Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/13006
Title: The effects of direct current stimulation on exercise performance, pacing and perception in temperate and hot environments
Authors: Barwood, MJ
Butterworth, J
Corbett, J
Goodall, S
House, JR
Laws, R
Nowicky, AV
Keywords: Anodal stimulation;Fixed and self-paced exercise;Environmental temperature
Issue Date: 2016
Publisher: Elsevier
Citation: Brain Stimulation, (2016)
Abstract: Background. Transcranial direct current stimulation (tDCS) is a non-invasive neuromodulatory technique and has previously been shown to enhance submaximal exercise by reducing rating of perceived exertion (RPE). The present study examined the effects of tDCS on high-intensity self-paced exercise in temperate conditions and fixed followed by maximal exercise in the heat; it was hypothesised performance and RPE would be altered. Methods. Two separate studies were undertaken in which exercise was preceded by 20-minutes of sham tDCS (SHAM), or anodal tDCS (TDCS). Study 1: six males completed a 20-km cycling time trial, on two occasions. Power output (PO), RPE, O2 pulse, and heart rate (HR) were measured throughout. Study 2: eight males completed fixed intensity cycling exercise at 55% of a pre-determined maximal power output (PMax) for 25-minutes before undertaking a time to exhaustion test (TTE; 75% PMax) in hot conditions (33°C), on two occasions. Test duration, heart rate, thermal and perceptual responses were measured. Study specific and combined statistical analyses was undertaken and effect sizes established.. Results. Study 1: mean PO was not improved with the tDCS (197 ± 20 W) compared to SHAM (197 ± 12 W) and there were no differences in pacing profile HR, O2 pulse or RPE (p > .05). Study 2: TTE duration (SHAM 314 ± 334 s cf 237 ± 362 s tDCS), thermal, heart rate and perceptual responses were unchanged by tDCS compared to SHAM (p > .05). When combined, performance in the SHAM trial tended to better than the tDCS. Conclusion. tDCS did not influence cycling performance (study 1) exercise tolerance (study 2) or perception (studies 1&2). tDCS does not appear to facilitate high intensity exercise performance or exercise performance in the heat.
URI: http://www.sciencedirect.com/science/article/pii/S1935861X1630198X
http://bura.brunel.ac.uk/handle/2438/13006
DOI: http://dx.doi.org/10.1016/j.brs.2016.07.006
ISSN: 1935-861X
Appears in Collections:Dept of Clinical Sciences Research Papers

Files in This Item:
File Description SizeFormat 
Fulltext.pdf735.33 kBAdobe PDFView/Open


Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.