4.6 Article

Biomechanical Analysis of Running in Shoes with Different Heel-to-Toe Drops

Journal

APPLIED SCIENCES-BASEL
Volume 11, Issue 24, Pages -

Publisher

MDPI
DOI: 10.3390/app112412144

Keywords

heel-to-toe drop; strike pattern; knee; ankle; injury

Funding

  1. National Natural Science Foundation of China [81572212]

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The heel-to-toe drop of running shoes significantly influences running patterns and lower extremity joint loading. Running shoes with large drops may be disadvantageous for runners with knee weakness but advantageous for runners with ankle weakness.
The heel-to-toe drop of running shoes is a key parameter influencing lower extremity kinematics during running. Previous studies testing running shoes with lower or larger drops generally used minimalist or maximalist shoes, where the factors outside of the drop may lead to the observed changes in running biomechanics. Therefore, our aim was to compare the strike patterns, impact force, and lower extremity biomechanics when running in shoes that varied only in their drops. Eighteen habitual rearfoot strikers performed trials wearing running shoes with four drop conditions: 15 mm, 10 mm, 5 mm, and without a drop. Three-dimensional (3D) tracks of the reflective markers and impact force were synchronously collected using a video graphic acquisition system and two force plates. The biomechanical parameters were compared among the four drop conditions using one-way ANOVA of repeated measures. A greater foot inclination angle (p = 0.001, eta p(2) = 0.36) at initial contact and a lower vertical loading rate (p = 0.002, eta p(2) = 0.32) during the standing phase were found when running in shoes with large drops compared with running in shoes without a drop. Running in shoes with large drops, as opposed to without, significantly increased the peak knee extension moment (p = 0.002, eta p(2) = 0.27), but decreased the peak ankle eversion moment (p = 0.001, eta p(2) = 0.35). These findings suggest that the heel-to-toe drop of running shoes significantly influences the running pattern and the loading on lower extremity joints. Running shoes with large drops may be disadvantageous for runners with knee weakness and advantageous for runners with ankle weakness.

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