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OpenTrials
Completed

NCT Number: NCT04467476

Effects of tDCS on Anaerobic Power of Lower Limb Muscles

Anaerobic power and capacity are essential in many human activities, especially during sports practice that demand a high strength and power of the limbs. Transcranial direct current stimulation is a noninvasive technique that can modulate motor brain areas involved in motor functions and has the potential to optimize muscle capacity. However, their effects on mechanical power are lacking.

This study aims to investigate the effects of transcranial direct current stimulation (tDCS) on mechanical power in healthy subjects.

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Key information

Conditions

Healthy Volunteers

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2 / Phase 3

Primary location

Department of Physical Therapy. Federal University of Piaui

Parnaíba, Piauí, 64202020, Brazil

About this study

In this study, a randomized, crossover, double-blind, placebo-controlled experimental design will be used. The 50 participants will be randomized into two groups: (1) Anodal tDCS(real) and (2) Sham tDCS. A single session of anodal and sham tDCS will be performed on each task (pre and post-jump test).

All evaluations will be performed by a single researcher who, like the participants, will not know which stimulation group will be participating. Subjects who agree to the conditions and sign the consent form may participate in the study. Participants who meet the eligibility criteria will be included in the study.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Healthy subjects with no complaints of pain or any kind of discomfort in the musculoskeletal system

Exclusion criteria

  • Musculoskeletal or neurological disorder
  • Under medication
  • Previous treatment with tDCS

Treatment and study plan

Transcranial Direct Current Stimulation

Device

Transcranial direct current stimulation (tDCS) is a noninvasive brain stimulation (NIBS) technique that has been investigated for the management of various health conditions. However, its ergogenic effect still has controversial results.

Primary outcomes

  1. Mean anaerobic power

    Time frame: Pre and Post-test (immediately after tDCS)

    Mean anaerobic power will be evaluated by assessing the ground reaction forces (GRF) and the number of jumps in each test by means of the kinetic analysis of the 60-second vertical jump test (Bosco's Test).

Secondary outcomes

  1. Peak anaerobic power

    Time frame: Pre and Post-test (immediately after tDCS)

    Peak anaerobic power will be evaluated by assessing the ground reaction forces (GRF) and the number of jumps in each test by means of the kinetic analysis of the 60-second vertical jump test (Bosco's Test).

  2. Fatigue index

    Time frame: Pre and Post-test (immediately after tDCS)

    Fatigue index will be evaluated by assessing the ground reaction forces (GRF) and the number of jumps in each test by means of the kinetic analysis of the 60-second vertical jump test (Bosco's Test).

    The fatigue index corresponds to the power reduction rate expressed as a percentage and reveals the degree of reduction in the ability to produce strength and maintain exercise.

  3. Rating of perceived exertion

    Time frame: Post-test (immediately after tDCS)

    The subjective feeling of effort will be assessed by the Borg scale for perceived effort. This is a 15-point numerical scale that ranges from 6 to 20, where 6 means "no exertion at all" and 20 means "maximal exertion."

Sponsors and collaborators

Lead sponsor

Universidade Federal do Piauí

Other

Registry information

Official study title

Effects of tDCS on Mechanical Power of the Leg Extensor Muscles of Healthy Subjects

Important dates

Study start
2021
Primary completion
2021
Study completion
2021
First posted
Jul 13, 2020
Registry last updated
May 3, 2021

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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