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For the foot during standing, think canoe and outrigger

Discussion in 'Biomechanics, Sports and Foot orthoses' started by scotfoot, Oct 1, 2023.

  1. scotfoot

    scotfoot Well-Known Member


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    I have said elsewhere that the long and short toe flexors help spread the load across the foot but, on reflection, and considering one very happy, pain free, dental nurse who had painful feet but took to strengthening her toe flexors , I don't think the benefits of more active toe flexor muscles are about spreading the load whilst standing all day but more about moving the COP back towards the heel giving a stacking of the joints at the ankle and more proximally. The shift of COP towards the heel will reduce stress and strain in the midfoot and so reduce pain from tired feet.

    Personally, I find the if I stand on one leg and press my toes down then COG shift towards the heel . And it takes very little effort to keep it there.

    Think of a canoe with and outrigger. A small amount of buoyancy ( force) at a distance from the main body of the canoe can make things more stable. Similarly, a small amount of force under the toes allow us to balance easily on the heel.
     
  2. scotfoot

    scotfoot Well-Known Member

    I find that if I stand on one leg and press my toes down then COG shifts towards the heel . And it takes very little effort to keep it there. Think of a canoe with and outrigger. Small force ,big difference.

    A small amount of buoyancy ( force) at a distance from the main body of the canoe can make things more stable. Similarly, a small amount of force under the toes allow us to balance easily on the heel.

    The implications for industry are huge. People in pain caused by work related standing take days off and are going to be less productive when they are at work. Much better for workers and company to have pain free feet if possible.



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  3. scotfoot

    scotfoot Well-Known Member

    Here is a link to a paper demonstrating that stimulation of the adductor hallucis moves COP posteriorly and laterally even with a knee fixed in the transverse plane.


    Intrinsic foot muscles have the capacity to control deformation of the longitudinal arch

    Luke A. Kelly,
    Andrew G. Cresswell
    ,
    Sebastien Racinais
    ,
    Rodney Whiteley
    and
    Glen Lichtwark
    Published:06 April 2014https://doi.org/10.1098/rsif.2013.1188


    "Stimulation of AH shifted the COP posteriorly and laterally for both 50% and 100% loading conditions (both p ≤ 0.05), whereas stimulation of FDB and QP produced a significant posterior shift in the location of the COP for both loading conditions (both p ≤ 0.05, figure 8)."
     
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