article on barefoot running from Dr. Robert Kornfield, an “alternative medicine” advocate: Barefoot Running Shoes: How Effective Are They?. Dr. Kornfield is a DPM (Doctor of Podiatric Medicine), and I’m afraid his article reads much the same as others we hear from a lot of other podiatrists who are unfamiliar with barefoot or minimalist running.
As far as he is concerned, barefoot running (or, in this case, running in minimalist shoes) is a fad.
Barefoot running shoes are designed to re-create a “natural,” barefoot running dynamic on “unnatural” surfaces like concrete, asphalt, red top, black top, etc. How can we have a barefoot running shoe? Doesn’t barefoot denote without shoes?
Choosing to run on non-yielding surfaces without the protection afforded by proper running shoes can be harmful to the foot and ankle and cause even more problems downstream from compensation patterns. So what really are these pedal marvels and why is everyone running to take their shoes off?
Hey, at least he recognizes that a “barefoot running shoe” is not “barefoot.” But he also starts off with misconception number 1, that there is something different about “unnatural” surfaces. He goes on to say
Barefoot running shoe manufacturers believe that the human foot, unimpeded by synthetic surfaces and restrictive running shoes, should function at its best. That is a correct assumption, save for the fact that the human foot was designed long before the paving of roads. In fact, uneven, grassy surfaces are the most natural surface for the human foot because it helps the body navigate and respond to uneven terrain, while at the same time absorbs shock, stabilizes weight and propels the body forward. In order for this to occur successfully, most of us are born with a flexible forefoot and a rigid or stable rearfoot. In other words, at heel strike — when your heel hits the ground — your leg from the hip down is aligned for optimal function and is stabilized during normal walking.
OK, stop right there. He somehow seems to think that the human foot evolved in some sort of grassy park. Has he never gone hiking? You know, out in nature? There are all sorts of surfaces, from mud to sand to grass to rocks to hard pan. Those latter two are not all that different than asphalt or concrete. They also tend to occur a lot in the parts of Africa we all came from.
And then he talks about heel strike. I guess he just hasn’t heard about the research from Dr. Lieberman at Harvard. Barefoot runners who have been doing it any length of time don’t heel strike. What he does is introduce some sort of false dichotomy about heel strike: that is has something to do with whether you run on a natural or unnatural surface:
The lack of heel strike on unnatural surfaces is not mimicking the way the foot would perform barefoot on natural surfaces. For this very reason, these shoes will eventually come up short, as the foot requires either cushioned heel strike on an unnatural surface or minimal heel strike on natural surfaces.
No. When you run barefooted you simply do not heel strike, regardless of the surface (and if you do heel strike, you are doing it wrong, keeping the lousy habits you picked up from wearing shoes, in which the elevated heel guarantees a heel strike).
He then tries to give us a demonstration of this at work, and tells us that this decreases the propulsion of the big toe:
Try this. Hold your first metatarsal and pull it up as hard as you can, then with your other hand try to pull your big toe upward toward your ankle. You will find the joint will jam up and feel restricted. Now, hold your first metatarsal and apply pressure down toward the floor, then with your other hand, pull your big toe up toward your ankle. You will find a dramatic increase in the upward range of motion of the big toe — this is normalized function.
Huh? Ok, you can test this. The first metatarsal is the long bone just behind the toe bones. It runs from around the ball of your foot back to near the ankle bone (and of course, you have one for each toe). The one he is talking about is for the big toe, which does most of the work, which means its the one at the highest part of your arch.
So, go ahead, do what he says. Just inside your arch, pull up as hard as you can, then see if you can pull you big toe up. It’s really hard, isn’t it. So he is right about that. And if you let go of that first metatarsal, it’s really easy.
But what does this have to do with hard surfaces versus soft surfaces? Absolutely nothing. You see, under your first metatarsal there is a tendon (the one for pulling your toe down and applying force when you are running). When you press the tendon against the metatarsal, that prevents it from moving (you can feel it trying to work as you hold it down). So of course that prevents the big toe from moving against it. Duh.
However, there is a situation in which pressure is regularly applied to the bottom of your arch there (and which would then lead to decreased propulsion). That’s right: when you are wearing a shoe with arch supports, which nearly all running shoes do. The embedded arch presses the tendon against the metatarsal, reducing its range of motion. I have rather flat feet, and back when I wore shoes, those embedded arches always gave me a lot of discomfort as they severely restricted decent (and natural) motion.
And then he finishes with our favorite shibboleth: that only “special” people with “special” feet can get away with running barefoot. Because everybody else evolved with the shoes they came out of the womb with. Right. Oh, and for all those non-special people?
you can safely wear conventional running shoes manufactured by companies who have spent years on research and technology with the addition of a proper running orthotic.
Yup. Prescribing more orthotics to try to fix the problems that the shoes themselves cause. I’ve said it before and I’ll say it again: these podiatrists have never seen feet that have not been damaged (and had that damage perpetuated) by shoes. They have no idea what a strong foot looks like, or what a strong foot can do.