• 디지털융복합연구
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• 제10권9호
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• pp.435-441
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• 2012

본 연구는 정상 성인을 대상으로 광범위한 어깨관절 각도의 팔자세 유형에서 여러 가지 손의 쥐기 강도의 차이에 따라 어깨주위근 활성도를 측정하여, 직업과 관련된 어깨 손상을 예방하고 치료하는데 유용한 기초임상자료로 제공하고자 한다. 팔자세의 유형에 따라 다양한 강도로 쥐기를 시행 할 때 어깨 주위 근육의 활성도를 알아보기 위해 모든 대상자들은 MVC를 측정하였고 동일한 자세에서 어깨관절 $0^{\circ}$, $90^{\circ}$, $160^{\circ}$에서 각각 최대 쥐기 강도의 30%, 50%, 70%를 무작위로 실시하여 팔자세의 유형에서 쥐기강도에 따른 앞세모근, 가시위근, 위등세모근, 가시아래근의 %MVC를 구하여 어깨근 활성도를 알아보았다. 팔자세의 유형에 따른 각 집단의 %MVC를 비교하기 위하여 $0^{\circ}$에서 최대 힘의 30%, 50%, 70%로 쥐기를 비교한 결과 앞세모근, 가시위근, 위등세모근, 가시아래근 간의 근활성도에서는 유의한 차이가 나타나지 않았으나, $90^{\circ}$와 $160^{\circ}$에서는 앞세모근, 가시위근, 위등세모근, 가시아래근에서 유의한 차이가 나타났으며(p<.001). 사후검정결과 모든 각도에서 앞세모근과 가시아래근의 근활성도가 높게 나타났으며, 위등세모근의 근활성도는 가장 낮게 나타났다. 다양한 산업현장의 근로 여건 등을 고려하여 과도한 손의 움직임은 안정성과 가동성에 기여를 하는 어깨주위 근육들에 손상을 초래할 수 있다. 본 연구에서는 특히 가시아래근의 경우 팔의 각도가 클수록 그리고 쥐기 힘이 커질수록 근활성도가 증가 하는 양상을 보였다. 이러한 양상은 머리위로 손을 올려 사용하는 작업현장에서의 어깨손상예방과 손상된 근육을 선택적으로 재활하는 측면에서 기초 임상 자료로 활용 될 수 있을 것이다.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5689-5697
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• 2013

본 연구는 뇌졸중으로 인한 아급성 편마비 환자의 견관절 거상 시 scapular taping 적용이 견갑골 상방 회전근과 전 삼각근의 근 활성도와 통증, 관절가동범위, 그리고 고유수용성감각에 미치는 영향을 알아보기 위하여 실시하였다. 28명을 대상으로 실험군과 대조군으로 나눠 테이핑 전과 후의 상승모근, 하승모근, 전거근 그리고 전 삼각근의 근 활성도를 측정하였다. 그리고 견관절 관절가동범위와 통증, 고유수용성 감각을 측정하였다. 실험결과 근 활성도는 하승모근과 전거근에서 scapular taping 적용 시 유의하게 증가하였으며(p<0.05), 관절가동범위는 유의한 차이가 있었다(p<0.05). 그러나 통증과 고유수용성 감각은 유의한 차이가 없었다(p>0.05). 본 연구 결과 견관절을 거상하는 동안 아급성편마비 환자들에게 적용한 scapular taping은 견갑골 상방회전근의 근 활성도를 증가시키고 관절가동범위를 증가시키는데 부가적인 치료 방법으로 활용될 수 있을 것이다.

• 한국전문물리치료학회지
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• 제14권2호
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• pp.44-52
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• 2007

This study was carried out to compare the muscle activities of the shoulder stabilizers between persons with and without winging scapular during push-up plus exercise (adds the scapular protraction to the general push-up exercise). For this study, eleven males with winging scapular and eleven healthy males were recruited. Surface electromyographic (EMG) activity was recorded from the serratus anterior, upper trapezius, lower trapezius, infraspinatus, and pectoralis major while the subjects performed the push-up plus. Each push-up plus was subdivided into three phases according to the elbow position which was measured using the 3-D motion analysis system: elbow flexion (EF), elbow extension (EE), and shoulder protraction phases (SP). Two-way repeated measure ANOVA (phase ${\times}$ group) were used for statistical analysis. There was significant phase by group interaction only on the EMG composition ratio of the serratus anterior (p>.05). The EMG composition ratio of the serratus anterior was significantly higher in SP than in either EF or EE however, it was not different between winging scapular and normal groups. For both groups, the EMG composition ratio of upper trapezius, lower trapezius, and pectoralis major was significantly different across the phases of push-up plus, but the infraspinatus EMG composition ratio was not. For both groups, in EF and EE phases, the EMG composition ratio of both pectoralis major and serratus anterior were relatively higher than that of other muscles. However, in both groups, the EMG composition ratio of the serratus anterior became much more predominant than that of the pectoralis major. In addition, infraspinatus activated greater than pectoralis major. These results showed that the push-up plus exercise is effective to selectively strengthen the serratus anterior for both individuals with and without winging scapular, but not equally effective for other shoulder stabilizers.

• 대한통합의학회지
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• 제7권2호
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• pp.133-139
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• 2019

Purpose : This study aims to investigate the rating of perceived exertion (RPE) and muscle activity of the inspiratory primary and accessory muscle during breathing exercise with different air hole diameters of the inspiratory muscle trainer (IMT). Methods : The Borg's scale and surface electromyography (EMG) was used to collect data of the RPE and muscle activity of the inspiratory primary the external intercostal (EI) and diaphragm (DIA) and accessory muscles anterior scalene (AS), sternocleidomastoid (SCM), pectoralis major (PM), and upper trapezius (UT) muscles during breathing exercise with different air hole diameters (6 mm, 4 mm, and 2 mm) of the IMT in healthy young male subjects. Results : The RPE and muscle activities of the AS, SCM, and UT are increased significantly in accordance to the decreasing diameter of air hole of air tip in IMT. However, there are no differences in the muscle activities of the PM, EI, and DIA based on differences of diameters of air hole of air tip in IMT. Conclusion : The smaller the diametr of IMT air-hole, RPE and muscle activities of AS, SCM and UT were increased. Therefore, further study would be necessary to investigate the proper intensity and relaxation posture for the exercise protocol to strengthen the inspiratory primary muscles.

• 융합정보논문지
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• 제7권4호
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• pp.97-103
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• 2017

본 연구의 목적은 앉은 자세에서 골반의 앞방향경사와 뒷방향경사에 따른 스마트폰의 사용이 목세움근과 위등세모근의 근활성도를 알아보고 IoT 디바이스 개발에 필요한 기초자료를 얻고자 하였다. 건강한 20-30대 성인남녀 15명을 대상으로 앉은 자세에서 골반앞방향경사와 골반뒷방향경사를 중재한 뒤 5분간 스마트폰을 사용하여 근전도 신호를 측정하고 중앙 3분의 근전도 신호를 사용하였다. 연구결과 앉은 자세에서 골반앞방향경사의 스마트폰 사용이 골반뒤방향경사와 비교하여 양측 목세움근(p<.001), 왼쪽 위등세모근(p<.001), 오른쪽 위등세모근(p<.002)의 %RVC 값이 유의하게 낮았다. 이는 골반의 앞방향경사를 통한 앉은 자세가 척추의 정상적인 만곡을 유지하여 스마트폰 사용 시 발생하게 되는 전방머리자세를 방지하여 목과 어깨 주변의 부하를 감소시켜 %RVC 값이 유의하게 낮았다고 사료되며 향후 골반경사에 중점을 둔 새로운 자세교정 IoT 디바이스들이 개발되어야할 것이다.

• 한국전문물리치료학회지
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• 제25권4호
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• pp.1-8
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• 2018

Background: Round shoulder posture, results from excessive flexed posture of the thorax, is defined as a position of scapular protraction, anterior tipping, and downward rotation. However, previous studies have focused on only passive position of the thorax during scapular posterior tilting (SPT) and have not reported on SPT combined with correction of flexed posture. Objects: The aim of this study was to compare effects of SPT and SPT with prone trunk extension (SPT + PTE) on activities of the lower trapezius, serratus anterior, and thoracic erector spinae and degree of posture in subjects with round shoulder and flexed posture. Methods: Fifteen subjects with round shoulder and flexed posture were recruited. The caliper was used to measure the degree of round shoulder and flexed posture. Electromyography was performed to collect data of muscle activities. Paired t-test was used to compare two exercise (${\alpha}=.05$). Results: When SPT + PTE was applied, the degree of round shoulder posture (p=.001) and flexed posture (p=.039) significantly decreased compared with that when SPT was applied. The lower trapezius activity significantly increased in the SPT + PTE condition compared with that in the SPT condition (p=.026). There were no significant differences in serratus anterior activity between SPT + PTE and SPT. The thoracic erector spinae activity significantly increased in the SPT + PTE condition compared with that in the SPT condition (p=.014). Conclusion: SPT + PTE might be one of the effective methods to enhance activities of lower trapezius and thoracic erector spinae, and to reduce round shoulder posture and flexed posture in subjects with round shoulder and flexed posture.

• 한국전문물리치료학회지
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• 제19권4호
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• pp.38-45
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• 2012

The aim of this study is to compare the effect of abdominal drawing-in maneuver (ADIM) on lower trapezius (LT), serratus anterior (SA), and erector spinae (ES) muscle activity during arm lifts in prone and standing positions. Twenty healthy subjects were recruited, and NoraxonTeleMyo 2400T was used to collect electromyographic signals from the LT, SA, and ES muscles. A two-way repeated analysis of variance (ANOVA) used a significance level of .05. If a significant interaction was found, pairwise comparisons were performed with a Bonferroni adjustment (.05/4=.013). The results of the study were as follows: 1) In LT, no significant ADIM by position interaction was found ($F_{1,19}$=.356, p=.558). There was a significant main effect for ADIM. LT muscle activity with ADIM was significantly greater compared with muscle activity without ADIM ($F_{1,19}$=82.863, p<.001). There was also a significant main effect for position. LT muscle activity in the prone position was greater compared with muscle activity in the standing position ($F_{1,19}$=116.401, p<.001). 2) In SA, significant ADIM by position interaction was found ($F_{1,19}$=8.687, p=.008). There were significant differences in all pairwise comparisons. The greatest SA muscle activity was observed in the standing position with ADIM. 3) In ES, significant ADIM by position interaction was found ($F_{1,19}$=122.473, p<.001). The lowest ES muscle activity was elicited in the standing position with ADIM. Based on these results, ADIM is advocated in the prone position to increase LT muscle activity. In addition, it is concluded that arm lifts in the standing position with ADIM offer the most favorable combination for reducing ES muscle activity and increasing SA muscle activity.

• 디지털융복합연구
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• 제19권6호
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• pp.265-271
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• 2021

본 연구는 경추성 두통 환자의 진단 기준을 정립하고, 임상평가와 운동치료 시 효율적 방법 제공을 목적으로 경추성 두통환자들을 15명을 실험군으로 건강한 대상자 15명을 대조군으로 설정하여 그룹 간, 근육의 특성과 자세, 근활성도를 비교 분석하고, 실험군의 각 변수들 간 상관관계를 분석하였다. 연구결과 뒤통수밑근 경도와 위등세모근의 긴장도, 경도에서 통계적으로 유의한 차이를 보였다p<.001). 자세 변화 비교에서는 목 기울기 각도와 첫 번째 등뼈 경사각이 통계적으로 유의한 차이를 보였으며p<.05), 목빗근의 근활성도 변화 비교에서도 통계적으로 유의한 차이를 보였다(p<.001). 실험군에서 근육의 특성, 자세, 목빗근의 근활성도 간 상관관계를 분석한 결과, 뒤통수밑근의 긴장도가 증가할수록 뒤통수밑근의 경도가 증가함을 나타내 양의 상관관계를 보였고(p<.001), 위등세모근의 긴장도가 증가할수록 위등세모근의 경도도 증가하여 양의 상관관계를 보였다(p<.001). 경추성 두통환자의 평가와 치료 시 본 연구의 결과를 참고한다면, 보다 효율적으로 접근할 수 있을 것으로 기대된다. 향후 연구를 발전시켜 더 많은 연구대상자들을 평가하고 차이를 비교하는 연구와 다양한 직업군을 대상으로 하는 연구들이 필요할 것으로 생각된다.

• 한국운동역학회지
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• 제24권1호
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• pp.11-18
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• 2014

The purposes of this study were to analyze the kinematics and electromyographic variables of the upper extremity for the backhand clear motion according to the type of hitting in badminton. Seven elite male university players were selected as the subjects. Four digital video cameras and Noraxon Telemyo 2400 were used to collect the 3D kinematics and electromyographic data. The results were as follows: 1) in the phase of impact, the time of motion for the overhead backhand clear was the longest, 2) in the event of impact, the distance of step toward X direction was the longest and the distance of step toward Y direction was the shortest for the overhead backhand clear, 3) in the event of backswing, the rotation angles of shoulder and pelvis and the flexion angle of shoulder for the overhead backhand clear were the biggest, 4) the maximum flexion angular velocity of shoulder and the maximum extension angular velocity of elbow for the overhead backhand clear were the biggest, and 5) in the phase of impact, mean EMG of the wrist flexor, triceps, and trapezius muscle for the overhead backhand clear was bigger than that for the underhand stroke and in the phase of follow-through, mean EMG of the wrist flexor and extensor, biceps, triceps, and trapezius muscle for the overhead backhand clear was the biggest.

• 대한통합의학회지
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• 제5권3호
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• pp.21-28
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• 2017

Purpose: The purpose of this study was to investigate the effects of three exercise programs on forward head posture. Methods: Ninety-five individuals were recruited to assess the of the pectoralis minor muscle. Of these, 36 individuals with pectoralis minor muscles were selected and randomly divided into three groups: a functional massage group, a stretching group, and a stretching and muscle strengthening group. The exercise program consisted of sessions four times per week for two weeks. The length of pectoralis minor and the activity of the trapezius muscles were measured using electromyography. Forward head posture was assessed using the craniovertebral angle (CVA) and the cranial rotation angle (CRA) pre-, during and post-treatment. Result: Significant improvements were observed in pectoralis minor length, CRA, and CVA post-treatment in all groups (p<0.05, p<0.01, p<0.001). However, only the activity of the lower trapezius demonstrated a statistically significant difference post-treatment. There were no significant differences between the groups. Conclusion: The findings of this study suggest that all three exercise programs were effective in improving forward head posture and the length of pectoralis minor post-treatment.