Surface electromyographic analysis in common strenghtening exercises in quadriceps and harmstring muscles among healthy subjects
Muscle weakness is one of the consequences following lower limb injuries. Strengthening exercise is a treatment prescribed by physiotherapy and other clinicias to overcome muscle weakness. There are a few strengthening exercises commonly used in rehabilitation for lower limb injuries which are stati...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Subjects: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Muscle weakness is one of the consequences following lower limb injuries. Strengthening exercise is a treatment prescribed by physiotherapy and other clinicias to overcome muscle weakness. There are a few strengthening exercises commonly used in rehabilitation for lower limb injuries which are static quadriceps exercise (SQE), inner range quadriceps (IRQ) exercise, straight leg raise (SLR) exercise, active knee extension (AKE) exercise and semisquat exercise. Vastus medialis oblique (VMO), vastus lateral is (VL) and rectus femoris (RF) are the quadriceps muscles which functions as knee extensor and influence the stability of the patella and alignment. Biceps femoris (BF) muscle is one of the hamstring muscles which functioned as knee flexor and commonly get injured than others hamstring muscles. Little information exists on the activation of the VMO, VL, BF and RF muscles during SQE, IRQ, SLR, AKE and semisquat exercise besides of the conflicting findings and varies in methodologies from the previous study. The aim of this research was to assess and compare the level of electromyographic (EMG) activity in VMO, VL, RF and BF muscles during SQE, IRQ, SLR, AKE and semisquat exercises, and to identify the exercises that will optimally activate the muscles. Fifty healthy subjects (35 females and 15 males), aged IS - 24 years (male = 21.2 ± 1.21, female 20.3 ± O.S) were recruited based on the inclusion criteria. Surface EMG electrodes were attached on the muscles. Each subject were asked to carry out all the five exercises, and Myotrac Infiniti recorded the activities of muscles. Measurement of maximal voluntary contraction (MVC) was taken for each muscle prior to the five testing exercises. Descriptive and inferential statistics were runned out using Statistical Package for the Social Sciences (SPSS) version 22.0. The normalised EMG data were analysed using repeated measure analysis of variance (ANOVA) (p 0.05) in the amount of mean %MVC signal amplitude for the muscles across the 5 exercises. The level of EMG activity in VMO (49.70±23.90) and VL (52.SS±22.21) muscles was higher during IRQ exercise than other exercises. The level of EMG activity in RF muscle was higher during IRQ (53.21±25.40) and SLR (53.17±26.51) exercises while in BF (1I.S3±14.11) muscle the level of EMG activity is higher during SQE exercise than other exercises. The finding of this study is more beneficial in the rehabilitation of patient with lower limb injuries for physiotherapy and other clinician in prescribing exercises to the patient as the exercises find out from this study giving optimum effect on the muscle. When the treatment objective is to improve the strength of VMO and VL muscles, the IRQ exercise is the preferred exercise. IRQ and SLR exercises should be the exercises of choice to improve the level of RF muscles activity. Furthermore, the SQE exercises are the most efficient exercise for activating the BF muscle. |
|---|---|
| Physical Description: | xii, 133 leaves: illustrations (some colour); 31 cm. |
| Bibliography: | Includes bibliographical references (leaves 111-126) |