EMG activity of the vastus medialis oblique and vastus lateralis muscles during repeated isokinetics contractions
3
Issued Date
2010
Copyright Date
2010
Resource Type
Language
eng
File Type
application/pdf
No. of Pages/File Size
x, 73 leaves : ill. (some col.)
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Mahidol University
Bibliographic Citation
Thesis (M.Sc. (Sports Science))--Mahidol University, 2010
Suggested Citation
Jitlada Tantithavorn EMG activity of the vastus medialis oblique and vastus lateralis muscles during repeated isokinetics contractions. Thesis (M.Sc. (Sports Science))--Mahidol University, 2010. Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/95387
Title
EMG activity of the vastus medialis oblique and vastus lateralis muscles during repeated isokinetics contractions
Alternative Title(s)
อัตราส่วนปริมาณคลื่นไฟฟ้าของกล้ามเนื้อวาสตัส มีเดียลลิส ออบลีคและวาสตัส แลท เทอรัลลิสขณะหดตัวซ้ำแบบไอโสไคเนติก
Author(s)
Abstract
The purpose of this study was to determine the effects of repeated isokinetic contraction on the EMG activities and onset timing response of the vastus medialis oblique (VMO) and vastus lateralis (VL) muscles during selected functional activities between athletes and a non-athletes group. Forty healthy males, who had no lower musculoskeletal injuries and pain,volunteered for the study. All subjects performed repeated isokinetics concentric contractions against the velocity of 60s -1until the knee extension torque decreased to 50 % of peak torque. Three functional activities: stair stepping (SS), bilateral squat (BS), and unilateral squat (US) were performed after repeated isokinetics contractions while EMG activities of the VMO and VL muscles of the subject's dominant leg were recorded. A 2x2x3 mixed model ANOVA (2 times x 2 groups x 3 activities) revealed statistically significant difference normalized VMO and VL EMG between pre-test and post-test. Similar to EMG amplitude, there was significant difference of VMO and VL onset timing between pre-test and post-test. Moreover, for VL onset timing, two main effects (time x activities and time x group) were significantly different. In conclusion, the results of the study showed that VMO and VL activities and onset times during the selected functional activities were affected by repeated isokinetics contraction which may alter patella tracking pattern
Description
Sports Science (Mahidol University 2010)
Degree Name
Master of Science
Degree Level
Master's degree
Degree Department
College of Sports Science and Technology
Degree Discipline
Sports Science
Degree Grantor(s)
Mahidol University