Newton Shoes Study: More Efficient

Brian wrote:

I have no doubt that the best runners in the world are mid/forefoot striking supinators. . . .

Actually, the only study on the issue showed few forefoot strikers and

Yup. that's one shitty study.

No blinding of runners or study team, sample size of 9, and every graph comparing the lactate level and HR with each shoe type is basically superimposable, with no statistical testing to demonstrate that the miniscule changes are more than those expected with random variation. Total crap.

Just saying.

Go to Google Images and just do some searches for finish line photos of elite track meets where you have a panorama of several finishers abreast all at once and all you will see are forefoot supinators. You might say the forefoot part is because they are sprinting (believe it or not, us heel strikers don't necessarily get on our toes going as fast as we can) but the supinating part is obvious and is not caused by sprinting. A vast disproportion of elites are sumpinating fore/midfoot strikers compared to the average herd.

I can't figure out who else could run a 10k in spikes. My 10k PR is 31:15 and I could never even run a 800m in spikes.

good luck..... wrote:

Ur lower legs will be destroyed if you.plan on running 60+ mpw on them. Achilles, soleus, shin, everything...goodbye

this is entirely not true. last summer i put 70+ mile weeks in them and they were just fine. the only reason i bought them was because i was working at a running store at the time and got a good deal. however i would never buy them again simply because of the price. They were great for forefoot runners tho, they have big rubber nubs on the bottom forefoot that add a lot of cushion that other shoes lack.

as for them making people better at running and their other claims, i highly doubt that. They are just shoes for f***s sake.

Sorry about that screwed-up entry; computer issues.

Actually, the only study of elite road runners shows few forefoot strikers and 75% landing on their heels. The percentage of heel stikers drops a bit for those in the top.

http://www.sportsscientists.com/2008/04/running-technique-footstrike.html

Newton asserts (in an e-mail exchange) that those \"heel-strikers\" are actually midfoot strikers. It\'s hard to tell where someone actually hits based upon one photo, but most of the elite marathoners whose pictures I\'ve seen appear to be very close to heel-strikers, Kara notoriously so (and on the track for her as well).

I just did a google images search on the phrase "men's 1500m" and I can't find a single finish line picture that doesn't starkly show supinated footstrike. I might grant that the universal exaggeration of forefoot in these pics has to do with the speed, but I, for one, don't change my footstrike that much based on my speed. I think I am on my toes, say, doing 200's, but observers say, no, I just think i am.

If you look for similar photos from a men's 10,000, you can find a few more heel strikers, but still lots of forefoot/midfoot striking. Perhaps, as you say, it is an illusion, but my definition of heel striking is very easy to see.

I think such things are just luck of the draw. I sincerely doubt a shoe can encourage biomechanics that your body isn't quipped to do. I am going to be in Boulder later in the month and I am going to stop by Newton's store just to try some on out of curiousity. what they are selling for the price they are selling it at would lead one to believe that would need to accommodate the curious.

Some 10,000 finishers.

http://farm1.static.flickr.com/39/83163921_c60adbe3aa.jpg?v=0

http://www.juanjosemartinez.com.mx/Images/geb_sydney2000.jpg

Touche.

Still supinated though. Supinators are a vast minority among runners but seem to be the vast majority among elites or at least a much greater proportion.

Another elite pic that shows more heel striking:

http://www.zimbio.com/pictures/7f__RNsxxq0/Great+City+Games

I don't see a single pronator in that picture. Maybe the key is supinating is a more efficient running economy and that supinators are more likely to be forefoot strikers.

Brian, far out dude, are you really so naive about foot motion that you think a photo of mid air position with the foot in a relatively supine position means they are supinators??

I don't know if you are taking the piss out of us or not because you are so far off the mark it's hilarious.

Of course their feet are like that, because when they land, they land on the outside edge of the foot, and as their body weight comes down they PRONATE!!!!!!!!!!!

You are simply WRONG - almost EVERYBODY PRONATES. Some people over pronate, some rare people supinate on footstrike.

My interest in this came about because my photos show me as close to heel striking, but I don't think I am. You can see from that Manchester photo how varied people's (elite's) strides are. I tend to think one should leave well-enough (heel/mid/fore) alone, i.e., if you're not getting injured stick with what works. But there are those who think changing to forefoot strking is the way to go and that people should change to what Newton says is "optimal" form. I started this thread to get reaction to this Newton study.

Here's a blog post I did:

http://runwestchester.wordpress.com/2009/07/28/something-striking-about-footstriking/

The theory is that wearing shoes allows/enables runners to become heel strikers (bad) while barefoot running promotes natures intended, forefoot landing (good) while running. No doubt running barefoot almost gurantees forefoot strike, but does it help someone get faster?

http://www.youtube.com/watch?v=9itkEkcQ8WM&eurl=http%3A%2F%2Fwww%2Ebarefootted%2Ecom%2F&feature=player_embedded

http://barefootted.com/labels/barefoot%20running.html

It's hard to determine the biomechanics of a runner's gait looking at still images. Video would be more definitive. The type of foot strike is determined by the action of the foot through the gait cycle, not at initial impact.

FWIW, a majority of elites are NOT supinators. They are normal pronators, better known as neutral gait runners...initial impact on the lateral heel, slight pronation at midfoot stance to engage the plantar fascia and an even toe-off.

You got (at least) one serious flaw with that study : they have not compared the weight of the different personal shoes used as "control" vs. the Newton ones.

If the pretty light Newton Shoes are only 50grams ligher (that I suspect) than the average of the runners "personal" shoes that were used as controls, then this would be enough to give the reason for the better lactate results for the Newton Shoes. I've tested this myself and the difference is huge just from small weight differences in footwear.

Marius Bakken

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This should answer your questions. Though I find that, whenever I post this in a thread where some lunatic is ranting about how "all elites are forefoot-striking supinators," they simply ignore this very well-designed study. Probably because it completely refutes their argument.