Welcome to the Podiatry Arena forums

You are currently viewing our podiatry forum as a guest which gives you limited access to view all podiatry discussions and access our other features. By joining our free global community of Podiatrists and other interested foot health care professionals you will have access to post podiatry topics (answer and ask questions), communicate privately with other members, upload content, view attachments, receive a weekly email update of new discussions, access other special features. Registered users do not get displayed the advertisements in posted messages. Registration is fast, simple and absolutely free so please, join our global Podiatry community today!

  1. Everything that you are ever going to want to know about running shoes: Running Shoes Boot Camp Online, for taking it to the next level? See here for more.
    Dismiss Notice
  2. Have you considered the Critical Thinking and Skeptical Boot Camp, for taking it to the next level? See here for more.
    Dismiss Notice
  3. Have you considered the Clinical Biomechanics Boot Camp Online, for taking it to the next level? See here for more.
    Dismiss Notice
Dismiss Notice
Have you considered the Clinical Biomechanics Boot Camp Online, for taking it to the next level? See here for more.
Dismiss Notice
Have you liked us on Facebook to get our updates? Please do. Click here for our Facebook page.
Dismiss Notice
Do you get the weekly newsletter that Podiatry Arena sends out to update everybody? If not, click here to organise this.

Barefoot v's shod and traction

Discussion in 'Biomechanics, Sports and Foot orthoses' started by scotfoot, Nov 22, 2018.

  1. scotfoot

    scotfoot Well-Known Member

    Members do not see these Ads. Sign Up.
    In experiments were the efficiency of barefoot running is compared to shod , how important is traction (in the sense of grip)?

    Based the video below , I would say that the importance of traction in these types of comparison may have been greatly underestimated since the featured runner's foot is clearly sliding backwards on the road surface during push off .

    Check this for yourself by placing your thumb nail at the end off the great toe at the end of midstance and then watch the foot slide back .

    If power is being lost on a road surface in the unshod condition then how much greater must the effect be on a treadmill ?

    Video ; note the section of interest occurs about 1min 5 secs into the film . Note also the end of the great toe being almost "sucked" back relative to the picture frame .

    Haile Gebrselassie Running in Slow Motion Barefoot & Shod - YouTube

    upload_2018-11-22_12-12-27.jpeg ▶ 1:58
    25 Jan 2017 - Uploaded by Super LondaAthletics Fitness.
  2. scotfoot

    scotfoot Well-Known Member

    So why does the runner not feel the foot slip ? Perhaps because foot movement is the norm within a running shoe .
  3. scotfoot

    scotfoot Well-Known Member

  4. scotfoot

    scotfoot Well-Known Member

    A slightly different version of the video of Haile here . About 36 secs in , the footage freeze frames for a second or so and the position of the SHOD standing foot is marked with a line . The footage continues and you can see that , unlike with the unshod condition where the foot "slides " posteriorly during toe off ,with the shod condition the foot does not move posteriorly .

    Different patterns of movement at push off caused by traction levels ?

  5. scotfoot

    scotfoot Well-Known Member

    So at the risk of causing a few researchers headaches over the weekend what happens when an unshod individual runs over a force plate ?

    If the foot slips posteriorly at push off , as with the two examples above , then push off data might be being completely misinterpreted for this phase of gait .

    After all , Hailes big toe seems to move posteriorly a full inch from midstance to end of push off during unshod gait and my understanding is that most research data has been collected and analysed without factoring in this kind of foot/substrate interaction .
  6. scotfoot

    scotfoot Well-Known Member

    My understanding is that Haile habitually trains in footwear . You can see in the videos above that when running shod his foot does not slip but when barefoot it does .
    One can speculate that if he trained barefoot ,then over time , his CNS would pick up the slip and his stride would shorten to prevent the wasted energy . So shoes allow for a longer and possibly more effective running stride because they improve traction ?

    Below is a short video of Seb Coe and "the perfect stride . "
    But would it even be possible without spikes ?

    Seb Coe-The Perfect Stride - YouTube

    upload_2018-11-25_9-48-43.jpeg ▶ 0:20
    9 Jan 2014 - Uploaded by Tim BarnesSeb Coe-The Perfect Stride. Tim Barnes. Loading... Unsubscribe from Tim Barnes? Cancel Unsubscribe

Share This Page