RESEARCH ARTICLE


Cortical Brain Activity is Influenced by Cadence in Cyclists



Kuno Hottenrott1, Marco Taubert2, Thomas Gronwald1, *
1 Department of Sport Science, Martin-Luther-University Halle-Wittenberg, Germany
2 Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany


Article Metrics

CrossRef Citations:
11
Total Statistics:

Full-Text HTML Views: 232
Abstract HTML Views: 210
PDF Downloads: 162
Total Views/Downloads: 604
Unique Statistics:

Full-Text HTML Views: 124
Abstract HTML Views: 97
PDF Downloads: 99
Total Views/Downloads: 320



Creative Commons License
© 2013 Hottenrott et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Sport Science, Martin-Luther-University Halle-Wittenberg, Von-Seckendorff-Platz 2, 06120 Halle (Saale), Germany; Tel: +49 (0) 345 55 244 29; Fax: +49 (0) 345 55 270 54; E-mail: thomas.gronwald@sport.uni-halle.de


Abstract

The importance of the central nervous system in endurance exercise has not yet been exhaustively investigated because of difficulties in measuring cortical parameters in sport science. During exercise there are a lot of artifacts and perturbations which can affect signal quality of cortical brain activity. The technical developments of surface electroencephalography (EEG) minimize such influences during standardized test conditions on a bicycle ergometer. The aim of this study was to investigate how movement frequency affects cortical brain activity and established physiological parameters during exercise. In cycling peak performance is affected by cadence. The analysis of brain cortical activity might lead to new insights in the relation of power and cadence. In a laboratory study sixteen male, endurance-trained cyclists completed a 60 min endurance exercise on a high-performance bicycle ergometer. Cadence was changed every 10 min (90-120-60-120-60-90 rpm). EEG was used to analyze changes in cortical brain activity. Furthermore, heart rate, blood lactate and rate of perceived exertion (RPE) were measured after each cadence change. The results indicate that heart rate, blood lactate and RPE were higher at 120 rpm compared to 60 rpm. The spectral EEG power increased statistically significantly in the alpha-2 and beta-2 frequency range by changing cadence from 60 to 120 rpm. By lowering the cadence from 120 to 60 rpm the spectral power dropped statistically significantly in all analyzed EEG frequency bands. The data also showed a statistically significant decrease of spectral EEG power in all frequency ranges over time. In conclusion, the analyzed EEG data indicate that cadence should be considered as an independent exercise normative in the training process, because it directly influences metabolic, cardiac and cortical parameters.

Keywords: Brain waves, central nervous system, constant workload, eeg, movement frequency, pedaling frequency.