Electromyographyc patterns for muscular fatigue in prolong isometric contraction
| Abstract Title: | Electromyographyc patterns for muscular fatigue in prolong isometric contraction |
| Authors: | Daniela Motoc, Francisc Schneider, Cecilia Avram, Ramona Burlacu, Sorin Talpes, N. Turtoi |
| Affiliation: | “Vasile Goldis” Western University Arad, Romania |
| Abstract text: | The aim of the study was to demonstrate the utility of spectral analysis of surface electromyography (S-EMG) and mechanomyogram (MMG), in order to evaluate and quantify the fatigue-induced changes in the electrical and mechanical properties of motor units after sustained isometric contraction. Two groups of athletes with high performances in their domains, students of Sports Faculty of UVVG participated in this study. The investigations were performed in the Clinical Physiology Laboratory, by the collective of Physiology Department. Muscular potentials were recorded and analyzed using BYOPAC MP 150 SYSTEM and the isometric hand-grip exercise was done with HAND – DYNAMOMETER TSD 121 C. Spectral analyses were performed on the EMG recorded data, including maximum amplitude of the signal, integrated EMG (iEMG), median frequency (MDF) of the power spectrum. Force of contraction was recorded on the MMG. The conclusions were consistent in validating the use of these parameters in evaluation of neuromuscular fatigue. S-EMG correlated with dynamometry gives the possibility to evaluate the physiological changes during exercise and the muscle fatigue induced changes. Taking into consideration the acquired data, S-EMG and MMG can be useful in sport activity, to guide the physical training and in work physiology and rehabilitation. |
| Keywords: | surface electromyography, mechanomyogram, sustained isometric contraction, maximum amplitude, force of contraction, integrated EMG, median frequency, muscle fatigue |
| Presentation type: | Oral |
| Correspondence: | no. 1 Feleacului St., Arad, Romania |
| Email: | motocdana2005@yahoo.com |
About The Author
