Neuromuscular Study to Assess Foot Intrinsic Muscles

Study Overview
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Brief Summary
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The purposes of these studies are to investigate: Differences in abductor hallucis muscles'EMG activities during different postural tasks between individuals with normal foot alignment and functional flat foot. Differences in abductor hallucis muscles'H-reflex amplitudes between individuals with normal foot alignment and functional flat foot. Changes in abductor hallucis muscles'EMG activities during different postural tasks after a 3-week short foot exercises training regimen in individuals with functional flat foot. Changes in abductor hallucis muscles'H-reflex amplitudes after a 3-week short foot exercises training regimen in individuals with functional flat foot. hypotheses: Peak-to-peak amplitudes and ratios of abductor hallucis muscles and tibialis anterior muscles during different postural tasks were significantly lower in individual with functional flat foot when compared to those with normal foot alignments. H-reflex amplitudes of abductor hallucis muscles were significantly lower in individual with functional flat foot when compared to those with normal foot alignments. Changes of peak-to-peak amplitudes and ratios of abductor hallucis muscles and tibialis anterior muscles during different postural tasks were significantly different in individuals with functional flat foot after a 3-week short foot exercise training regimen. Changes of H-reflex amplitudes of abductor hallucis muscles were significantly different in individuals with functional flat foot after a 3-week short foot exercise training regimen

Official Title
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Neuromuscular Assessments of Foot Intrinsic Muscles: (1) Between Individuals With and Without Functional Flatfoot and (2) Before and After a 3-week Short Foot Exercise Training in Individuals With Functional Flatfoot

Conditions
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Flexible Flatfoot

Intervention / Treatment
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* Other: Behavioral: short foot exercise


Participation Criteria
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Eligibility Criteria
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: Inclusion Criteria: Age between 20 and 45 years No ankle injury within the previous 6 months No diagnosed lower extremity injuries No ankle pain at the time of the study Foot posture index score: 0 to +5 for the normal foot (NF) group; +6 to +12 for the functional flat foot (FFF) group Navicular drop: 5-9 mm for the NF group; > 10 mm for the FFF group Exclusion Criteria: Foot posture index score: <0 Navicular drop< 5 mm Leg length discrepancy > 1.5 cm Diagnosed severe scoliosis Neurological injuries over lower extremities

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: normal foot<br>no intervention | |
| Experimental: functional flatfoot<br>Behavioral: short foot exercise | Other: Behavioral: short foot exercise<br>* Behavioral: short foot exercise 30 repetitions per section (10 seconds for each contraction, 1 minute between sections), 3 times/ week, 3 weeks<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Muscle activities: EMGs (mV) | EMGs (mV) in each posture | Baseline | 
| Muscle activities: H-reflexes (mV) | H-reflexes (mV) in each posture | Baseline | 
| Muscle activities change will being assessed: EMGs (mV) | EMGs (mV) in each posture | Baseline. week 3 | 
| Muscle activities change will being assessed: H-reflexes (mV) | H-reflexes (mV) in each posture | Baseline. week 3 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Electromyography,Excessive Foot Pronation,exercise,neurology,physical therapy