No ……….. No they didn’t. But why didn’t they? Was it the runners (http://kehoephysio.me/2015/01/28/the-low-priced-runners-arrived/) or did I ever believe it was possible that they would be as “good” as my more expensive runners. I covered just under 300km in the cheaper runners – I gave them a chance! But I started getting bilateral achilles pain, particularly on the longer runs – greater than 20km. I have never had this problem. My legs were heavier and my times much slower (not that they were ever too quick).
So my legs felt heavier – but were they? Yes they were, by over 100 grams per shoe. Not much you think? YES it absolutely is!!! Studies have consistently shown that heavier shoes reduce running economy. Each 100g/3.5oz added to the weight of each shoe reduces running economy by about 1% (Fuller et al., 2014). The literature would suggest that my choice of runner has no influence on my injury (Lieberman et al., 2010; Goss & Gross, 2012). But lets consider the other most noticeable measurable effect was a slowing in my running, caused by the cheaper runners, this may have contributed to my achilles pain by inadvertently affecting my foot strike and reducing my cadence ( steps per minute) (Wellenkotter et al., 2014).
I will return to searching amazon and my other regular haunts looking for deals. The endless search for the best runner continues, I may never find it but I will enjoy the hunt and will continue to hide my new runners from my wife!
Fuller JT, Bellenger CR, Thewlis D, Tsiros MD & Buckley JD. (2014). The Effect of Footwear on Running Performance and Running Economy in Distance Runners. Sports Med.
Goss DL & Gross MT. (2012). Relationships among self-reported shoe type, footstrike pattern, and injury incidence. US Army Med Dep J, 25-30.
Lieberman DE, Venkadesan M, Werbel WA, Daoud AI, D’Andrea S, Davis IS, Mang’eni RO & Pitsiladis Y. (2010). Foot strike patterns and collision forces in habitually barefoot versus shod runners. Nature 463, 531-535.
Wellenkotter J, Kernozek TW, Meardon S & Suchomel T. (2014). The effects of running cadence manipulation on plantar loading in healthy runners. Int J Sports Med 35, 779-784.