의자 좌면 높이가 척추 세움근과 근 활성도에 미치는 영향

이원휘(Won-Hwee Lee) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.7

본 연구는 의자 좌면 높이가 척추 세움근과 배곧은근의 근 활성도에 어떠한 영향을 미치는지 알아보고자 실시하였다. 건강한 남녀 30명을 대상으로 세 가지 높이의 의자 좌면에 앉게 하고 양쪽 척추 세움근과 배곧은근의 근활성도를 표면 근전도 장비를 사용하여 측정하였다. 반복측정된 일요인 분산분석을 통해 세 가지 높이의 의자 좌면에 따른 근활성도의 차이를 비교하였고 유의수준(a)은 0.05로 설정하였다. 연구 결과 의자 좌면 높이에 따라 양쪽 배곧은근의 근활성도는 유의한 차이를 보였고 양쪽 척추 세움근의 근활성도는 유의한 차이가 없었다. 양쪽 배곧은근은 낮은 높이의 의자 좌면에서 정상 높이와 높은 높이의 좌면에 비해 근활성도가 유의하게 증가하였다. 본 연구결과를 통해 앉은 자세에서 의자 좌면의 높이는 배곧은근의 근 활성도에 영향을 줄 수 있으며 배곧은근의 근활성도 증가는 요통과 같은 근골격계 통증을 일으킬 수 있으므로 근골격계 통증을 예방하기 위해 바르게 앉은 자세와 함께 의자 좌면 높이는 중요하다. 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.

주관절 굴곡근의 근피로가 힘 재현 감각에 미치는 영향

이원휘 ( Won Hwee Lee ),하성민 ( Sung Min Ha ),김용욱 ( Yong Wook Kim ),오재섭 ( Jae Seop Oh ) 한국전문물리치료학회 2007 한국전문물리치료학회지 Vol.14 No.3

슬링을 이용한 플랭크 운동 방법이 체간근육의 근활성도에 미치는 영향

이원휘(Won-Hwee Lee) 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.1

팔굽혀펴기시 지면 높이가 위팔세갈래근과 큰가슴근의 근활성도에 미치는 영향

이원휘(Won-Hwee Lee) 한국보건복지학회 2018 보건과 복지 Vol.20 No.2

본 연구는 팔굽혀펴기 운동시 지면 높이가 위팔세갈래근과 큰가슴근의 근활성도에 미치는 영향을 알아보고자 실시하였다. 22명의 건강한 남성을 대상자로 모집하여 지면 높이가 0㎝, 8㎝, 13㎝, 20㎝에서 각각 팔굽혀펴기 운동을 실시하였으며 팔굽혀펴기 동작을 시작자세, 시작자세에서 끝자세로 이동, 끝자세인 세 구간으로 나누어 각각 구간에서 표면근전도 장비를 통해 양쪽 위팔세갈래근과 큰가슴근의 근활성도를 측정하였다. 연구결과 시작자세와 시작자세에서 끝자세로 이동하는 구간에서 양쪽 위팔세갈래근과 큰가슴근의 근활성도는 지면 높이에 따라 유의한 차이가 있었지만, 끝자세 구간에서는 양쪽 위팔세갈래근은 지면높이에 따라 유의한 차이가 있었으나 큰가슴근은 유의한 차이가 없었다. 본 연구를 통해 지면의 높이가 낮을수록 양쪽 위팔세갈래근과 큰가슴근의 근활성도는 감소된다는 것을 알 수 있었고, 이 근육들은 하지마비환자들의 이동에 중요한 근육으로 팔굽혀 펴기 운동을 통한 근력 강화 운동 프로그램시 지면 높이는 운동 강도의 요소로 적용할 수 있을 것이다. The purpose of this study was to investigate the effect of surface height on muscular activity of triceps brachii and pectoralis major muscle during push-up exercise. Twenty-two healthy subjects were recruited and were asked to push-up exercise in four different surface height(0, 8, 13, and 20㎝). The push-up exercise was divided three stages which were holding in starting position, moving from starting position to final position, and holding in final position. We used surface electromyography to measure the activities of both triceps brachii and pectoralis major. We analyzed the data by using repeated one way ANOVA, the alpha level was 0.05. The results showed that the activity of triceps brachii and pectoralis major muscle is significantly different among four surface height in starting position and moving from starting position to final position. The activity of both triceps brachii is significantly different, however the activity of both pectoralis major is not significantly different holding in final position. The triceps brachii and pectoralis major muscle strength should be essential for transport in paraplegia patient. Therefore, the surface height in push-up exercises should use intensity factor of strengthen triceps brachii and pectoralis major.

장딴지근 길이가 동적 균형 및 발바닥의 앞뒤 압력 분포에 미치는 영향

이원휘(Won-Hwee Lee) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.6

본 연구의 목적은 장딴지근 길이가 동적 균형과 발의 앞뒤 압력분포에 어떤 영향을 미치는지 알아보는 것이다. 연구기간은 2018년 12월 3일부터 21일까지로 30명의 연구대상자를 장딴지근 길이 검사를 통해 장딴지근의 정상길이를 가진 대조군과 장딴지근 길이의 단축이 있는 실험군으로 분류하였다. 동적 균형과 발의 앞뒤 압력분포는 Biorescue장비를 사용하여 평가하였으며 동적 균형을 평가하기 위해 앞쪽과 뒤쪽 방향의 안정성 한계를 데이터로 수집하였다. 군간동적 균형과 발의 앞뒤 압력분포에 유의한 차이가 있는지 알아보기 위하여 독립 t 검정을 이용하여 분석하였고, 통계학적 유의수준은 0.05로 하였다. 연구 결과 군간 동적 균형과 발의 앞뒤 압력분포는 유의한 차이가 있었다(p<0.05). 이러한 연구 결과를 통해 장딴지근 길이의 단축은 앞쪽으로 동적 균형 및 발의 앞쪽 압력 분포에 영향을 미친다는 것을 제안하고 그러므로 근골격계 질환 예방과 정상적인 균형능력을 위해 장딴지근의 적절한 길이를 유지하는 것은 중요하다. The purpose of this study was investigate the effect of gastrocnemius(GCM) muscle length on the dynamic balance and antero-posterior pressure distribution of foot. Thirty subjects were recruited and each subject was classified with control experimental and control group according to GCM muscle length. The experimental group included subjects with shortness of GCM muscle length, the control group included subjects with normal length of GCM. The dynamic balance and antero-posterior pressure distribution of foot were measured by Biorescue equipment. To evaluate dynamic balance, we collected data of limit of stability in antero-posterior direction. We analyzed the data by using independent t-test. The alpha level was set 0.05. The results showed that the dynamic balance and antero-posterior pressure distribution of foot were significantly different between two groups (p<0.05). This study suggests that the shortness of GCM affects anterior limited of stability in dynamic balance and anterior pressure distribution of foot. Therefore, it is important to maintain optimal GCM muscle length for normal balance ability and prevention of musculoskeletal disease.

교각운동시 이마면에서 엉덩관절 위치가 배근육 근활성도에 미치는 영향

이원휘(Won-Hwee Lee) 한국산학기술학회 2019 한국산학기술학회논문지 Vol.20 No.3

본 연구의 목적은 이마면에서 엉덩관절 위치에 따라 배근육들의 근활성도를 측정하여 비교함으로 이마면에서 엉덩관절의 위치가 배근육들의 근활성도에 영향을 미치는지 알아보는 것이다. 연구방법은 20대의 건강한 남녀 26명을 대상으로 엉덩관절 중립, 모음, 그리고 벌림 자세에 따라 교각운동을 하였을 때 표면 근전도 장비를 이용하여 양쪽 배곧은근과 배바깥빗근, 배속빗근의 근활성도를 비교하였다. 통계 방법은 반복측정 일요인 분산분석을 실시하였고, 유의수준은 0.05로 하였다. 연구 결과 배바깥빗근과 배속빗근은 이마면에서 엉덩관절 위치에 따라 유의한 차이가 있었고, 배곧은근은 유의한 차이가 없었다. 양쪽 배바깥빗근과 왼쪽 배속빗근은 엉덩관절 중립자세보다 엉덩관절 모음 자세에서 근활성도가 유의하게 증가하였으며 오른쪽 배속빗근은 엉덩관절 벌림 자세보다 엉덩관절 모음 자세에서 근활성도가 유의하게 증가하였다. 본 연구를 통해 엉덩관절 모음 자세가 다른 자세들에 비해 안정화운동에 더욱 효과적일 수 있다는 것을 알 수 있었고, 안정화운동 프로그램을 고안할 때 운동의 강도를 조절하기 위해 이마면에서 엉덩관절의 위치에 대한 요소를 적용할 수 있을 것이다. The purpose of this study is to investigate the effect of the hip positions in frontal plane on abdominal muscle activities during bridging exercise. Twenty six subjects who have healthy conditions were asked to perform bridging exercise in three starting positions which are hip abduction, neutral and hip adduction. We used surface electromyography to compare the activities of both external oblique, internal oblique and rectus abdominis muscle. We analyzed the data by using repeated one way ANOVA, The alpha level was set at 0.05. The results showed that the muscle activities of both sides of external oblique, and internal oblique were significantly different among three starting positions. The activity of both sides of rectus abdominis were insignificantly different among three positions. The muscle activities of both sides of external oblique muscle and left internal oblique in bridging exercise with hip adduction position were significantly greater than hip neutral positions. The muscle activity of right internal oblique in bridging exercise with hip abduction positions. Our results suggest that bridging exercise with hip adduction position is recommended to lumbar stabilization exercise and the factor of hip position is important for controlling exercise intensity when designing bridging exercise program.

컴퓨터 작업시 책상과 체간사이 거리가 전방 머리 자세와 목과 어깨 근육들의 근 활성도에 미치는 영향

이원휘 ( Won Hwee Lee ) 대한물리의학회 2013 대한물리의학회지 Vol.8 No.4

PURPOSE: The purpose of this study was to investigate the effect of distance between trunk and desk on forward head posture and muscle activity of neck and shoulder muscles during computer work. METHODS: Twenty subjects who have healthy conditions were asked to perform computer work in two conditions (distance between trunk and desk was 0 and 15 cm). Forward head angle was analyzed with a SIMI motion analysis system. Surface electromyography recorded the upper trapezius and splenius capitis muscles. The significance of differences in distance between trunk and desk (0cm and 15cm) was tested by paired t-test. The alpha level was set at .05. RESULTS: The results showed that the change of forward head angle was significantly higher during the computer work when the distance between trunk and desk was 15cm than 0cm. The muscle activity of upper trapezius and splenius capitis was also significantly higher during the computer work when the distance between trunk and desk was 15cm than 0cm. CONCLUSION: Our study suggest that the distance between trunk and desk was should minimized for prevention of forward head posture during computer work.

구두 굽의 높이가 한다리 서기 자세에서 배곧은근, 척추세움근, 넙다리곧은근, 뒤넙다리근의 근활성도에 미치는 영향

이원휘(Lee, Won-Hwee),이현준(Lee, Hyun-Joon) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.3

본 연구의 목적은 젊은 여성을 대상으로 구두 굽 높이에 따라 한다리 서기 자세를 수행하는 동안 배곧은근, 척추세움근, 넙다리곧은근, 뒤넙다리근의 근활성도를 비교하기 위해 연구를 실시하였다. 본 연구는 건강한 20대 여성 20명을 대상으로 0cm, 3cm, 7cm 의 각각 다른 높이의 굽이 있는 구두를 착용하고 안정한 지지면 위에서 정적 균형검사 중 하나인 오른쪽 다리로 한다리 서기를 하는 동안 표면 근전도 장비를 이용하여 오른쪽 배곧은근, 척추세움근, 넙다리곧은근, 뒤넙다리근의 근활성도를 측정하여 비교 분석하였으며 연구 결과 척추세움근과 넙다리곧은근의 근활성도는 굽높이가 증가함에 따라 유의한 증가가 있었고(p<0.05), 배곧은근, 뒤넙다리근의 근활성도는 유의한 차이가 없었다(p>0.05). 구두 굽 높이의 증가는 척추세움근 및 넙다리곧은근의 근활성도를 증가시키며 이로 인한 허리 앞굽음과 골반의 앞쪽 기울임 증가는 신체분절의 위치나 무게 중심의 변화를 일으켜 허리 골반 부위 및 엉덩관절, 무릎관절에 근골격계 통증과 같은 문제를 일으킬 수 있을 것이다. The purpose of this study was to examine the effects of height of the shoe heel in a one leg standing posture on the muscle activity of the rectus abdominis, erector spinae, hamstring, and rectus femoris. Twenty healthy female subjects were asked to perform a one leg standing posture with three types of shoes, which had different heights of shoe heel, 0cm, 3cm, and 7cm. Surface electromyography was used to evaluate the activities of the right rectus abdominis, erector spinae, hamstring, and rectus femoris muscles. The data was analyzed by repeated one-way ANOVA and the muscle activities among three heights of shoe heel were compared. The results showed that the muscle activities of the erector spinae and rectus femoris increased significantly according to increase height of shoe heel (p<0.05). The activity of the rectus abdominis and hamstring were not significantly different among the three height of shoe heel (p>0.05). These results suggest that the height of shoe heel affects the lumbo-pelvic alignment and center of mass; therefore, high-heeled shoes lead to musculoskeletal pain in the lumbopelvic, hip, and knee areas.

견관절 외전 각도에 따른 중간 및 하부 승모근의 근 활성도 비교

이원휘 ( Won Hwee Lee ),하성민 ( Sung Min Ha ),박규남 ( Kyue Nam Park ),김수정 ( Su Jung Kim ),원종혁 ( Jong Hyuck Won ),최흥식 ( Houng Sik Choi ) 한국전문물리치료학회 2011 한국전문물리치료학회지 Vol.18 No.1

The purpose of this study was to compare electromyography (EMG) activity for the middle and lower trapezius muscle according to various shoulder abduction angles. Thirty healthy male subjects were recruited for this study. Each subject performed three repetitions of horizontal abduction at 75°, 90°, 125°, 160°, and 180° of shoulder abduction angle in a prone position. Surface EMG activity was recorded from the middle and lower trapezius while the subjects held for five seconds at a predetermined position. The EMG activity was normalized using the maximal voluntary isometric contraction (MVIC) elicited using a manual muscle testing technique. A repeatedly measured ANOVA was performed by Bonferroni`s post hoc test. The EMG activity of the middle and lower trapezius was significantly different among shoulder abduction angles (p<.05). The greatest level of muscle activity for the middle and lower trapezius were demonstrated at 90° and 160° of shoulder abduction angle, respectively. These results suggest that middle and lower trapezius strengthening exercise and manual muscle testing should be performed at different shoulder abduction angles.

어깨관절의 수동적 내회전 관절 가동범위의 측정 방법에 따른 신뢰도와 상완골두의 전방 활주 거리 비교

김현숙(Hyun-sook Kim),이원휘(Won-hwee Lee),정성대(Sung-dae Choung) 한국전문물리치료학회 2010 한국전문물리치료학회지 Vol.17 No.3

The purpose of this study was to measure intra-rater and inter-rater reliability and range of motion for measurement of passive shoulder internal rotation range of motion and to compare anterior glide dis tance of humeral head in three methods. Fifty healthy subjects and fifty patients with shoulder muscu loskeletal pain were recruited for this study. The subjects' passive shoulder internal rotation range of motion was measured by visual estimation, manual stabilization, and pressure biofeedback unit methods In two trials, measurements were perfonned on each subject by two examiners. Intraclass correlation co efficient (ICC(3,1)) was used to detennine the reliabiliη of each measurement. The intra-rater reliability of the three methods was excellent (ICC=.77~.93) in both groups. The inter-rater reliability of the 、risual estimation method was poor (ICC=.20, .29), the manual scapular stabilization method was poor and fair (ICC=.09, .50), and the pressure biofeedback unit method was excellent (ICC .86, .75) in the experimental and control groups. In the expenmental group, the difference of examined range of motion by each examiner was significant in the 、risual estimation method and manual scapular stabilization method, but there was an insignificant difference between the groups is the pressure biofeedback unit method. This result suggests that the intra-rater and inter-rater reliabiliη of a pressure biofeedback unit was better than the other methods. The difference in distance of the anterior glide of humeral head was insignificant among all the methods. The pressure biofeedback unit method was the most reliable method, so it is proposed to be a new and reliable method to measure internal rotation range of motion.