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Lee, Dong-Yeop
- A Study on the Selective Strengthening Exercise of the Quadriceps Muscle According to Various Squat Types
Authors
1 Department of Physical Therapy, Sun Moon University, Asan-si, Chungnam, KP
Source
Medico-Legal Update, Vol 20, No 1 (2020), Pagination: 1857-1862Abstract
Background/Objectives: The purpose of this study was to identify the highest activation in Vastus Medialis (VMO), Vastus Lateralis (VL) and Rectus Femoris (RF) while performing various squat exercises to create an effective exercising method.
Method/Statistical Analysis:40 healthy subjects (males 23, females 17) from S University were recruited. Subjects performed four different types of squats; General Squats (GS), Instability Squats on an unstable surface (IS), Knee Adduction Squats (KAS), and Wall squats (WS). The difference in the activation of VMO, VLO and RF were recorded during the various exercises were analyzed and recorded with the EMG.
Findings: Measurements of all the experiments were analyzed using one-way ANOVA. Within these results, RF showed the most activation during (WS) and the least activation during (KAS). However, there were no significant differences found between (GS) and (IS). VLO showed the most activation during (GS). On the other hand, there were no significant differences found within (IS) and (WS). In addition to our results, VMO showed the least activation during (KAS). All three muscles displayed different activation patterns during each squat exercise.
Improvements/Applications: Considering these findings, this study may help to design a more effective exercise for specific muscles when strengthening the leg muscles.
Keywords
Weight Bearing Exercise, Various Squat, Base of Support, Muscle Activity, Selective Quadriceps.
- Change of Serratus Anterior Muscle Thickness According to Knee Flexion Angle During Knee-Push Up Plus Exercise on Sling
Authors
1 Department of Physical Therapy, Sun Moon University, Asan-si, Chungnam, KP
Source
Medico-Legal Update, Vol 20, No 1 (2020), Pagination: 1863-1868Abstract
Background/Objectives: The purpose of this study is to compare the change of thickness of serratus anterior muscle to different angles of knee flexion when knee push up plus (KPP) exercise is conducting on an unstable surface (sling).
Method/Statistical Analysis: There were 30 healthy young male and female students randomly selected and divided into 3 different groups along different knee flexion angles on an unstable surface (sling). The three groups of ten did KPP exercises on the sling. The muscle was measured before and after the exercise.
Findings: All three groups showed some changes in the thickness of the muscle. The group with the biggest change was the 60° knee flexion, followed by 75° and 90° groups.
Improvements/Applications: Based on the results, all experimental groups showed some differences with KPP exercise conducted on an unstable surface (sling) and especially the group with the lowest angle had the most effect. Therefore, it is concerned that a lower knee flexion angle can be more effective on the KPP exercise.
Keywords
Serratus Anterior Muscle, Push Up Plus Exercise, Unstable Support Surface, Knee Flexion Angle, Thickness Change, Ultrasonography.- The Study of Swedish Massage on Anxiety Situation and PPT in Stressed Office Workers
Authors
1 Dept. of Physical Therapy, Sun Moon University, KP
2 Dept. of Physical Therapy, Kunjang University College, KP
Source
Medico-Legal Update, Vol 20, No 1 (2020), Pagination: 2037-2041Abstract
Background: The purpose of this study was to investigate the effects of Swedish massage on anxiety and pressure pain threshold in office workers with psychological stress.
Method: Sixty office workers with psychological stress were randomly assigned to experimental group 1 and control group. They were assigned into either a Swedish massage group (Experimental group 1, n = 30) or a resting group (Control group, n = 30). A single measurement mediated Swedish massage and rest for 20 minutes and was measured before and after intervention.
Findings: In state trait anxiety inventory (STAI), there were significant differences between before and after the experiment and between the two groups (p<.05). The pressure pain threshold (PPT) of the upper trapezius increased in the Swedish massage group (p<.05).
Application: These findings indicate that, the Swedish massage applied to stressed office workers showed a significant difference in increase of PPT and decrease of STAI.