Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/1249
Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Effects of repeated ankle plantar-flexions on H-reflex and body sway during standing
Authors: Laudani, Luka
Wood, Leslie
Casabona, Antonino
Giuffrida, Rosario
De, Vito Giuseppe
Contact Email: giuseppe.devito@stir.ac.uk
Keywords: Dynamic contractions
Stretch reflex
Post-exercise potentiation
Stance
Issue Date: Feb-2009
Publisher: Elsevier / International Society of Electrophysiology and Kinesiology (ISEK)
Citation: Laudani L, Wood L, Casabona A, Giuffrida R & De Vito G (2009) Effects of repeated ankle plantar-flexions on H-reflex and body sway during standing, Journal of Electromyography and Kinesiology, 19 (1), pp. 85-92.
Abstract: The study investigated relations between effects of repeated ankle plantar-flexion movements exercise on the soleus Hoffmann (H) reflex and on postural body sway when maintaining upright stance. Ten young volunteers performed five sets of ankle plantar-flexions of both lower limbs. Assessment of the feet centre-of-pressure (COP) displacement and H-reflex tests were carried out in quiet stance before, during and after the exercise. H-max and M-max responses were obtained in 8 subjects and reported as the peak-to-peak amplitudes of the right soleus muscle electromyographic waves. Mean dispersion of COP along the antero-posterior direction increased significantly during the exercise; whilst the overall H-reflex response indicated a reduction without a concomitant modification in the M-max response. H-reflex responses, however, varied between participants during the first sets of exercise, showing two main trends of modulation: either depression or early facilitation followed by reduction of the H-reflex amplitude. The extent of reflex modulation in standing position was correlated to the concentric work performed during the exercise (r=0.85; p < 0.01), but not to the antero-posterior COP dispersion. These results suggest that during a repeated ankle plantar-flexions exercise, modulation of the H-reflex measured in upright stance differs across individuals and is not related to changes of postural sway.
Type: Journal Article
URI: http://hdl.handle.net/1893/1249
DOI Link: http://dx.doi.org/10.1016/j.jelekin.2007.06.012
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Strathclyde
Glasgow Caledonian University
Università degli Studi di Catania
Università degli Studi di Catania
Sport

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