which suggests caution when

Labi1994

To be honest, I’m also quite skeptical that midfoot or forefoot striking in a 12mm lift shoe is a good thing. To accomplish a forefoot strike in a shoe with a big heel lift requires quite a bit of plantarflexion upon ground contact to clear the heel. Since evidence Nike Air Max 720 Damseems to be a popular word in this discussion, what evidence is there that this is safe? Shouldn’t the burden of proof be on the company making the product to show that it’s safe for the consumer? Isn’t this what drug companies have to do?“Sorry Zero Drop.. you are misleading your bloggers.. you state “Most  conventional running shoes have an average drop of 12 mm, which places too much impact and stress on the heel region”. Nonsense.. show me the proof.. published in a peer reviewed scientific journal.”As I have written previously here on Runblogger, forefoot striking has been shown to reduce vertical impact peak (many studies, Squadrone and Gallozi, 2009 and Lieberman et al., 2010 are recent examples) and vertical impact loading rate (Oakley and Pratt, 1988; Williams et al., 2000) relative to heel striking.Nike Air VaporMax Womens  Data showing no difference between forefoot and rearfoot impact loading rate is out there (e.g., Laughton et al., 2003), but data are limited that involve people well acclimated to multiple landing types. Data on loading rates are Nike Air Max 2017 Mens sometimes difficult to interpret if runners are not acclimated to a barefoot running style – for example, De Wit et al., 2000 showed dramatically increased vertical loading rate in barefoot runners compared to shod runners, but their barefoot runners were heel striking.  One would fully expect a barefoot heel strike to exhibit a higher loading rate since little cushion other than the heel fat pad is present to slow down force Adidas Hamburg Dames application. Lieberman et al., 2010 showed that habitually barefoot runners overwhelmingly land on the forefoot, which suggests caution when interpreting studies of barefoot heel Nike Air Max 2017 Dames strikers (who were probably unaccustomed to running barefoot). See this recent (2011) paper by Jenkins and Cauthon in the Journal of the American Podiatric Medical Association for more on this issue.Why does any of this matter? Higher vertical impact loading rates (how fast impact is applied to the body – think punching a wall with your bare fist vs. a boxing glove) have been linked to injuries like lower extremity stress fractures (see this review paper by Zadpoor and Nikooyan, 2011). Conversely, Nigg, 1997 reports results of what appears to be an unpublished graduate thesis suggesting that impact force and loading rate are not linked to injury, and that increased loading rate was actually associated with fewer injuries. However, this analysis looked at short term injuries and did not look at injuries by specific type.“You further state “The runner’s cushioned heel strikes the ground  first instead of the shoe landing on the more biomechanically efficient midfoot or forefoot”.. again.. show me the evidence.. let me save you time.. you will not find it because it does not exist. “Excessive heel-striking marks an open-invitation for potential foot and leg injuries. But minimalist and barefoot running shoes have a much less drop. Which means you are now landing on the midfoot or forefoot– the way nature originally intended us to run.”.. balony.. absolutely zero evidence of a connection between heel striking and injury.. and there is no evidence whatsoever that “nature” intended us to run on the forefoot.”Bartold goes on to cite a reference by researchers from the University of Massachusetts that reports “a 7% decrease in running efficiency in the barefoot group in a model predicting barefoot vs shod running.” I’m not sure exactly which paper he is referring to, but Nike Air Max 90 Womens if it’s the one I think it is, it’s a conference abstract in which a computer model was developed based on measurements from a single individual. No oxygen consumption measures from living human beings were involved. So, the two-dimensional computer model based on one person referred to in an unpublished conference abstract ran better on its heels…not sure I consider that to be strong evidence. Jenkins and Cauthon (2011) summarize a number of studies which have shown reduced oxygen consumption in barefoot running compared to shod running. However, to be fair, it’s quite possible that this is simply a mass effect since removing shoes removes weight from the end of the limb.