• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.903-906
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• 2005

The purpose of this study was to analyze the muscular force of swing using the soft golf club in comparison with the muscular force of swing using normal golf club. The subject was normal adult (twenties) and performed swing motion using normal and soft golf club. And then we compared muscular power soft golf club with normal golf club of the subject. The muscular power of the subject was measured by MP 100(BIOPAC Systems, Inc.). For the analysis of muscular power of swing using soft golf club, we measured EMG(Electromyography) of the subject. The position of muscle was deltoid, latissimus dorsi, external oblique and rectus abdominis of the upper limbs and rectus femoris, biceps femoris, gastrocnemius and soleus of the lower limbs. The result of experiment, muscle pattern of swing using soft golf club was similar to pattern of swing using normal golf club and muscular power of subjects using the soft golf was smaller than normal golf.

• 국제물리치료학회지
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• 제3권2호
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• pp.469-474
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• 2012

The purpose of this study is to analyze the correlation between the stature and the muscle performance ratings and the subjective discomfort rations at performing lower arm's pronation and supination according to change sin the height of working table for more efficient performance at designing a working table and performing a work. For the purpose, this study conducted an experiment targeting 40 people in their 20s, who were classified into 4 groups each group composing 10 people at intervals of 5cm from the standard stature of 166.5cm. The experiment measured the maximum isometric pronation and the supination muscular power, and at measuring the factors, the heights of working tables were set as 800mm, 850mm, and 900mm. From the measurement results, it was found that the stature and the maximum muscular power was correlated. That is, as the experiment groups's average stature is higher, the maximum muscular power was higher. For the correlation between the motion patterns(pronation and supination) and the maximum muscular power, it was seen that the maximum muscular power was higher at performing the pronation than the supination. In the correlation between motion patterns and the subjective discomfort ratings, it was seen that the subjective discomfort rating was higher at performing the supination than the pronation. For the correlation between height adjustment and the subjective discomfort ratings, as the height of working table was lower, the subject discomfort rating was lower. Therefore there was no difference in the maximum muscular power according to the height changes of working table, but it was found that as the working table was higher, the user felt more comfortable.

• 한국정밀공학회지
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• 제27권6호
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• pp.82-89
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• 2010

Ankle-foot orthosis with an artificial pneumatic muscle which is intended for the assistance of plantarfelxion torque was developed. In this study, power pattern of the device in the various pneumatics and the effectiveness of the system were investigated. The pneumatic power was provided by ankle-foot orthosis controlled by user‘s physiological signal, that is, muscular stiffness in soleus muscle. This pneumatic power can assist plantarflexion torque of ankle joint. The subjects performed maximal voluntary isokinetic plantarflexion motion on a biodexdynamometer in different pneumatics, and they completed three conditions: 1) without wearing the orthosis, 2) wearing the orthosis with artificial muscles turned off, 3) wearing the orthosis activated under muscular stiffness control. Through these experiments, we confirmed the effectiveness of the orthosis and muscular stiffness control using the analyzing isokinetic plantarflexion torque. The experimental results showed that isokinetic torques of plantarflexion motion of the ankle joints gradually increased in incremental pneumatic. The effectiveness of the orthosis was -7.26% and the effectiveness of the muscular stiffness control was 17.83% in normalized isokinetic plantarflexion torque. Subjects generated the less isokinetic torques of the ankle joints in wearing the orthosis with artificial muscles turned off, but isokinetic torques were appropriately reinforced in condition of wearing the orthosis activated under muscular stiffness control(17.83%) compared to wearing the orthosis(-7.26%). Therefore, we respect that developed powered orthosis is applied in the elderly that has weak muscular power as the rehabilitation equipment.

• 대한추나의학회지
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• 제6권1호
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• pp.177-187
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• 2005

Objective : We want to investigate the patient who has a muscular dystrophy how much muscular strength is improved and general conditions are changed after applying Sa-am acupuncture. Method : The patient who has a muscular dystrophy was evaluated by AchR-ab, VAS, pulling power test after applying Sa-am acupuncture.

• 운동영양학회지
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• 제13권3호
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• pp.193-201
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• 2009

The purpose of this study was to examine the effects of combined exercise and creatine consumption to muscular function and pain in 24 middle-aged men in back pain patients. The patients were categorized into three groups; 8 patients underwent combined exercise alone, 8 patients underwent creatine consumption as well as combined exercise and the control group was 8 patients without these options. The follow-up period was 10 weeks doing aerobic exercise, resistance exercise or creatine consumption. The group that underwent creatine intake as well as combined exercise simultaneously showed significant increase on the 0°, 12°, 24°, 36°, 48°, 60° and 72° of back muscular power in the muscular function changes compared to control group, furthermore, it showed statistically significant improvement on the 24°, 36°, 48° and 60° in the combined exercise group compared to control group. However, between the group that underwent creatine consumption as well as combined exercise and the group that underwent combined exercise, the back muscular power was high in the all angles, but it was not statistically significant. The group that performed both creatine consumption and combined exercise showed pain relief relatively, comparing with either combined exercise or control group and the pain was also alleviated in the combined exercise group.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.944-947
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• 2004

The purpose of this study was to identify the characteristics of muscular power by COP(center of pressure) training according to the angle variation of tilting bed. We changed the angles of tilting bed(up-down direction 0$^{\circ}$, 15$^{\circ}$, 30$^{\circ}$, 45$^{\circ}$ and right-left direction -15$^{\circ}$, 0$^{\circ}$, +15$^{\circ}$) for the correlation between angles and muscular power. And we measured EMG(electormyography) of lower limbs muscle(rectus femoris, biceps femoris, and gastrocnemius, tibialisa anterior) during COP training. COP training was divided by the COP trace training(in all direction) and sine wave trace training(vertical and horizontal direction). As the result, we obtained the improvement effect of COP training and we showed that electromyography(EMG) variations of lower limbs muscle on the angle variations of tilting bed were investigated.

• PNF and Movement
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• 제8권3호
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• pp.9-16
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• 2010

Purpose : The purpose of this study was to investigate effects of kinesio taping of thigh muscle on isokinetic muscular function during closed kinetic chain exercise of lower extremity. Methods : Twenty healthy males were participated in this study. The isokinetic muscular function of closed kinetic chain were measured for peak torque, peak torque % body weight, average power, max rep tot work before and after application of kinesio taping on thigh muscles. Results : At $60^{\circ}/s$ peak force and peak force % body weight were significant increased in both extension(p<0.01) and flexion(p<0.001) after applying kinesio taping. At $180^{\circ}/s$ average power was significant increased in both extension and flexion after applying taping(p<0.001). At $240^{\circ}/s$ max rep tot work was significant increased in both extension(p<0.001) and flexion(p<0.05). Conclusion : This study suggests that application of kinesio taping on thigh muscle was more effective to improve isokinetic muscular function in closed kinetic chain exercise of lower extremity.

• 대한물리치료과학회지
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• 제9권4호
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• pp.105-112
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• 2002

When any damage or disease occurs, muscular strength and muscular endurance are lowered, and thus, if one is able to be restored from the damage or the disease, appropriate stimulus is required, since the muscles have to restore their proper functions. For such stimulus, the way of exercising and the way using electric stimulus are used in physical therapy. In order to examine the change in muscular strength, muscular endurance and girth of limbs for Biceps brachii, according to the lands of stimulus, in this article a total of 42 healthy male and female adults in their twenties were randomly sampled, and a series of tests were conducted for 6 weeks, for 15 minutes per once, 3 times per week, respectively, dividing them into the group for RUS(Russian Current Stimulation), PRE(Progressive Resistive Exercise) and P+R(RUS + PRE). The findings showed that the change in muscular strength was most significant as for the group for P+R, since it increased from $62.12{\pm}25.30$ before experiment to $95.78{\pm}34.07$ after 6 weeks: the change in muscular endurance was most significant as for the group for P+R, since it increased from $17.57{\pm}6.63$ to $42.86{\pm}10.24$; and the change in the girth of limbs was slightly significant only in the group for P+R, and the remaining two groups showed no significance.

• 한국산학기술학회논문지
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• 제12권9호
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• pp.4008-4014
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• 2011

이 연구는 뇌졸중 환자를 대상으로 임상척도를 이용하여 엉덩관절의 근력, 감각과 경직이 균형능력에 미치는 영향을 알아보기 위해 실시되었다. 32명의 뇌졸중 환자를 대상으로 도수근력검사를 사용하여 환측 다리의 가벼운 접촉감각과 엉덩관절굽힘근, 폄근, 모음근, 그리고 벌림근의 근력을 측정하였고, 수정 Ashworth 척도를 이용하여 넙다리근의 경직을 측정하였으며, 기능적 균형 척도를 이용하여 정적 및 동적균형능력을 측정하였다. 수집된 자료는 다중회귀분석을 이용하여 분석하였다. 연구결과 정적균형에 유의한 영향을 미치는 요인은 엉덩관절벌림근력, 넙다리 경직, 가벼운 접촉감각인 것으로 나타났으며(p<0.05), 설명력은 80.5%인 것으로 나타났다. 동적균형능력에 영향을 미치는 요인으로는 엉덩관절벌림근력과 가벼운 접촉감각인 것으로 나타났으며(p<0.05), 설명력은 77.9%인 것으로 나타났다. 엉덩관절벌림근력과 가벼운 접촉감각은 정적균형과 동적균형 모두에 영향을 미치는 것으로 나타나, 앞으로 균형에 대한 검사와 중재 프로그램 제공 시 엉덩관절벌림근력과 가벼운 접촉감각 요인을 고려하는 것이 필요할 것으로 여겨진다.

• 대한산업공학회지
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• 제19권4호
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• pp.87-96
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• 1993

Spectrum analysis of surface electromyogram (FMG) signals is an effective approach to the study of localized muscular fatigue during isometric contraction. Many investigators have con firmed the frequency of the EMG signals being lowered during sustained contaction. In this study, the cyclic loading tasks were performed, and a comparison was made for the median power frequency shift pattern of the EMG signals with the sustained contraction of the same load. The median power frequency shift of the EMG signals for the cyclic loading task was found to be a part of that for the sustained contraction. Based on this result, a new muscle fatigue index was computed by normalizing the duration of the sustained contraction. A fatigue index was obtained as a function of exertion level and the work/rest schedule. With the proposed fatigue index, it is possible to evaluate or predict the degree of muscular fatigue for a physically demanding task.