Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Lower Leg Swelling and Muscle Co-Contraction During Prolonged Standing: An Unstable Footwear Evaluation Publisher



Karimi Z1 ; Azghani MR2 ; Allahyari T3
Authors
Show Affiliations
Authors Affiliations
  1. 1. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Biomechanics, Faculty of Mechanical Engineering, Sahand University of Technology, Tabriz, Iran
  3. 3. Department of Occupational Health, School of Health, Urmia University of Medical Sciences, Urmia, Iran

Source: Footwear Science Published:2017


Abstract

The purpose of this study was to investigate the lower leg swelling and muscle co-contraction during prolonged standing with the focus on unstable footwear effects. The EMG signals of medial gastrocnemius and tibialis anterior muscles (bilaterally) were continuously recorded to quantify their co-contraction index (CCI) in 10 healthy asymptomatic subjects during two hours of standing in three footwear conditions including barefoot, stable shoe and unstable shoe. Lower leg circumference changes (swelling) were also monitored over the standing time. During two hours of standing remarkable reduction in lower leg circumference changes and significant reduced CCI level for both legs were observed only for unstable shoe compared to barefoot condition. However, bilaterally, no significant differences were found for both measures between barefoot condition and stable shoe or between two shoe conditions (stable and unstable). The unstable shoe produced changes in activity pattern of lower leg muscles which seems to be advantageous for venous pump mechanism during prolonged standing. These findings suggest that unstable footwear can be used as ergonomic intervention for prolonged standing during work or daily activities. © 2017 Informa UK Limited, trading as Taylor & Francis Group.
Related Docs
1. Nonlinear Analysis of Postural Changes Related to the Movement Interventions During Prolonged Standing Task, Ergonomics (2023)
2. Determining the Interactions Between Postural Variability Structure and Discomfort Development Using Nonlinear Analysis Techniques During Prolonged Standing Work, Applied Ergonomics (2021)
3. Goal Equivalent Manifold Analysis of Task Performance in Non-Specific Lbp and Healthy Subjects During Repetitive Trunk Movement: Effect of Load, Velocity, Symmetry, Human Movement Science (2017)
4. Changes in Neck and Shoulder Muscles Fatigue Threshold When Using a Passive Head/Neck Supporting Exoskeleton During Repetitive Overhead Tasks, Human Factors (2023)
Experts (# of related papers)
Adel Mazloumi (3)
Amir Homayoun Jafari (2)