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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
50
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.
Department of Physical Therapy. Federal University of Piaui
Parnaíba, Piauí, Brazil
Mean anaerobic power
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).
Time frame: Pre and Post-test (immediately after tDCS)
Peak anaerobic power
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).
Time frame: Pre and Post-test (immediately after tDCS)
Fatigue index
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.
Time frame: Pre and Post-test (immediately after tDCS)
Rating of perceived exertion
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."
Time frame: Post-test (immediately after tDCS)
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