The present study examined the effects of transcranial direct current stimulation using Halo Sport on the time to exhaustion in relation with muscle activities and corticomuscular coupling of agonist and antagonist muscles during a sustained isometric fatiguing contraction performed with the elbow flexors. Twenty healthy male college students were randomly assigned to tDCS group and control group. The two group participants performed two experimental sessions which consisted of pre-fatigue isometric maximal voluntary contraction, sustained submaximal voluntary contractions performed to exhaustion, and (...) post-fatigue MVC with the right elbow flexor muscles. Sham stimulation and tDCS were applied for control and tDCS group participants 20 min prior to the second session test, respectively. MVC strength in pre- and post-fatigue test, TTE, electroencephalogram, and electromyography of biceps brachii and triceps brachii were recorded during the tests. It was found that tDCS using the Halo Sport device significantly increased TTE and thus improved muscular endurance performance. The improvement may be partly related to the improvement of neuromuscular efficiency as reflected by decrease of antagonistic muscle coactivation activities, which may be related to cortical originated central processing mechanism of neuromuscular activities. (shrink)

Apart from a short clarification of what neuro-doping is, the aim of this article is twofold. First to give a few reasons in favour of having a special issue on neuro-doping. Second to present an overview of the articles in this issue. One reason for having this special issue, is that it needs to be established whether methods such as transcranial direct-current stimulation should be added to World Anti-Doping Agency’s prohibited list or not, as it is currently under discussion by (...) WADA. Another reason for dealing with the ethics of neuro-doping is that ethical analysis of the use or possible use of neuro-doping in sport is a neglected subject. This issue cover a wide range of ethical analyses of the use of neuro-doping among athletes, chess players, e-gamers and even couch potatoes. For example, whether tDCS ought to be prohibited by WADA and/or the state; or whether its use ought to be promoted by the state; whether the use of neuro-doping is unfair; or whether it should be allowed for businesses to advertise high-sugar, high-caffeine beverages to youngsters. (shrink)