• Title/Summary/Keyword: MUSCLE ACTIVITIES

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Effect of Kinesio Tape for Fascia on Trunk Muscle Activity during Plank

  • Kim, Ji Young;Park, Seol
    • The Journal of Korean Physical Therapy
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    • v.32 no.5
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    • pp.290-294
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    • 2020
  • Purpose: Many studies have reported increased muscle activities in treatments using kinesio tape. However, most studies have focused on only muscles, so the effects of kinesio tape on structures other than the muscles are unknown. The purpose of this study is to explore the effect of kinesio tape for the fascia on trunk muscle activity during plank. Methods: Eighteen healthy participants took part in this study. The participants were asked to perform the plank in two conditions: on stable surface and unstable surface. Two kinesio tapes were attached along the spiral line introduced in the anatomy train. EMG was measured in each condition. EMG data were collected before and after attaching kinesio tape in each condition. Repeated analysis of variance (repeated ANOVA) was conducted to compare EMG activities levels between conditions. Results: EMG activities levels of trunk muscles, especially rectus abdominis and erector spinae activities were significantly increased during the plank with KT on both stable and unstable surfaces. Conclusion: KT applying on the fascia of targeted muscle increases the muscle activity. Therefore, we can also focus on the fascia to increase muscle activities not only on muscles.

Clinical and Electromyographic Study of the Effects of Muscle Relaxation Appliance of Craniomandibular Disorder Patients (근이완장치가 두개하악장애환자에 미치는 영향에 대한 임상 및 근전도학적 연구)

  • Bong-Jik Shu;Myung-Yun Ko
    • Journal of Oral Medicine and Pain
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    • v.15 no.1
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    • pp.61-68
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    • 1991
  • The author studied the changes of subjective, objective symptoms and muscle activities with EM2 (myo-tronics Co., Seattle, USA) before and after MRA therapy. The 11 patients were treated with MRA and active range of motion, pain and mouth opening limitation were checked at each visit for 6-8 weeks. Electromyographic activities were measured in both anterior lobe of temporalis and middle fibers of masseter at the position in rest, clenching and mastication. The obtained results were as follows : 1. There were significant decrease in pain and mouth opening limitation and significant increase in active range of motion after MRA therapy. 2. The muscle activities tended to decrease in general, especially in the temporal and masseter muscles on clenching and in the masseter on mastication after MRA therapy. 3. There were no significant differences in muscle activities between affected and unaffected side, but there was significant differences in temporal muscle on clenching side after therapy. 4. There were no significant differences in active range of motion, pain and mouth opening limitation between acute and chronic groups. 5. There was more significant decrease in muscle activities of the affected side in acute group than those in chronic group.

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An Analysis of Muscular Activity of the Long and Short Heads of Biceps Brachii Muscle According to the Elbow Flexion Angle (위팔두갈래근의 긴갈래와 짧은갈래의 팔굽관절 굽힘 각도에 따른 근활성도 분석)

  • Kim, Jeong-Wook;Park, Min-Chull
    • PNF and Movement
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    • v.18 no.1
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    • pp.127-132
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    • 2020
  • Purpose: This study aimed to investigate the impact of resistance on the muscle activities of the long and short heads of the biceps brachii, according to the elbow angle in supination, and the difference in muscle activity between the long and the short heads. Methods: This study was conducted with 22 men in their 20s who voluntarily agreed to participate. With the glenohumeral joint neutral in a position of supination, the elbow angle was randomly moved to 0°, 30°, 60°, and 90°. Using an 8-channel surface EMG while the participants held a 2-kg. dumbbell, the muscle activities of the long and the short heads of the biceps brachii were measured. The measured data were statistically processed using SPSS for Windows 12.0. For the activities of the short and the long heads according to the angle, a one-way ANOVA was conducted, and subsequently, to check the results of an analysis of the difference between groups, an LSD post-hoc test was conducted. An independent t-test was used to compare the activities of the long head and the short head according to the angles. Results: The analysis of the impact of the load of the dumbbell at each elbow angle on the muscle activities of the long and short heads of the biceps brachii revealed significant differences in both heads (p < 0.05). The result of the post-hoc analysis showed significant differences in both heads at angles between 0° and 30°, between 0° and 60°, and between 0° and 90°. Analysis of the impact of the load of the dumbbell in supination on the muscle activities of the long and short heads showed a significant difference at the angle between 0° and 30° (p < 0.05). Conclusion: The long head of the biceps brachii mainly acts in supination; however, in supination at elbow-bending angles of 60° and 90°, there was no difference in muscle activity between the short head and the long head.

Development and Evaluation of the Neck Supporter for Preventing Neck-related MSDs

  • Kong, Yong-Ku;Han, Jun-Goo
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.2
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    • pp.297-302
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    • 2011
  • Many WMSDs(work-related-musculoskeletal disorders) have been reported in diverse industries and have also attracted much attention in recent years. Neck-related MSD is generally known as one of common WMSDs, especially it happens to workers who are working at the automobile assembly plants and/or shipyards. The awkward posture is considered as a main cause of neck-related MSDs. A neck supporter was developed to prevent neck-related MSDs, and 10 males were recruited to evaluate the newly developed neck supporter by measuring subjective discomfort ratings of whole body, shoulder, neck and neck-muscle activities. Muscle activities from four neck muscle groups(left/right sternocleidomastoid and upper/middle trapezius) were measured while simulating an automobile assembly task. Results showed that the neck supporter help to significantly improve subjective discomfort for whole-body, shoulder as well as neck body parts. The analyses of muscular activities also showed that the activities of left/right sternocleidomastoid muscles were statistically decreased with the neck supporter in this study. The muscle activities of upper/middle trapezius in case of wearing the neck supporter were not significantly different with the muscle activities in case of no-wearing the neck supporter. Overall findings verified that the neck supporter might help to prevent neck-related MSDs based on the current study.

Comparison of Lower Limb Muscle Activities by Various Angles of a Medio-lateral Ramp During Gait

  • Lee, Sang-Yeol;Ahn, Soo-Hong
    • Journal of the Korean Society of Physical Medicine
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    • v.12 no.3
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    • pp.93-98
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    • 2017
  • PURPOSE: This study investigated the activities of lower limb muscles according to the angle of a medio-lateral ramp while walking to promote awareness of the risks associated with a medio-lateral ramp. METHODS: This study was conducted on 20 healthy male adults. The muscle activities of the vastus medialis oblique (VMO), vastus lateralis oblique (VLO), tibialis anterior (TA) and peroneus longus (PL) were measured while the subjects were walking on a 3 m medio-lateral ramp. Five angles (flat, $2^{\circ}$, $5^{\circ}$, $10^{\circ}$, and $15^{\circ}$) were selected for the angle conditions of the experiment on a medio-lateral ramp. The activities were measured during the stance phase only in the middle cycle of a three-cycle walking experiment. The mean value obtained from the three walking tests was used for the analysis. RESULTS: Results showed that walking on a mediolateral ramp required more muscle activities than walking on a flat surface, through which balanced walking was achieved. CONCLUSION: Walking on a medio-lateral ramp requires proper muscle activation and control, without which the risks of injury to the joints of the lower limbs and falls are likely to increase. Therefore, special attention should be given to older people and the disabled under the condition of traversing a ramp.

Effects of Squat Exercise on Muscle Activity in Leg Muscles According to the Pressure of Hip Adduction (엉덩관절 모음 압력에 따른 스쿼트 운동이 다리 근육의 활성도에 미치는 영향)

  • Yun, Sae-bom;Bae, Chang-hwan
    • The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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    • v.26 no.1
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    • pp.47-54
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    • 2020
  • Background: This study examined the changes in the leg muscle activities of 30 healthy subjects according to different pressures caused by isometric hip adduction during squat exercise. Methods: With their knee flexed at 60°, the subjects performed isometric hip adduction with a pressure of 0, 20, 40, and 60mmHg. Surface electromyography was used to measure their muscle activities. Changes in the activities of the muscles, such as the gluteus maximus (GMAX), Gluteus medius (GM), vastus medialis oblique (VMO), vastus lateralis oblique (VLO), biceps femoris (BF), and Tensor fasciae latae (TFL) muscles, were analyzed. Results: The activities of the VMO, VLO, GM, BF, and GMAX muscles were significantly different after exercise compared to that before exercise (p<.05). The activities of all the leg muscles measured were highest at a pressure of 60mmHg during isometric hip joint adduction. Conclusion: The pressure produced by isometric hip joint adduction during squat exercise increased the leg muscle activities of the subjects. These results will provide basic data on effective squat exercise to alleviate knee joint diseases.

Effects of Active Vibration Exercise on Trunk Muscle Activity, Balance, and Activities of Daily Living in Patients with Chronic Stroke

  • Lee, Dong-Kyu;Kim, Eun-Kyung
    • The Journal of Korean Physical Therapy
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    • v.30 no.4
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    • pp.146-150
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    • 2018
  • Purpose: This study aimed to investigate the effect of active vibration exercise on trunk muscle activity, balance, and activities of daily living in patients with chronic stroke. Methods: Twenty-four patients with chronic stroke were randomly assigned to an experimental (n=12) or a control (n=12) group. The experimental group performed an active vibration exercise workout for 20 minutes a day five times a week for 4 weeks using a flexi-bar. Trunk muscle activity was measured using surface electromyography. Balance was measured using the Berg balance scale. Activities of daily living were measured using the functional independence measure. Results: The intragroup comparison showed significant differences in the rectus abdominis, internal oblique, and external oblique muscle activity values, Berg balance scale score, and functional independence measurement values in the experimental group. The intergroup comparison showed that differences in the rectus abdominis and internal oblique external oblique muscle values, Berg balance scale score, and functional independence measurement value for the experimental group were significantly related to those in the control group. Conclusion: Based on these results, this study proved that the active vibration exercise effectively improved trunk muscle activity, balance, and activities of daily living in patients with chronic stroke.

The Influence of Unstability of Supporting Surface on Trunk and Lower Extremity Muscle Activities During Bridging Exercise Combined With Core-Stabilization Exercise (중심 안정성 운동을 적용한 교각운동 시 지지면 불안정성이 체간 및 하지의 근 활성도에 미치는 영향)

  • Lee, Sim-Chul;Kim, Tack-Hoon;Cynn, Heon-Seock;Roh, Jung-Suk
    • Physical Therapy Korea
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    • v.17 no.1
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    • pp.17-25
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    • 2010
  • The aim of this study was to investigate the effect of supporting surface instability to trunk and lower extremity muscle activities during bridging exercise combined with core-stabilization exercise. Thirty young healthy adults (15 males and 15 females) voluntarily participated in this study. Each subject was asked to perform bridging exercise combined with core-stabilization exercise on three different supporting surfaces (stable ground surface, the wooden balancing board, and the air cushion). The muscle activities were measured using surface electromyography (EMG) during performing exercise. To test statistical significance, one-way ANOVA with repeated measures was used with the significance level of .05. The findings of this study are summarized as follows. (1) There were significant differences in muscle activities on internal oblique, external oblique, gluteus medius, semitendinosus, biceps femoris, medial gastrocnemius and lateral gastrocnemius during exercise (p<.05). (2) The biceps femoris and lateral gastrocnemius showed significantly higher muscle activity on the wooden balancing board rather than on the ground, and semitendinosus, biceps femoris, medial gastrocnemius and lateral gastrocnemius showed significantly higher muscle activity on the air cushion rather than on the ground (p<.05). Therefore, it is concluded that muscle activities in the trunk and the lower limbs during bridging exercise combined with core-stabilization exercise was affected with instability of supporting surface. Further researches are needed to investigate the long term effect of bridging exercise on muscle activity with patient group.

Effect of seat height of chair on muscle activity of erector spinae and rectus abdominis (의자 좌면 높이가 척추 세움근과 배곧은근의 근 활성도에 미치는 영향)

  • Lee, Won-Hwee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.7
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    • pp.476-482
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    • 2017
  • This study examined the effects of the seat height of a chair on the muscle activity of the erector spinae and rectus abdominis. Thirty healthy subjects were asked to sit on chairs at three different seat heights. The muscle activities of both the erector spinae and rectus abdominis were measured by surface electromyography. The data were analyzed by repeated one way ANOVA and the muscle activity was compared according to the seat height. The alpha level was set to 0.05. The results showed that the muscle activities of the erector spinae were not significantly different among the three seat heights. The muscle activities of the rectus abdominis were significantly different among the three seat heights. Both the rectus abdominis muscle activities were significantly greater in the low seat height than the other seat heights. These results showed that the seat height of the chair affects the muscle activities of the rectus abdominis muscle, leading to musculoskeletal pain, such as low back pain. Therefore, the seat height of a chair with a correct sitting position is important for preventing musculoskeletal pain.

Comparison of Muscle Activities in Different Supporting Surface Intervals during Push-up Exercise (팔굽혀 펴기 운동 시 지지면 간격에 따른 근 활성도 비교)

  • Oh, Hyeonseok;Kim, Jiyoung;Kim, Gyeongeun;Lee, Dahee;Yoo, Namwoo;Choi, Hojung;Park, Pyeongjin;Hwang, Hyeonsuk;Kim, Eunhye;Kang, Dongyeon;Kim, Hyoungsu
    • Journal of The Korean Society of Integrative Medicine
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    • v.1 no.4
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    • pp.25-35
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    • 2013
  • Purpose : The purpose of this study was to compare the muscle activities of infraspinatus, serratus anterior, upper trapezius, and triceps brachii in different supporting surface intervals during push-up exercise. Method : Subjects of the study were 18 healthy male students without any orthopedic or neurological injuries including neck and shoulder surgeries and can perform a push-up exercise required for the study. EMG was used to measure the muscle activities of four muscles. Result : There were statistically significant differences of all the muscles in three different supporting surface intervals(p<0.5). Muscle activity of upper trapezius was the highest(MVIC 39.40%) in the narrowest width and the lowest in the widest width. In infraspinatus, muscle activity was the highest(MVIC 36.23%) in the narrowest width and the lowest in the widest width. In serratus, muscle activity is the highest(MVIC 58.04%) in the widest width and the lowest in the narrowest width. In triceps brachii, muscle activity is the highest(MVIC 68.51%) in the widest width and the lowest in the narrowest width. Conclusion : Muscle activities are at the highest with the narrowest width in the upper trapezius and the infraspinatus. In the serratus and triceps brachii, however, muscle activities are at the highest with widest width.