Transcranial Direct Current Stimulation: No Effect on Aerobic Performance, Heart Rate, or Rating of Perceived Exertion in a Progressive Taekwondo-Specific Test

2020 ◽  
Vol 15 (7) ◽  
pp. 958-963
Author(s):  
Paulo H.C. Mesquita ◽  
Emerson Franchini ◽  
Marco A. Romano-Silva ◽  
Guilherme M. Lage ◽  
Maicon R. Albuquerque
Keyword(s):  
Heart Rate ◽  
Direct Current ◽  
Effect Size ◽  
Transcranial Direct Current Stimulation ◽  
Perceived Exertion ◽  
National Level ◽  
Rating Of Perceived Exertion ◽  
Aerobic Performance ◽  
Time To Exhaustion ◽  
Direct Current Stimulation

Purpose: To investigate the effects of anodal transcranial direct current stimulation (a-tDCS) on the aerobic performance, heart rate (HR), and rating of perceived exertion (RPE) of highly trained taekwondo athletes. Methods: Twelve (8 men and 4 women) international/national-level athletes received a-tDCS or sham treatment over the M1 location in a randomized, single-blind crossover design. The stimulation was delivered at 1.5 mA for 15 min using an extracephalic bihemispheric montage. Athletes performed the progressive-specific taekwondo test 10 min after stimulation. HR was monitored continuously during the test, and RPE was registered at the end of each stage and at test cessation. Results: There were no significant differences between sham and a-tDCS in time to exhaustion (14.6 and 14.9, respectively, P = .53, effect size = 0.15) and peak kicking frequency (52 and 53.6, respectively, P = .53, effect size = 0.15) or in HR (P > .05) and RPE responses (P > .05). Conclusions: Extracephalic bihemispheric a-tDCS over M1 did not influence the aerobic performance of taekwondo athletes or their psychophysiological responses, so athletes and staff should be cautious when using it in a direct-to-consumer manner.

Can Transcranial Direct Current Stimulation Modulate Psychophysiological Response in Sedentary Men during Vigorous Aerobic Exercise?

2017 ◽  
Vol 38 (07) ◽  
pp. 493-500 ◽  
Author(s):  
Alexandre Okano ◽  
Daniel Machado ◽  
Leônidas Oliveira Neto ◽  
Luiz Farias-Junior ◽  
Pedro Agrícola ◽  
...  
Keyword(s):  
Heart Rate ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Perceived Exertion ◽  
Temporal Cortex ◽  
Affective Responses ◽  
Rating Of Perceived Exertion ◽  
Repeated Measure ◽  
Vigorous Exercise ◽  
Direct Current Stimulation

AbstractThis study evaluated whether transcranial direct current stimulation (tDCS) could change physiological and psychological responses during vigorous exercise with a constant load. 13 sedentary males (23.0±4.2 years; 25.6±4.2 kg/m²) took part in this randomized, crossed-over, sham-controlled, and double-blinded study. Participants underwent 2 sessions with anodal or sham tDCS (2 mA, 20 min) applied before exercise over the left temporal cortex targeting the left insular cortex. The exercise was performed at vigorous intensity (%HRmax 81.68±6.37) for 30 min. Heart rate (HR), rating of perceived exertion (RPE) and affective responses (pleasure/displeasure) were recorded at every 5 min. Additionally, heart rate variability (HRV) was measured before, immediately after and 60 min after the end of exercise. A 2-way repeated measure ANOVA showed that tDCS improved HRV neither at rest nor after exercise (p>0.15). Similarly, HR, RPE, and affective responses were not enhanced by tDCS during vigorous exercise (p>0.23). The findings of this study suggest that tCDS does not modulate either HRV at rest nor HR, RPE and affective responses during exercise. Transcranial direct current stimulation’s efficiency might depend on the participants’ levels of physical fitness and parameters of stimulation (e. g., duration, intensity, and arrangement of electrodes).

scholarly journals The effects of transcranial direct current stimulation on objective and subjective indexes of exercise performance: a systematic review and meta-analysis.

2018 ◽  
Author(s):  
Darias Holgado ◽  
Miguel A. Vadillo ◽  
Daniel Sanabria
Keyword(s):  
Systematic Review ◽  
Direct Current ◽  
Exercise Performance ◽  
Transcranial Direct Current Stimulation ◽  
Perceived Exertion ◽  
Effect Sizes ◽  
Electrode Placement ◽  
Current Evidence ◽  
Time To Exhaustion ◽  
Direct Current Stimulation

Objective: To examine the effectss of transcranial direct current stimulation (tDCS) on objective and subjective indexes of exercise performance.Design: Systematic review and meta-analysis.Data Sources: A systematic literature search of electronic databases (PubMed, Web of Science, Scopus, Google Scholar) and reference lists of included articles up to June 2018.Eligibility Criteria: Published articles in journals or in repositories with raw data available, randomized sham-controlled trial comparing anodal stimulation with a sham condition providing data on objective (e.g. time to exhaustion or time-trial performance) or subjective (e.g. rate of perceived exertion) indexes of exercise performance.Results: The initial search provided 420 articles of which 31 were assessed for eligibility. Finally, the analysis of effect sizes comprised 24 studies with 386 participants. The analysis indicated that anodal tDCS had a small but positive effect on performance g = 0.34, 95% CI [0.12, 0.52], z = 3.24, p = 0.0012. Effects were not significantly moderated by type of outcome, electrode placement, muscles involved, number of sessions, or intensity and duration of the stimulation. Importantly, the funnel plot showed that, overall, effect sizes tended to be larger in studies with lower sample size and high standard error. Summary: The results suggest that tDCS may have a positive impact on exercise performance. However, the effect is probably small and most likely biased by low quality studies and the selective publication of significant results. Therefore, the current evidence does not provide strong support to the conclusion that tDCS is an effective means to improve exercise performance.

scholarly journals Transcranial Direct Current Stimulation Decreases the Decline of Speed during Repeated Sprinting in Basketball Athletes

2021 ◽  
Vol 18 (13) ◽  
pp. 6967
Author(s):  
Che-Hsiu Chen ◽  
Yu-Chun Chen ◽  
Ren-Shiang Jiang ◽  
Lok-Yin Lo ◽  
I-Lin Wang ◽  
...  
Keyword(s):  
Heart Rate ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Fatigue Index ◽  
Countermovement Jump ◽  
Basketball Players ◽  
Jump Performance ◽  
Jump Test

The purpose of this study was to determine whether transcranial direct current stimulation (tDCS) can improve countermovement jump performance, fatigue index and alleviate the speed decline during repeated shuttle sprints in trained basketball players. Thirteen trained basketball players were divided into the tDCS trial and sham trial by the random crossover design. The tDCS trial was stimulated with 2-mA current in the M1 area in the middle of the top of the head for 20 min. For the sham trial, the current was turned off after 5 s, stopping the electrical stimulation. After warming up, the players underwent countermovement jump test, weighted countermovement jump test and then performed 40 × 15-m sprints with with a 1:4 exercise: rest ratio. The jump height, sprinting time, fatigue index, heart rate and rating of perceived exertion (RPE) were analyzed by paired-sample t-test, when significance was discovered by two-way repeated measures analysis of variance. The study results revealed that the tDCS trial significantly increase the countermovement jump performance (p = 0.04), decrease the sprinting time (p = 0.016), and had improved fatigue index during the sprinting process (p = 0.009). However, the heart rate and RPE during sprinting were nonsignificantly different between the trials. This study has identified that tDCS can decrease the speed decline, fatigue index during sprinting and increase countermovement jump performance without affecting heart rate or the rating of perceived exertion.

scholarly journals No Effect of Transcranial Direct Current Stimulation on Anaerobic Test Performance in Resistance-trained Individuals

2021 ◽  
Keyword(s):  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Test Performance ◽  
Perceived Exertion ◽  
Rest Period ◽  
Rating Of Perceived Exertion ◽  
Wingate Anaerobic Test ◽  
Direct Current Stimulation ◽  
Dependent Variables ◽  
Anaerobic Test

Introduction: Transcranial direct current stimulation (tDCS) sends a weak electrical current through the cerebral cortex. tDCS has been shown to be effective in longer activities (>75s) but minimal research has been performed with short, anaerobic tests. The purpose of this study was to determine the effect of tDCS on Wingate Anaerobic Test (WAnT) performance. Methods: Fifteen young, resistance-trained adults (23.7±2.7 years; BMI 24.9±2.6 kg×m-2; 12 males) volunteered for this study. Electrodes were placed at T3 and FP2 for anodal stimulation of the insular cortex (IC), and 2mA of current was supplied for 20 minutes; after a short rest period, subjects performed a WAnT. Dependent variables included peak/mean/relative power, peak heart rate (HR) and rating of perceived exertion (RPE). Experimental and sham conditions were utilized. Paired-samples t-tests were used to determine the effect of tDCS on the dependent variables. Results: Peak power in the experimental condition (1,019.0±237.5W) was not different than that of the sham (1,008.3±240.4W; p=.638). There were no differences in any other WAnT variables, and no differences in peak HR or RPE (all p>.05). Conclusions: The results from this study suggest that tDCS in resistance-trained individuals is not effective in improving performance on an anaerobic test. In addition, it is still considered experimental and its ethical use is questionable.

A Systematic Review of Submaximal Cycle Tests to Predict, Monitor, and Optimize Cycling Performance

2016 ◽  
Vol 11 (6) ◽  
pp. 707-714 ◽  
Author(s):  
Benoit Capostagno ◽  
Michael I. Lambert ◽  
Robert P. Lamberts
Keyword(s):  
Heart Rate ◽  
Power Output ◽  
Perceived Exertion ◽  
Heart Rate Recovery ◽  
Mechanical Efficiency ◽  
Cycling Performance ◽  
Rating Of Perceived Exertion ◽  
Time To Exhaustion ◽  
Gross Mechanical Efficiency ◽  
Multiple Variables

Finding the optimal balance between high training loads and recovery is a constant challenge for cyclists and their coaches. Monitoring improvements in performance and levels of fatigue is recommended to correctly adjust training to ensure optimal adaptation. However, many performance tests require a maximal or exhaustive effort, which reduces their real-world application. The purpose of this review was to investigate the development and use of submaximal cycling tests that can be used to predict and monitor cycling performance and training status. Twelve studies met the inclusion criteria, and 3 separate submaximal cycling tests were identified from within those 12. Submaximal variables including gross mechanical efficiency, oxygen uptake (VO2), heart rate, lactate, predicted time to exhaustion (pTE), rating of perceived exertion (RPE), power output, and heart-rate recovery (HRR) were the components of the 3 tests. pTE, submaximal power output, RPE, and HRR appear to have the most value for monitoring improvements in performance and indicate a state of fatigue. This literature review shows that several submaximal cycle tests have been developed over the last decade with the aim to predict, monitor, and optimize cycling performance. To be able to conduct a submaximal test on a regular basis, the test needs to be short in duration and as noninvasive as possible. In addition, a test should capture multiple variables and use multivariate analyses to interpret the submaximal outcomes correctly and alter training prescription if needed.

Effects of Transcranial Direct Current Stimulation With Caffeine Intake on Muscular Strength and Perceived Exertion

2019 ◽  
Vol 33 (5) ◽  
pp. 1237-1243 ◽  
Author(s):  
Eduardo Lattari ◽  
Lucas A. F. Vieira ◽  
Bruno R. R. Oliveira ◽  
Gözde Unal ◽  
Marom Bikson ◽  
...  
Keyword(s):  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Muscular Strength ◽  
Perceived Exertion ◽  
Caffeine Intake ◽  
Direct Current Stimulation

Ergogenic Effects of Bihemispheric Transcranial Direct Current Stimulation on Fitness: a Randomized Cross-over Trial

2020 ◽  
Vol 42 (01) ◽  
pp. 66-73
Author(s):  
Roberto Codella ◽  
Rosario Alongi ◽  
Luca Filipas ◽  
Livio Luzi
Keyword(s):  
Physical Fitness ◽  
Athletic Training ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Crossover Fashion ◽  
Endurance Running ◽  
Direct Current Stimulation ◽  
The Impact

AbstractSeveral types of routines and methods have been experimented to gain neuromuscular advantages, in terms of exercise performance, in athletes and fitness enthusiasts. The aim of the present study was to evaluate the impact of biemispheric transcranial direct current stimulation on physical fitness indicators of healthy, physically active, men. In a randomized, single-blinded, crossover fashion, seventeen subjects (age: 30.9 ± 6.5 years, BMI: 24.8±3.1 kg/m2) underwent either stimulation or sham, prior to: vertical jump, sit & reach, and endurance running tests. Mixed repeated measures anova revealed a large main effect of stimulation for any of the three physical fitness measures. Stimulation determined increases of lower limb power (+ 5%), sit & reach amplitude (+ 9%) and endurance running capacity (+ 12%) with respect to sham condition (0.16<ηp2 < 0.41; p<0.05). Ratings-of-perceived-exertion, recorded at the end of each test session, did not change across all performances. However, in the stimulated-endurance protocol, an average lower rate-of-perceived-exertion at iso-time was inferred. A portable transcranial direct current stimulation headset could be a valuable ergogenic resource for individuals seeking to improve physical fitness in daily life or in athletic training.

scholarly journals Transcranial Direct Current Stimulation for Parkinson's Disease: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 13 ◽  
Author(s):  
Xiang Liu ◽  
Huiyu Liu ◽  
Zicai Liu ◽  
Jinzhu Rao ◽  
Jing Wang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Motor Function ◽  
Direct Current ◽  
Effect Size ◽  
Transcranial Direct Current Stimulation ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Direct Current Stimulation

Background: Parkinson's disease is a common neurodegenerative disorder with motor and non-motor symptoms. Recently, as adjuvant therapy, transcranial direct current stimulation (tDCS) has been shown to improve the motor and non-motor function of patients with Parkinson's disease (PD). This systematic review aimed to evaluate the existing evidence for the efficacy of tDCS for PD. We included English databases (PubMed, the Cochrane Library, Embase, and Web of Science) and Chinese databases [Wanfang database, China National Knowledge Infrastructure (CNKI), China Science and Technology Journal Database (VIP), and China Biology Medicine (CBM)] without restricting the year of publication. Twenty-one tDCS studies, with a total of 736 participants, were included in the analysis. Two independent researchers extracted the data and characteristics of each study. There was a significant pooled effect size (−1.29; 95% CI = −1.60, −0.98; p &lt; 0.00001; I2 = 0%) in the Unified PD Rating Scale (UPDRS) I and the Montreal cognitive assessment (SMD = 0.87, 95% CI = 0.50 to 1.24; p &lt; 0.00001; I2 = 0%). The poor effect size was observed in the UPDRS III scores (SMD = −0.13; 95% CI = −0.64, 0.38; p = 0.61; I2 = 77%), and similar results were observed for the timed up and go (TUG) test, Berg balance scale, and gait assessment. The results of this meta-analysis showed that there was insufficient evidence that tDCS improves the motor function of patients with PD. However, tDCS seemed to improve their cognitive performance. Further multicenter research with a larger sample size is needed. In addition, future research should focus on determining the tDCS parameters that are most beneficial to the functional recovery of patients with PD.

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