|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|
De Vito, Giuseppe
|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. https://doi.org/10.1016/j.jelekin.2007.06.012|
|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|
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