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Are old running shoes detrimental to your feet? A pedobarographic study

Discussion in 'Biomechanics, Sports and Foot orthoses' started by gavw, Aug 26, 2011.

  1. gavw

    gavw Active Member


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    Background Footwear characteristics have been implicated in fatigue and foot pain. The
    recommended time for changing running shoes is every 500 miles. The aim of our study was to
    assess and compare plantar peak pressures and pressure time integrals in new and old running
    shoes.
    Findings This was a prospective study involving 11 healthy female volunteers with no previous
    foot and ankle problems. New running shoes were provided to the participants. Plantar pressures
    were measured using the Novel Pedar system while walking with new and participants’ personal
    old running shoes. Plantar pressures were measured in nine areas of the feet. Demographic data,
    age of old running shoes, Body Mass Index (BMI), peak pressures and pressure-time integral
    were acquired. The right and left feet were selected at random and assessed separately. Statistical
    analysis was done using the paired t test to compare measurements between old and new running
    shoes.
    The mean peak pressures were higher in new running shoes (330.5±79.6 kiloPascals kPa)
    when compared to used old running shoes (304±58.1 kPa) (p=0.01). The pressure-time integral
    was significantly higher in the new running shoes (110±28.3 kPa s) compared to used old
    running shoes (100.7±24.0 kPa s) (p=0.01).
    Conclusion Plantar pressure measurements in general were higher in new running shoes. This could
    be due to the lack of flexibility in new running shoes. The risk of injury to the foot and ankle
    would appear to be higher if running shoes are changed frequently. We recommend breaking into
    new running shoes slowly using them for mild physical activity.

    Full text: http://www.biomedcentral.com/1756-0500/4/307/abstract
     
  2. Griff

    Griff Moderator

    A study involving 11 females, with no clarification of individual activity levels/running mileage, analysis performed when only walking not running, and in no way investigating injury.

    You can't get from there to here:

     
  3. efuller

    efuller MVP

    When I read the first half of the abstract, I was sure that they were going to have the subjects back after a certain number of miles in their shoes. It sounds like they were comparing two different kinds of shoes.

    On the other hand, worn shoes will compress more in areas of high pressures. That might explain why newer shoes had higher pressures.

    Eric
     
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