Biomechanical Analysis of the Stance Phase During Barefoot and Shod Running

Topics: Foot, Barefoot running, Knee Pages: 3 (1019 words) Published: December 3, 2012
Spencer Long
EXS 101
Biomechanical Analysis of the Stance Phase during Barefoot and Shod Running BY: De Wit, De Clercq, and Peter Aerts, Journal of Biomechanics, 2000.

The aim of this study was to provide a comprehensive description of barefoot running and to compare barefoot with shod running. The researchers found that wearing shoes changes the way you run, which running on soft surfaces or uneven surfaces does not. So running with shoes on is not the same, theoretically, as running on foam or grass. Wearing shoes makes people start heel striking, which is associated with amateur or beginner runners. The researchers took nine male long distance runners and tested them while running barefoot and shod at three different speeds. The researchers used force plates and video cameras to take the various measurements. The researchers put markers on the skin at the hip, the knee joint and at the ankle joint at the outside of the ankle. In this study, the researchers also put a marker at the shoulder, at the height of the acromion, which is above the shoulder. In the barefoot condition, foot markers were placed at the tuber calcaneum and at the pinkie joint. In the shod condition, markers were placed on the shoe at the height of those landmarks. After the experiment the researchers noted that the runners had many differences between running barefoot and shod. One of the key differences was shorter strides. For all the tested speeds, the runners took significantly smaller steps while running barefoot. This leads to a shorter contact time for all the runners that ran barefoot. Another difference was a higher cadence. When running barefoot, the runners ran with more strides per minute. All of the runners that ran barefoot were characterized by a significantly larger loading rate than in shod running, but not greater forces at the maximum point. Which means that more than one impact peak was found for the barefoot condition. You can see this in figure 3 where the...
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