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정적인 스쿼트 운동시 복합적인 하지의 자세가 가쪽넓은근과 안쪽빗넓은근의 근활성도에 미치는 영향
유원규(Yoo Won-gyu),이충휘(Yi Chung-hwi),이현주(Lee Hyun-ju) 한국전문물리치료학회 2004 한국전문물리치료학회지 Vol.11 No.3
Most exercise for Patellofemoral pain syndrome (PFPS) has focused on selectively strengthening the vastus medialis oblique muscle (VMO). Although open chain knee extension exercises are effective for in creasing overall quadriceps strength, they are not always indicated for PFPS rehabilitation. This study was designed to identify the effect of combined posture of lower extremity on Electromyographic (EMG) activity of the vastus lateralis muscle (VL) and VMO during static squat exercises. The subjects were twenty young adult males who had not experienced any knee injury and their Q-angle was within a normal range. They were asked to perform static squat exercises in five various postures using their lower extremities. The EMG activity of the VL and VMO were recorded in five exercises by surface electrodes and normalized by %MVC values derived from seated. isometric knee extensions. The normalized EMG activity levels (%MVC) of the VL and VMO for the five postures of the lower extremities were compared using one way ANOVA with repeated measures. Results of repeated measures of ANOVA’s revealed that exercise 3 and exercise 5 produced significantly greater EMG activity of VMO/VL ratios than exercise 1 (p<.05). When the static squat exercise was combined with hip adduction and toes pointed outwardly, the EMG activity of VMO/VL rates was increased. The EMG activity of VMO/VL ratio was highest during static squat exercises per formed on a decline squat. These results have important implications for progressive and selective VMO muscle strengthening exercises in PFPS patients.
AB-슬라이드를 이용한 월슬라이드 운동이 앞톱니근과 위등세모근의 근활성도에 미치는 영향
박문조(Mun-Jo Park),유원규(Won-Gyu Yoo),안덕현(Duk-Hyun An),서종길(Jong-Gil Seo),오재섭(Jae-Seop Oh) 한국임상움직임치료학회 2023 한국임상움직임치료학회지 Vol.3 No.2
Background It is known that a wall slide exercise is required to strengthen the serratus anterior. However, overactivation of the upper trapezius during wall slide exercise reduces serratus anterior mus-cle activation. Currently, methods to strengthen the serratus anterior muscle during wall slide exercise are being studied. However, there is no study that wall slide exercise using AB-SLIDE the affects upper trapezius and serratus anterior muscle. Objectives The purpose of this study is to compare the upper trapezius and serratus anterior muscle activity between general wall slide exercise and wall slide exercise using AB-SLIDE. Methods A total of 15 healthy male volunteers were recruited for this study. With and without AB-SLIDE, muscle activity of the upper trapezius and serratus anterior was compared during the wall slide exercise. The electromyographic data of the upper trapezius and serratus anterior was measured using 4D-MT, 2EM. The difference between general wall slide and wall slide using AB-SLIDE was ana-lyzed using the paired t-test with p < 0.05 as a significant level. Results Compared to the general wall slide exercise the upper trapezius muscle activation was sig-nificantly decreased when wall slide exercise using AB-SLIDE(p < 0.05). Also, serratus anterior muscle activation was significantly increased when wall slide exercise using AB-SLIDE (p < 0.05). Conclusions In this study, compared to general wall slide exercise, the upper trapezius muscle activity was significantly decreased and serratus anterior muscle activity significantly increased when using AB-SLIDE. The result of this study can confirm the wall slide exercise using AB-SLIDE will be a useful way to increase the muscle activity of the serratus anterior.
팔걸이 형태에 따른 편마비 환자의 보행 변수 및 비마비측 견갑대의 근활성도 변화
이옥경(Og-kyung Lee),안덕현(Duk-hyun An),유원규(Won-gyu Yoo),오재섭(Jae-seop Oh),윤지연(Ji-yeon Yoon) 한국전문물리치료학회 2010 한국전문물리치료학회지 Vol.17 No.3
The purpose of this study was to investigate the variations in gait pararreters in tenns of the type of ann sling used in hemiplegic patients. Ten patients with hemiplegia and ten healthy adults participated in this study and walked at self-selected speeds on a GAITRite-instn.urented carpet. The activities of the opposite shoulder girdle muscle including the latissimus dorsi, anterior deltoid, and posterior deltoid were sinmltaneously ra:orded using surface ElVIG during gait. They were randomly assigned a condition: without an ann sling, a single strap ann sling, a Harris hemi ann sling, a Rolyan hurreral cuff ann sling, and a Bobath roll ann sling. The following gait variables were analyzed: the temporo-spatial pararreters of velocity, step length, stride length, swing phase, stance phase, single SupjXlrt, step titre and toe in/toe out. The statistical analysis was one-way ANOVA with rer;eated rreasures to compare the variation of each variable. In comparison of pararreters in each trial in the hemiplegia group, the non-affa:ted side stride length, single support, and toe inltoe out resulted in statistically significantly changes (p<'C5). But without an ann sling group did not show any gait pararreter differences with ann slings. Ths study found that several ann slings varied gait patterns in patients with hemiplegia and in healthy adults. In the ElVIG analysis, the Rolyan hurreral cuff ann sling and the Bobath roll ann sling were higher muscle activity for the latissimus dorsi muscle than did the single strap ann sling. Further study should examine the problems that appeared in patients who worn ann slings by focusing on a larger number of subja: ts and by studying the variety of responses in rmre detail using an assessrrent tool that rreasures variation
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.