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Off-the-shelf in-shoe heel inserts – Does cost matter?
  1. Arun K Ramanathan (a.k.ramanathan{at}dundee.ac.uk)
  1. Institute of Motion Analysis & Research, University of Dundee, United Kingdom
    1. Manakalathil C John (drmcjohn{at}gmail.com)
    1. Institute of Motion Analysis & Research, University of Dundee, United Kingdom
      1. Graham P Arnold (g.p.arnold{at}dundee.ac.uk)
      1. Institute of Motion Analysis & Research, University of Dundee, United Kingdom
        1. Lynda A Cochrane (l.cochrane{at}dundee.ac.uk)
        1. Institute of Motion Analysis & Research, University of Dundee, United Kingdom
          1. Rami J Abboud (r.j.abboud{at}dundee.ac.uk)
          1. Institute of Motion Analysis & Research, University of Dundee, United Kingdom

            Abstract

            Objective: A growing exercise culture has lead to an increase in the use of off-the-shelf heel inserts. While there are a variety of designs in a spectrum of cost ranges, probably the ease of availability and cost would mainly determine the choice of purchase. This study was designed to determine whether expensive designs provide better pressure attenuation under the heel when compared with their less expensive counterparts. Participants and Design: Six brands of off-the-shelf heel inserts were tested. Selection of these was based purely on their availability in all sizes. Cost per pair ranged from £6 to £30. Thirty-five asymptomatic subjects walked on a 10 metre walkway, once with no inserts and once with each pair of inserts. The Pedar® in-shoe system recorded a range of parameters under the heel. Setting: Institute of Motion Analysis and Research, Ninewells Hospital, Dundee. Main outcome measures: Evaluation of plantar pressure parameters under the heel. Results: All inserts reduced peak pressure under the heel. Maximum force and pressure-time integral also decreased. Contact time generally increased with the use of inserts. Values of contact area with and without inserts were comparable. Conclusions: No significant differences were observed under the heel between the pressure attenuation properties of the lowest priced and the most expensive designs and hence the less expensive inserts can be considered as good as the expensive brands. However, the endurance power of these inserts may differ and this should be evaluated.

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