Abstract
Background: The aim of the study was to estimate differences in bioelectrical activity between rectus femoris (RF) and vastus medialis (VM) muscles of each lower limb. Material/Methods: 29 female and 18 male adult subjects participated in the study. Each subject performed the following quadriceps contractions with each lower limb: concentric, isometric, eccentric and 30-sec. long maximal voluntary isometric contraction. 3 parameters were obtained in surface electromyography (SEMG): mean RMS amplitude (RMS), mean percentage value of maximal voluntary contraction (%MVC) and mean frequency (MF). Results: RF occurred to have a lower percentage activity (-28.43%) and absolute amplitude (-36.57%) value than VM during all three basic forms of contraction against gravity. Except the RMS values for concentric contraction, all the mentioned parameters were significantly different. In contrast, RF had a higher MF rate than VM. Differences were at the mean level of 22.57% for all activities. Conclusions: There are no differences in SEMG of quadriceps muscle between both lower limbs. VM and RF differ from each other in RMS, %MVC and MF during all types of studied contractions.
Recommended Citation
Niespodzinski B, Lukowicz M, Mieszkowski J. Differences in bioelectrical activity of quadriceps muscle during various types of contraction. Balt J Health Phys Act. 2013; 5(3):184-190. doi: 10.2478/bjha-2013-0017
DOI
10.2478/bjha-2013-0017
Author ORCID Identifier
Bartlomiej Niespodzinski https://orcid.org/0000-0001-8992-3730; Jan Mieszkowski https://orcid.org/0000-0001-6753-5139
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Included in
Health and Physical Education Commons, Sports Medicine Commons, Sports Sciences Commons, Sports Studies Commons
