Muscle function in running vs walking

NewsBot · Jul 18, 2006

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Differences in muscle function during walking and running at the same speed
Journal of Biomechanics Volume 39, Issue 11 , 2006, Pages 2005-2013

Individual muscle contributions to body segment mechanical energetics and the functional tasks of body support and forward propulsion in walking and running at the same speed were quantified using forward dynamical simulations to elucidate differences in muscle function between the two different gait modes. Simulations that emulated experimentally measured kinesiological data of young adults walking and running at the preferred walk-to-run transition speed revealed that muscles use similar biomechanical mechanisms to provide support and forward propulsion during the two tasks. The primary exception was a decreased contribution of the soleus to forward propulsion in running, which was previously found to be significant in walking. In addition, the soleus distributed its mechanical power differently to individual body segments between the two gait modes from mid- to late stance. In walking, the soleus transferred mechanical energy from the leg to the trunk to provide support, but in running it delivered energy to both the leg and trunk. In running, earlier soleus excitation resulted in it working in synergy with the hip and knee extensors near mid-stance to provide the vertical acceleration for the subsequent flight phase in running. In addition, greater power output was produced by the soleus and hip and knee extensors in running. All other muscle groups distributed mechanical power among the body segments and provided support and forward propulsion in a qualitatively similar manner in both walking and running.
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Admin2 · Jul 18, 2006

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NewsBot · May 29, 2020

Differences in loading patterns between
fast walking and jogging at the same
speed in male adults
Ruoyi Li
Journal of Leather Science and Engineering

Fast walking and jogging are two common exercises for people to maintain health in daily life. But the differences
in loading patterns of fast walking and jogging are still unclear. The purpose of this study was to compare loading
patterns in fast walking and jogging at the same speed, and to identify how differences in foot mechanics
influence plantar pressure distribution between the two modes of gait. Totally, 49 healthy males participated in this
study. Data of pressure parameters, including maximum force (MF), peak pressure (PP), contact area (CA), force-time
integral (FTI), were recorded by Pedar-X insole plantar pressure measurement system in participants’ fast walking
and jogging process at 7 km/h. A Load transfer analysis method was used to quantify the plantar load transference
from fast walking to jogging. The results showed that MF, PP and CA increased in metatarsal regions and midfoot
regions while decreased in toes regions and heel during jogging when compared with fast walking. FTI decreased
in all foot regions during jogging compared to fast walking. Under the effects of spring mechanics and the varus of
rearfoot during jogging, fast walking and jogging reveal different loading patterns. Compared jogging to fast
walking, load transferred as follow: 1) in transverse direction, load transferred from lateral foot to medial foot in
metatarsal regions and midfoot regions, 2) in longitudinal direction, load transferred from toes to the metatarsal,
and from heel to the metatarsal and midfoot. These results also provide suggestions for footwear designs
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NewsBot The Admin that posts the news.

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