11/9/2023 0 Comments Heel strike definitionA concentric contraction is when the muscle contracts while shortening. An eccentric muscle contraction is when the muscle is contracting but also lengthening. Posterior tibialis, located on the posterior and medial side of the shin eccentrically controls pronation. Pronation is both normal and necessary for weight acceptance in the gait cycle. As this occurs the foot is also moving into pronation as a way to absorb impact forces and deal with uneven terrain. This eccentric muscle control is performed primarily by the anterior tibialis muscle. From here the foot in eccentrically lowered toward the ground as the entire sole touches the ground. The hallmark of this pattern is, of course, the heel contacting the ground first. Normally the first point of contact is the lateral heel, placing the foot in a slightly dorsiflexed position. Let's start with the heel strike pattern. Without understanding normal mechanics of the foot and ankle the "why" of shoe selection won't make much sense. Before we talk about design choice let's discuss mechanics of the foot and ankle during a heel strike and a forefoot strike. What really matters when it comes to footwear selection for runners?īased on your foot strike pattern I see a few design factors that really make a difference in reducing stresses on the foot and ankle, especially pronation forces. Cushioned, minimal, motion control, zero drop, the choices are endless. Footwear choice for runners will forever be a hot topic.
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