Effects of tDCS on Maximal Isometric Strength and Endurance Test of Trunk Extensors.

Study Overview
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Brief Summary
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Improving trunk muscle strength and endurance is one of the many goals to be achieved in rehabilitation protocols for a variety of health conditions. Cerebral electrical stimulations techniques, such as transcranial direct current stimulation (tDCS) can modulate motor brain areas involved in motor functions. However, their effects on trunk function are lacking. This study aims to investigate the effects of transcranial direct current stimulation (tDCS) on trunk muscle strength and endurance in healthy subjects.

Official Title
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Effects of tDCS on Maximal Isometric Strength and Endurance Test of Trunk Extensors in Healthy Subjects.

Conditions
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Healthy

Intervention / Treatment
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* Device: Transcranial direct current stimulation (tDCS)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy subjects with no complaints of pain, discomfort in the musculoskeletal system. Exclusion Criteria: Musculoskeletal or neurological disorder Under medication

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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Female

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: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Active tDCS<br>Anodal tDCS over trunk motor cortex representation. Intensity: 2mA Time: 20 minutes | Device: Transcranial direct current stimulation (tDCS)<br>* The noninvasive and nonpharmacological weak electrical current applied to the scalp to modulate cortical excitability.<br>|
| Sham Comparator: Sham tDCS<br>Anodal tDCS over trunk motor cortex representation. Itensity: 2mA Time: 20 minutes (30s ON) | Device: Transcranial direct current stimulation (tDCS)<br>* The noninvasive and nonpharmacological weak electrical current applied to the scalp to modulate cortical excitability.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Isometric trunk extension | Maximal isometric voluntary contraction (Kgf) | Pre and Post-test (immediately after tDCS) | 
| Trunk muscle endurance | Time to task failure (TTF) on the Sorensen test | Pre and Post-test (immediately after tDCS) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Isometric trunk extension | Maximal isometric voluntary contraction (Kgf) | 15 minutes post-stimulation | 
| Isometric trunk extension | Maximal isometric voluntary contraction (Kgf) | 30 minutes post-stimulation | 
| Trunk muscle endurance | Time to task failure (TTF) on the Sorensen test | 15 minutes post-stimulation | 
| Trunk muscle endurance | Time to task failure (TTF) on the Sorensen test | 30 minutes post-stimulation |