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Can Transcranial Direct Current Stimulation Improve the Resistance Strength and Decrease the Rating Perceived Scale

Eduardo Lattari1, Maria L Andrade, Alberto S Filho

  • 11Physical Activity Sciences Post-Graduate Program (PGCAF), Salgado de Oliveira University (UNIVERSO), Niterói, Brazil; 2Rehabilitation Science Masters Program, Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil; 3School of Allied Health Sciences, Polytechnic Institute of Porto, Porto, Portugal; 4School of Psychology, Nanjing Normal University, Nanjing, China; and 5University of Trastornos del Movimiento y Sueño (TMS), Hospital General Dr. Manuel Gea Gonzalez, Secretaria de Salud, México, Mexico.

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|April 22, 2016
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Summary
This summary is machine-generated.

Anodic transcranial direct current stimulation (a-tDCS) can enhance strength training performance by increasing repetitions completed. This stimulation also reduces perceived exertion during resistance exercise for recreational weightlifters.

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Area of Science:

  • Neuromodulation
  • Sports Science
  • Exercise Physiology

Background:

  • Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique.
  • Its potential to enhance physical performance, particularly in resistance training, is an area of ongoing research.

Purpose of the Study:

  • To evaluate the acute effects of anodic transcranial direct current stimulation (a-tDCS) on exercise volume and perceived exertion.
  • To compare a-tDCS with conventional tDCS (c-tDCS) and sham tDCS in recreational weight-training individuals.

Main Methods:

  • Ten recreationally trained participants performed elbow flexion exercises with a 10-repetition maximum (10RM) load.
  • Participants received 20-minute tDCS protocols (anodic, conventional, or sham) in a randomized crossover design.
  • Exercise performance (repetitions) and perceived exertion (OMNI-RES scale) were measured before and after stimulation.

Main Results:

  • A significant increase in completed repetitions was observed after the a-tDCS condition compared to c-tDCS and sham conditions.
  • Perceived exertion decreased significantly following a-tDCS, whereas it increased after c-tDCS.
  • An interaction between condition and time indicated that a-tDCS improved performance and reduced exertion post-session.

Conclusions:

  • A 20-minute session of a-tDCS appears beneficial for strength training practitioners experiencing high perceived exertion and reduced training capacity.
  • Anodic tDCS may be a viable strategy to acutely enhance resistance exercise performance and manage exertion levels in recreational lifters.