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슬링 뉴렉 기법이 교각 운동 시 몸통 근육과 넙다리뒤근육의 근 활성도에 미치는 영향
하용목(Yong-Mok Ha),오재섭(Jae-Seop Oh),안덕현(Duk-Hyun An),김미현(Mi-Hyun Kim) 한국임상움직임치료학회 2021 한국임상움직임치료학회지 Vol.1 No.1
Background : Trunk stabilization exercises activate the stabilizing muscles of the trunk and essential for the correct function of the lumbo-pelvis. The bridge exercise increases the activity of the trunk stabilizing muscle, and is also used for the treatment of these muscles. Various studies related to sling exercise have been conducted, although none of them examined its effects on the muscle activity of trunk stabilizing muscles when the bridge exercise was performed by applying the sling neurac method. Objectives : The purpose of this study was to investigate which support surface the trunk and hamstring muscles high activity during bridge exercise using sling neurac method. Methods Seven teen healthy subjects, and the surface electromyography was attached to transverse abdominis, multifidi, and the dominant side hamstring muscles. Then, the maximum voluntary isometric contraction was measured. The bridge exercise was performed on either the floor, on a foam roller, and sling surface by randomly. A one-way repeated measures ANOVA was performed to determine the difference in muscle activity between the surfaces. Results : There was a significant difference in the activity of all muscles according to the difference in the supporting surface (p < 0.05). In the transverse abdominis, the sling surface showed significantly higher than the other support surfaces (p < 0.001). Conclusions : In this study, the more unstable the support surface, the highly muscle activity in all muscles. Especially, in the sling neurac method, a significant increase in the transverse abdominis muscle activity was observed compared to the other surfaces. These results suggest that exercise on a support surface applying the sling neurac method can simultaneously induce the contraction of the trunk stabilization muscles and hamstrings. Therefore, the bridge exercise using the sling neurac method proposed in this study is an effective way to strengthen the hamstring muscles while maintaining the stability of the trunk.
전방머리자세를 가진 성인들에게 목 돌림 수행 시 시각적 생체되먹임 적용이 목의 가쪽 굽힘 움직임 패턴과 목빗근 근활성도에 미치는 영향
양노열 ( No Yul Yang ),오재섭 ( Jae Seop Oh ) 대한물리의학회 2014 대한물리의학회지 Vol.9 No.4
PURPOSE: The purpose of this study was to investigate that the differences in sternocleidomastoid muscle activity, neck rotation angle, neck lateral bending angle and neck lateral bending onset time between conditions with and without visual biofeedback during neck rotation. METHODS: Ten male and four female adults with condition of forward head posture were recruited in this study. Subjects conducted to left and right maximal neck rotation under the conditions with and without visual biofeedback. During neck rotation, kinematic data of neck rotation, neck lateral bending movement, and electromyography activities of bilateral sternocleidomastold muscles were collected. Differences in dependent variables between conditions with and without visual biofeedback were analyzed using paired t-test. RESULTS: There were significant decreases in lateral bending angle, while lateral bending movement onset time was delayed significantly when applying visual biofeedback (p<.05). However, there were no significant differences in the activation of left and right sternocleidomastoid muscles and neck rotation angle between conditions with and without visual biofeedback (p>.05). CONCLUSION: These findings suggest that visual biofeedback may be effective for axial rotation of cervical spine during neck rotation in adults with forward head posture.
등척성 엉덩관절 모음 및 벌림 시 골반 벨트가 엉덩관절 근육의 근력과 복부 근육 근 활성도에 미치는 영향
강민혁(Min-hyeok Kang),오재섭(Jae-seop Oh) 한국전문물리치료학회 2017 한국전문물리치료학회지 Vol.24 No.2
Background: To improve lumbo-pelvic stability, passive support devices (i.e., a pelvic belt) are recommended clinically. Nevertheless, to understand the influence of passive support on lumbo-pelvic stability, it is necessary to examine the influence of a pelvic belt on the abdominal and hip abductor muscles. Objects: To examine the effects of a pelvic belt on the forces of the hip adductor and abductor muscles and activity of the abdominal muscles during isometric hip adduction and abduction. Methods: This study recruited 14 healthy men. All subjects performed isometric hip adduction and abduction with and without a pelvic belt in a neutral hip position. Load cells, wrapped with a non-elastic belt, were placed above the medial and lateral malleoli of the dominant leg to measure the muscle forces of the hip adductors and abductors, respectively. The forces of the hip adductors and abductors were measured using a load cell during isometric hip adduction and abduction, while the electromyographic activities of the bilateral rectus abdominis, internal oblique, and external oblique muscles were measured. Results: The forces generated by the hip adductors and abductors were significantly greater with the pelvic belt than without (p<.05). No significant differences in abdominal muscle activities between the two conditions were found (p>.05). Conclusion: These findings suggest that use of a pelvic belt could lead to effective strengthening exercise of hip muscles in individuals with sacroiliac joint pain.
작은 무릎 굽힘 동안 시각적 바이오피드백을 이용한 엉덩이 조임이 엉덩관절 폄 근육의 근 활성도에 미치는 영향
오아름(Ah-Reum Oh),오재섭(Jae-Seop Oh),유원규(Won-Gyu Yoo),안덕현(Duk-Hyun An),조원녕(Won-Nyeong Cho) 한국임상움직임치료학회 2021 한국임상움직임치료학회지 Vol.1 No.1
Background : In recent studies on back pain control, various exercises for strengthening the gluteus maximus have been suggested, however most of them imply load bearing exercise or giving resistance. Small knee bending is a movement evaluation that is frequently used in clinical practice and provides basic data for therapeutic intervention. It is also introduced as a safe way to exercise without applying a large load. Objectives : This study was conducted to investigate how the hip squeeze exercise using a tension sensor affects the muscle activity of the hip joint extension muscle during small knee bending. Methods : In this study, 30 subjects without back pain conducted to two conditions, with and without real-time visual biofeedback for small knee flexion. The hip squeeze force was measured using a tension sensor, and this was confirmed by real-time visual biofeedback. The muscle activities of hip extensors acting on the extension of the hip joint were measured by superficial EMG. To compare the difference in muscle activity under the two conditions, it was analyzed using a paired t-test. Results : As a result, the hip extensor muscle (gluteus maximus, both erector spinae) activity (maximum voluntary isometric contraction, %MVIC) significantly increased (p < 0.05) when real-time visual biofeedback using a tension sensor was applied compared to when it was not applied. Conclusions : Our study confirms that even a low-intensity exercise, such as a small knee flexion, can increase selective muscle activity if appropriate visual biofeedback is applied. In addition, the proposed hip squeezing method using a tension sensor induces selective muscle activity in a low-intensity exercise, which renders this method appropriate for subjects who do not exercise with great force, such as the elderly or women.
건강한 성인의 몸통 앞쪽 굽힘 시 시각적 생체 되먹임을 이용한 볼기근 조임 운동이 척추세움근의 근 활성도와 허리뼈 및 엉덩관절의 움직임 패턴에 미치는 효과
김동휘(Dong-Hwi Kim),오재섭(Jae-Seop Oh),김미현(Mi-Hyun Kim),안덕현(Duk-Hyun An),손정호(Jung-Ho Son) 한국임상움직임치료학회 2021 한국임상움직임치료학회지 Vol.1 No.1
Background : Trunk forward bending is common in everyday life but can cause mechanical stress on the lumbar spine and cause low back pain if performed in the wrong way. Mechanical stress occurs in the lumbar spine during forward bending because of incorrect movement of the lumbar spine or hyperactivation of the erector spinae muscle. Therapeutic exercise using various auxiliary devices is necessary to reduce such stress. Objectives : The purpose of this study is to determine how visual biofeedback gluteus squeeze exercise affects the movement in the lumbar spine and the muscle activity of the erector spinae during forward bending. Methods : In this study, 25 healthy adults were selected as the subjects. During forward bending, each subject identified the information of visual biofeedback by linking a belt with a tension sensor to a mobile phone and then performing the exercise with the gluteal muscle as much as possible. The movement of the lumbar spine in forward bending before and after the performance of the exercise was compared with the muscle activity of the erector spinae to identify the effect of the visual biofeedback gluteus squeeze exercise. Results : Findings showed that the angle of the lumbar flexion was significantly higher during the forward bending performed after the visual biofeedback gluteus squeeze exercise than that without the visual biofeedback gluteus squeeze exercise. Moreover, the muscle activity of the erector spinae decreased significantly when the visual biofeedback gluteus squeeze exercise was not applied when the motion was performed in forward bending. Conclusions The results of this study confirm that the visual biofeedback gluteus squeeze exercise effectively reduces the muscle activity of the erector spinae and improves the movement of the lumbar spine during forward bending in healthy adults.
레이저빔을 이용한 시각적 생체 되먹임이 전방 런지운동 시 안쪽넓은근과 가쪽넓 은근의 근 활성도에 미치는 영향
공치완(Chi-Wan Kong),오재섭(Jae-Seop Oh),김미현(Mi-Hyun Kim),안덕현(Duk-Hyun An),성진욱(Jin-Wook Sung) 한국임상움직임치료학회 2021 한국임상움직임치료학회지 Vol.1 No.1
Background : Knee pain is a common musculoskeletal concern that inconveniences daily life. A recent study revealed that knee pain occurs mainly when the knees are not aligned correctly during weight load training. Certain visual biofeedback methods enable the strengthening of the vastus medialis (VMO) muscle, whose activity keeps the lower limb in neutral alignment. However, the visual biofeedback devices in most studies are hard to use, and only a few have suggested methods for selective VMO strengthening using laser equipment during weight-bearing tasks. Objectives : The purpose of this study was to measure the electromyographic VMO and vastus lateralis (VL) activity during forward lunge with and without biofeedback. Methods : Twenty subjects with a healthy participated in this study. VMO and VL activity between forward lunges with and without visual biofeedback using a laser beam was compared. The VMO, VL, and VMO/VL muscle activity ratios with and without visual biofeedback were analyzed using paired t-tests with p < 0.05 as the significance level. Results : The VMO muscle activity was significantly higher (p = 0.020) during the forward lunge with visual biofeedback than that in the forward lunge without feedback. The VL muscle activity was decreased but not significantly (p < 0.05). The VMO/VL muscle activity ratio was significantly higher (p < 0.05) during the forward lunge with visual biofeedback than that in the forward lunge without biofeedback. Conclusions : In this study, there were significant increases in VMO muscle activity and VMO/VL muscle activity ratio with biofeedback. The results show that the use of laser equipment for visual biofeedback can affect selective muscle activation, and the visual biofeedback equipment can be useful in treatment or development of protocols for the performance of weight-bearing exercises or exercises intended to prevent knee injury.