Effects of soft orthotics on sEMG activity of superficial leg muscles during walking with supinated

NewsBot · Jan 10, 2013

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Effects of soft orthotics on sEMG activity of superficial leg muscles during walking with supinated feet.
Azizpour, S.; Anbarian, M.
Scientific Journal of Kurdistan University of Medical Sciences 2012 Vol. 17 No. 3 pp. Pe11-Pe19, En2

Background and Aim: The purpose of this study was to evaluate the effects of a soft semi-custom foot orthotic on leg muscles activity during stance and swing phases of walking in three different conditions namely, bare foot, with shoes only, and wearing shoes with soft insoles in individuals with supinated feet.

Material and Methods: Ten subjects with bilateral idiopathic pescavus deformity were entered into the study. Foot types were defined by FPI method. Surface electromyographic signals from the tibialis anterior, peroneus longus, gastrocnemius medialis and lateralis and soleus were recorded using EMG system at a sampling rate of 1000 Hz according to the SENIAM protocol.

Results: Our findings showed a little change in muscle activation during walking, but no significant difference was detected in the muscles in the three conditions.

Conclusion: Although use of orthotics resulted in no significant difference in the parameters in this study, different individuals showed different responses and the results of this study can be taken into consideration for designing orthotics.
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Admin2 · Jan 10, 2013

Related threads:
Other threads tagged with pes cavus
Effect of foot orthotics on EMG of lower leg muscles
Effects of orthotics on high and low arched feet

efuller · Jan 10, 2013

This should be linked to the clarifying biomechanics thread where we are disscussing different foot types that could have a high lateral load. It does make me appreciate the reason that Mert Root proposed classifying based on STJ neutral. Different feet behave differently. Just taking cavus feet is not enough of a differentiation. If you treat them with same orthotic you will get the results seen here. The results may have been more consistent if STJ axis location and maximum eversion height were used to separate the patients into different groups.

Eric

David Smith · Jan 12, 2013

Here's a paper along the same lines that has similar conclusions

Dave Smith

NewsBot · Aug 22, 2018

Muscle activation during fast walking with two types of foot orthoses in participants with cavus feet
GabrielMoisanabcMartinDescarreauxbcVincentCantinbc
Journal of Electromyography and Kinesiology; 18 August 2018

The aim of this study was to quantify the effects of foot orthoses (FOs) with and without a lateral bar on muscle activity of participants with cavus feet. Fifteen participants were recruited from the Université du Québec à Trois-Rivières students and podiatry clinic. The muscle activity of the tibialis anterior, fibularis longus, gastrocnemius lateralis and medialis, vastus medialis and lateralis, biceps femoris and gluteus medius were recorded during fast walking under two experimental conditions (FOs with and without a lateral bar) and a control condition (shoes). Experimentations were completed after a one-month adaptation period to each experimental condition. The root mean square of the electromyography (EMG) data was analyzed. To compare the effects between conditions, a curve analysis was performed using one-dimensional statistical parametric mapping. The main result of this study was an increased gastrocnemius lateralis muscle activity (maximum mean difference: +28%) during the propulsion phase of gait (44-46%) when participants wore FOs compared to the control condition. This result will help researchers and clinicians better understand the FOs’ EMG effects of individuals with cavus feet. As FOs are mainly prescribed for symptomatic patients, future studies should assess their effects on individuals suffering of a pathology, such as Achilles tendinopathy.
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