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Anodal Transcranial Direct Current Stimulation Does Not Affect Velocity Loss During a Typical Resistance Exercise
Guilherme Moraes Rodrigues1, Bruno Ribeiro Ramalho de Oliveira2, Marco Antonio Jesus Abreu1
1Salgado de Oliveira University (UNIVERSO).
Research Quarterly for Exercise and Sport
|April 12, 2022
Summary
Transcranial direct current stimulation (tDCS) did not alter movement velocity during resistance exercise. This study found no significant differences in velocity loss between anodal tDCS and sham conditions in recreationally trained males.
Area of Science:
- Neuroscience
- Sports Science
- Exercise Physiology
Background:
- Neuromodulation techniques like transcranial direct current stimulation (tDCS) are increasingly explored for enhancing physical performance.
- Understanding the impact of tDCS on resistance training metrics, such as velocity loss, is crucial for optimizing training protocols.
Purpose of the Study:
- To investigate the effects of anodal transcranial direct current stimulation (tDCS) on velocity loss during a standard resistance exercise session.
- To determine if tDCS can modulate neuromuscular fatigue as indicated by changes in movement velocity.
Main Methods:
- Twelve recreationally trained males participated in a counterbalanced crossover study with anodal tDCS and sham conditions.
- tDCS was applied to the left dorsolateral prefrontal cortex (2 mA for 20 min).
- Subjects performed three sets of bench press at 70% of 1RM with 1-minute rest, with velocity loss calculated per set.
Main Results:
- No significant interaction was found between tDCS conditions and exercise sets regarding velocity loss (P = .122).
- There were no significant main effects for condition (P = .323) or set (P = .364) on velocity loss.
- Average velocity loss did not differ between the anodal tDCS (-25.0 ± 4.7%) and sham (-23.3 ± 6.4%) conditions (P = .323).
Conclusions:
- Anodal tDCS does not appear to influence movement velocity during a typical resistance training protocol in recreationally trained individuals.
- The findings suggest that tDCS, under these specific parameters, may not be an effective ergogenic aid for mitigating fatigue-related velocity decrements in strength training.
