• The Journal of Korean Physical Therapy
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• 제11권3호
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• pp.13-21
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• 1999

Active movement is able to actively contract his muscles and move a segment either with or without assistance. This movement maintain physiologic elasticity and contractility of the participating muscles, provide sensory feedback from the contracting muscles and stimulus for bone integrity as well as increase circulation and prevent thrombus formation, in addition to develop coordination and moor skills for functional activities. Passive movement is the motion to the external force; gravity, machine, another individuals. Active movement is more activated rather than passived on the central nervous system. Therefore, we think that active movement is more effected facilitating through specific inhibitory mobilization of muscle.

• The Journal of Korean Physical Therapy
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• 제12권2호
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• pp.267-273
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• 2000

The 30 percent or more women who have urinary incontinence have some problem in contraction of perineal muscles. In fact. to increase the strength of perineal muscles, voluntary muscle contraction is more effective than electrical contraction. Electrical stimulation or bio feedback therapy is safe and effective therapy for Patients who have complex urinary incontinence. because these therapies can solve the problems of the voluntary perineal muscle contraction these therapies can help women to know to contract the perineal muscles effectively. The combined therapy ie. Electrical stimulation and bio feedback therapy with pelvic muscle training program or bladder drill can be considered as good treatment method. Pelvic floor muscle exercise is importance to make patient itself participate by making to be interested about exercise and by tacking motivations at therapy to themselves.

• 한방재활의학과학회지
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• 제18권4호
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• pp.203-215
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• 2008

Objectives : The purpose of this study was to investigate abdominal muscles in chronic low back pain patients by meridian-electromyograph. Methods : Sample group of 11 with from low back pain during three months and control group of 10 subjects without low back pain have been recruited. Outcomes were assessed using meridian-electromyograph, visual analogue scale, and oswestry disability index. Results : Contraction power of external oblique abdominalis in control group was significantly higher than sample group, but there was no significant difference in muscle fatigue. Conclusions : According to above results, there are correlations between abdominal muscles and low back pain.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2789-2791
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• 2003

Today, many people are sitting on chair in their life. If a sitting posture is not correct, there is some trouble with the waist. And if it goes on long time, sometimes it cause the hurts of waist or the deformded spinal column. A crouched posture is an obstacle to breath and it give rise to drowsiness because the lack of oxygen. Sitting posture is a habit so people can't feel it oneself and look over some kind of risks. It analyzes a condition of muscles by measuring EMG of spinal both side of spin al-bones. It can have a right sitting posture by the analyzing that increasing of muscles tention in one or the other side of muscles when the posture inclines on one side or ahead.

• 한국운동역학회지
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• 제13권2호
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• pp.1-12
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• 2003

This study was performed to provide normative isokinetic strength of knee muscles of middle school non-athletic and athletic populations for rehabilitation and pre-season screening for injury prevention. Seven non-athletic subjects and 8 hockey players participated in this investigation. Each subject was tested at speeds of $60^{\circ}/sec$, $180^{\circ}/sec$, and $300^{\circ}/sec$. The free weight of lower leg was measured at speed of $60^{\circ}/sec$ to take gravity effect Into consideration when peak torque of knee muscles occurred. The results showed that the relative peak torque production of knee flexors did not change but the relative peak torque of knee extensors decreased significantly. Mamstring/quadriceps ratios increased mainly due to significant decreases in knee extensors torque production. No significant differences were found between groups. The hamstring/quadriceps ratios for both groups were significantly lower when the gravity effect was not eliminated.

• Journal of Oral Medicine and Pain
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• 제47권2호
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• pp.95-101
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• 2022

Temporomandibular joint osteoarthritis (TMJ OA) causes destruction of the temporomandibular joint (TMJ) and can lead to occlusal changes such as anterior open bite in some patients. Consequently, these patients may experience difficulty in chewing food items and exhibit abnormal functional habits such as bruxism, preventing healing of the TMJ condyles. Treatment protocols include the use of traction appliances to reduce stress on the condyles. Unstable occlusions can lead to weakness of the masticatory muscles which, in turn, worsen the occlusal changes and complicate pain management. Therefore, the current study evaluated the condition of the masseter muscle using ultrasonography and educated patients on the execution of gum-chewing exercises for muscle strengthening. It also aimed to assess the effects of traction appliances and strengthening exercises on the masticatory muscles of patients with occlusal changes caused by TMJ OA.

• 한국축산식품학회지
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• 제34권5호
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• pp.674-682
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• 2014

The objective of this study was to investigate the physico-chemical and sensory properties of loin (m. longissimus dorsi) and top round (m. semimembranosus) beef from 3-, 6-, 9-, and 12 mon-old Holstein calves. For both loin and top round muscles, the moisture contents were decreased, whereas the protein and fat contents were increased, as the slaughtering age increased. In terms of meat color, for both muscle types, CIE $L^*$ values were decreased, whereas CIE $a^*$ values and myoglobin content increased as the slaughtering age increased. pH values were significantly higher in the 3 mon-old group than in the other groups. The Warner-Bratzler shear force (WBSF) values were lowest for loin muscles from the 12 mon-old group; however, there was no significant difference for top round muscle among the 4 age groups. Cooking loss for both loin and top round muscles were significantly higher for the 3 mon-old group than for the other groups. The water holding capacity (WHC) of both muscles were highest for the 12 mon-old groups (p<0.05). In fatty acid composition of the 12 mon-old groups, loin muscles had significantly higher levels of C14:0, C16:1n7, C18:1n9, and mono-unsaturated fatty acids (MUFA), and top round muscles had significantly higher levels of C16:1n7, C18:1n7, C18:1n9, MUFA, MUFA/SFA. Loin muscle from the 3- and 12 mon-old groups had significantly higher scores for tenderness and overall likeness. Top round muscle from the 9- and 12 mon-old groups had significantly higher scores for overall likeness than those from the other age groups.

• 한국산학기술학회논문지
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• 제13권10호
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• pp.4629-4635
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• 2012

본 연구의 목적은 중량물 들기 작업시 비대칭 무게중심과 상체 옆으로 기울임 여부가 어떻게 L5/S1 주변 허리 근육의 Peak EMG 진폭에 영향을 미치는지를 알아보는 것이다. 요통을 포함한 근골격계질환은 무겁지 않은 물체의 지속적인 반복 취급뿐만 아니라, 일회성의 커다란 부하도 신체 조직의 부담으로 작용하여 발생할 수 있다. 11명의 20대 대학생 남성은 15.8kg의 물체를 들어올리는 Task를 3회 실행하였다. 이 때 대칭 무게중심의 물체를 상체를 기울이지 않고 들어 올리는 경우, 비대칭 무게중심의 물체를 상체를 기울이지 않고 들어 올리는 조건, 그리고 비대칭 무게중심의 물체를 상체를 기울여서 들어 올리는 경우에 따라 6개의 L5/S1 주변의 근육들로부터 Peak EMG 진폭이 수집되어 분석되었다. 결과는 비대칭 무게중심을 지닌 물체 취급시 무게중심에서 먼 쪽의 허리 근육에서 Peak EMG 진폭이 발생하고, 그 진폭의 크기는 대칭 무게중심 물체를 취급하는 경우보다 크게 나타났다. 또한, 비대칭 무게중심의 물체를 취급할 경우 물체나 상체를 물체의 무게중심 방향으로 기울이는 것은 기울이지 않을 때보다 대측성 등근육에서 Peak EMG 진폭 증가시켰다. 이러한 연구 결과는 비대칭 무게중심의 중량물을 들어 올리는 작업에서 요통 발생을 예방하기 위한 행정적인 조치로써 가능하면 상체를 전두면 기준으로 기울이지 않는 작업자 자세 조언이 필요함을 말해준다.

• 한국전문물리치료학회지
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• 제11권4호
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• pp.19-29
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• 2004

Many muscles of the trunk and hip are capable of contributing to the stabilization and protection of the lumbar spine. To have optimal effectiveness, a training program should include dynamic back/stomach/hip exercises. This study was designed to assess the L5 level paraspinal, external abdominal oblique, and gluteus maximus muscle activities during various low back stabilization exercises. Participants were 26 healthy adults (13 males, 13 Females), aged 21 to 28 years. The surface electromyography (EMG) was recorded from the L5 level paraspinal, external abdominal oblique, and gluteus maximus muscles. The recorded signal was averaged and normalized to the maximal electromyographic amplitude obtained during the maximal voluntary contraction. The measurements were taken during 3 low back stabilization exercises. One-way analysis of variance with repeated measures was used to examine the difference, and a post hoc test was performed with least significant difference. A level of significance was set at p<.05. The significance of difference between men and women, and between the electromyographic recording sites was evaluated by an independent t-test. The EMG activity for the externus oblique and gluteus maximus muscles had significant differences among 3 exercises (p<.05). In males, the EMG activity for the external abdominal oblique muscle had significantly increased differences during exercises 1 and exercise 2 (p<.05). The gluteus maximus muscle had significantly increased differences during exercise 2 and exercise 3 (p<.05). In females, the multifidus muscle had significantly increased difference during exercise 3 (p<.05), the external abdominal oblique muscle had significantly increased difference during exercise 1 (p<.05). and the gluteus maximus muscle had significantly decreased difference during exercise 3 (p<.05). The results were that the external abdominal oblique muscle was apparently activated during the curl-up exercise in females and males, and the multifidus muscle was apparently activated during the bridging exercise in females and during the sling exercise in males and females.1)In comparison of the %MVC between males and females, exercise 2 and exercise 3 apparently activated of the multifidus and gluteus maximus muscles in both males and females (p<.05). The EMG activity of the gluteus maximus muscle of the males significantly increased during exercise 2 and exercise 3 (p<.05). The EMG activity the multifidus muscle of the females was significantly increased during exercise 2 and exercise 3 (p<.05). More research is needed to understand the nature of motor control problems in the deep muscles in patients with low back pain.

• Journal of Nutrition and Health
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• 제21권4호
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• pp.242-252
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• 1988

Branched-chain 아미노산이인 leucine이 골격근육의 단백질 합성을 촉진하는 요소로 보고되어 왔다. 이러한 역할은 다른 아미노산도 나타낼 수 없는 특이한 것이나 생체로부터 분리된 근육(isolated muscle system)에서 라는 제한된 실험조건하에 얻어진 결과에 바탕하므로, 본 연구는 생체내에서 leucine이 단백질의 생합성에 미치는 영향을 조사하고자 시도되었다. 실험동물은 정상으로 먹이를 먹인 또는 하루 굶게된 주로 leucine군과 비교군으로 나누었다. Leucine군은 80 또는 $160\mu\textrm{moles}$의 leucine을 복강으로 한번 주사하여 주입받았고 비교군에는 생리적 식염수를 같은 방법으로 주입했다. 단백질 합성속도는 $^{14}\textrm{C}-tyrosine을 주사한 후 근육의 단백질에 혼입된 $^{14}\textrm{C}의 량으로 측정하였다. 본 연구에 이용된 근육은 두가지 형태의 뒷다리 근육 즉 oxidative형 soleus와 glycolytic형 extensor digitorium longus(EDL)와 plataris근육이었다. 만 하루 굶게된 뒤의 EDL과 plantaris 근육은 $160\mu\textrm{moles}$의 leucine에 의해 단백질 합성 속도가 24%, 29% 씩 각각 상승했다. 하루 굶게된 쥐의 soleus근육과 정상으로 먹인 쥐의 어느 근육도 첨가된 leucine에 대해 반응을 보이지 않았다. Leucine에 의해 단백질 합성 속도가 상승된 근육은 굶게되므로 합성속도가 정상군의 54%로 떨어졌고 soleus근육은 정상군의 78%에 상당한 단백질 합성 능력을 가지고 있었다. 따라서 생체로부터 분리된 근육에서 동물의 영양상태나 홀몬 분비의 정상여부에 관계없이 leucin이 단백질 생합성 속도를 상승시키는 현상은 생체내에서 재현되지 않았다. 본 연구결과는 식이 제한등으로 인한 스트레스에 민감하게 반응하여 근육내 생성 활동이 저하된 특수한 상태에서만 leucine은 골격근육의 질소 보유능력을 상승시키리라는 것을 시사한다.