• 한국전문물리치료학회지
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• 제24권4호
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• pp.38-45
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• 2017

Background: To improve muscle flexibility, static stretch is the most common type and is considered safe and effective for improving overall flexibility of muscles. During the stretch, the intensity is more likely to be determined by the degree of an athlete's pain and practitioner's skills rather than quantitative measures of stretch. It is necessary to determine the optimal intensity for the stretch. Objects: The purpose of this study is to explore the relationship between hand held dynamometer (HHD) and verbal rating scale (VRS) in comparison of the effects of continuance time on active (walking) and inactive (sitting) movement after static stretch. Methods: A cross-sectional study was conducted with a sample (n=62) recruited from a university. Participants were randomly assigned to 2 different groups (n=31 for each group) based on participants' positions either remaining in sitting or freely walking around for a series of re-assessments. Data was collected at pre-warm up, pre-stretch, post-stretch, and additional assessments at the time of 3, 6, 9, 12, 15, 20 and 30 minutes after the stretch. Results: Relationship between VRS and HHD scores represents very weak correlation (Spearman's p=-.16, p>.05). Pearson's correlation analysis was conducted following the logarithmic transformation of the two scores. Pearson's correlation after the transformation still showed a very low relationship and a poor linear relationship between the two scores (Pearson's r=-.18, p>.05). Conclusion: The optimal intensity for stretch cannot be solely determined by the subjective pain perception. The objective measurement such as HHD could be used in conjunction with the pain perception.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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• pp.249-251
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• 2005

For walking patterns of biped robots, knee-bent patterns are used in most cases. However, humans are mostly walking with their knees nearly stretched. In this paper, a human-like walking algorithm using hybrid system is proposed for biped robots, The hybrid system consists of the logically constituted discrete system, in which the discrete states are defined by considering the walking characteristics, and the continuous state system used for motor control. It is shown that the proposed algorithm is effective by experimental studies.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.2812-2814
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• 2005

본 논문에서는 이족보행 로붓의 보행패턴의 한 가지 방법으로 무릎을 피고 걷는 stretch 보행 알고리즘을 제안한다. 이전의 보행 알고리즘은 무릎을 구부리고 걷는 것이 대부분이다. 일반적으로 사람들이 걸을 때는 무릎을 거의 피고 걷기 때문에 사람과 비슷한 보행을 위해서 자세보정 시 Zero Moment Point(ZMP)를 이용한 무릎관절을 피고 걷는 보행 알고리즘을 제안하고 이의 구현을 위한 실험 수행을 통해 그 성능을 평가한다. 로봇은 보행상태에서 몸이나 발의 위치, 각도 등에 대한 보정작업이 없다면, 이로 인해 로봇의 궤적에 오차가 발생하게 되고, 그 결과 불안정하고 부자연스러운 보행을 하게 된다. 이러한 불안정성을 ZMP를 이용하여 보정 할 수 있다.

• 재활복지공학회논문지
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• 제3권1호
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• pp.7-13
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• 2009

최근 노인인구의 증가로 인해 고령자를 위한 보행 보조기에 대한 관심이 증가되고 있다. 하지만 대부분의 경우 동력이 없는 시스템으로 경사 등의 공간에서 취약성을 가지며, 사용자가 다리에 힘이 없을 경우 편하게 이동할 수 없다는 단점이 있다. 따라서 동력형 보행보조기에 대한 관심이 증가되고 있다. 대부분의 보행보조기의 사용자는 고령자 이며 사용이 간편하며 편리해야 한다. 따라서 본 논문에서는 사용자의 편리성 증진을 위해 다양한 센서 즉, 가변저항, 힘센서, 스트레치 센서 등을 사용하여 사용자의 보행의지를 파악하기 위한 장치를 개발하였다. 또한 개발된 장치에 대한 평가를 하기위해 센서의 응답성 및 복원성을 20ms단위로 측정하여 비교 평가하였다. 결과적으로 가변 저항형 핸들바의 응답성은 420ms 이며 복귀성은 380ms이고 힘센서를 이용한 핸들바 응답성은 320ms 이며 복귀성은 220ms이다. 스트레치 센서의 응답성은 160ms, 복귀성은 140ms으로 가장 뛰어난 것을 검증하였다.

• 한국운동역학회지
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• 제18권1호
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• pp.63-72
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• 2008

본 연구는 운동유형별 운동 전후 뇌졸중 환자의 보행시 하지근육 활성도의 차이를 비교 분석하여 임상에서 기능적 수행능력의 개선을 위한 효과적인 근력강화 방법을 제시하는데 그 목적이 있다. 이를 위하여 운동치료군, 탄성밴드군 및 신장반사군으로 구분하여 각각 7명씩 총 21명을 대상으로 하였고, 운동프로그램은 8주 동안 주 5회 실시하였다. 1차 단하지 지지기에서 장요근 및 대퇴이두근의 %MVIC는 신장반사군이 운동치료군과 탄성밴드군보다 높은 수준을 보였고, 반면 전경골근의 %MVIC는 탄성밴드군이 운동치료군보다 낮은 수준을 보였다. 2차 양하지 지지기에서 장요근의 %MVIC는 신장반사군이 운동치료군과 탄성밴드군보다 높은 수준을 보였고, 반면 내측 비복근의 %MVIC는 신장반사군이 운동치료군보다 낮은 수준을 보였다. 결론적으로 신장반사 운동은 운동치료와 탄성밴드를 이용한 근력강화 운동 보다 고관절의 안정성 및 하지 분절의 운동성을 제공하는 주요 근육의 활성도에 효과적인 영향을 미침으로써 임상에서 근 약화로 인한 운동 기능이 제한된 편마비 환자에게 실용적으로 접근할 수 있는 운동방법이라고 판단된다.

• 대한물리의학회지
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• 제7권2호
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• pp.191-197
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• 2012

Purpose : The purpose of this study was to examine immediate effects of 15 minutes plantarflexor static stretching in quite stance. Methods : Twenty-nine subjects were measured static balance during 1 minute in quite stance with eye closed condition before and after 15 minutes plantarflexor static stretching. Static stretching range was limited from $15^{\circ}$ to $20^{\circ}$ dorsiflexion within comfortable range. Results : The result of this study showed that postural sway significantly increased during 1 minute quiet stance after 15 minutes static stretching(p<.05). Before stretching, postural sway significantly decreased during 41-60 seconds compared to 0-20, 21-40 seconds(p<.05). After stretching, postural sway was decreased significantly over time 0-20, 21-40, and 41-60 seconds(p<.05). Conclusion : The prolong plantarflexor static stretching may require biomechanical, neurological adaptations prior to walking or sport activities for safety.

• Journal of Korean Neurosurgical Society
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• 제38권3호
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• pp.196-201
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• 2005

Objective : Among upper lumbar disc herniations, L1-2 disc herniations are especially rare. We present the specific clinical features of L1-2 disc herniation and compared results of different surgical options. Methods : The authors undertook a retrospective single institution review of the patients who underwent surgery for L1-2 disc herniation. Thirty patients who underwent surgery for isolated L1-2 disc herniations were included. Results : Buttock pain was more frequent than anterior or anterolateral thigh pain. Standing and/or walking intolerance was more common than sitting intolerance. The straight leg raising test was positive only in 15 patients [50%]. Iliopsoas weakness was more frequent than quadriceps weakness. Percutaneous discectomy group demonstrated worse outcome than laminectomy group or lateral retroperitoneal approach group. Conclusion : Standing and/or walking intolerance, positive femoral nerve stretch test, and iliopsoas weakness can be useful clues to the diagnosis of L1-2 disc herniation. Posterior approach using partial laminectomy and medial facetectomy or minimally invasive lateral retroperitoneal approach seems like a better surgical option for L1-2 disc herniation than percutaneous endoscopic discectomy.

• 한국임상보건과학회지
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• 제5권1호
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• pp.816-824
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• 2017

Purpose. This study was classified into normal and demented elderly through K-MMSE. The purpose of this study was to analyze gait characteristics of normal elderly and demented peoples using GAITRite walking system. Methods. The subjects of this study were selected as elderly people receiving home visit physical therapy. An independent t-test was conducted to verify the statistical significance of the time-space variables of the elderly with dementia. Results. Step time(p=0.041), cycle time(p=0.037), distance(p=0.024), and cadence(p=0.048) were significantly shorter in the normal elderly than in the demented elderly on flat place. The mean age was significantly longer in normal elderly than in elderly persons with dementia. Step time(p=0.022), cycle time(p=0.023), distance(p=0.019), and cadence(p=0.015) were significantly shorter in the mat walking. The mean age was significantly longer in normal elderly than in elderly patients with dementia. Stretch time, cycle time, distance, and hair support time were significantly shorter in the mat walking. The mean age of the elderly was significantly longer than that of the elderly with dementia. The spinal support time, which is a spatial variable, was significantly shorter in the normal elderly than in the demented elderly. Conclusions. It compares the various gait characteristics of the normal and demented elderly people, thereby increasing the walking ability of the elderly person more effectively. This study should be utilized as basic data for preventing fall-down.

• 한국의상디자인학회지
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• 제9권3호
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• pp.191-203
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• 2007

The purpose of this study was to present a making method of jeans pattern with high fitness after deriving the appropriate shrinkage rate by material and washing process. According to the result of the exterior evaluation of test jeans, all 6 jeans were rated high with scores close to 3.5. Following the evaluation of satisfaction of usage by physical movement, the highest ranking was in the order of walking with normal steps, back bending $90^{\circ}$, chair sitting, climbing stairs and squatting. The shrinkage rate by physical area showed the highest score in the order of pants length, waist circumference, thigh circumference, knee circumference, hem circumference, hips circumference. In addition, the shrinkage rate was higher in warp direction than weft direction after washing finishing. As for the result of addition and reduction of pattern measurements by parts of jeans, waist circumference was $3.1{\sim}5.1cm$, hips circumference was $-1.2{\sim}4.2cm$, thigh circumference was $-0.9{\sim}3.1cm$ and pants length was $3.4{\sim}6.1cm$. That is, this results showed a wide range of addition and reduction according to material and washing finishing.

• 한국의류산업학회지
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• 제17권6호
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• pp.881-894
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• 2015

The silver generation have clothing style of optimal daily life comparing than young generation because they do not participate a specific sport event but daily- life exercise. As the human body ages, the figure of the silver generation shows different body shape because upper body changes to curved figure including the belly and waist part. Therefore, clothing characteristics for the silver generation should be considered with proper function, design and textiles to optimize body movement. This study investigated various exercise types according to motion analysis of the silver generation in order to develop the design of the active T-shirts reflecting the structural properties and providing the optimum exercise circumstance. The results to consider design needs are as followed; As the T-shirts design for the flexible exercise which required frequent movement of upper body such as bending and waist twisting during body stretching, a stretch fabric applied to the waist part considering T-shirts allowance and length to make extreme elongation and support for well-fitting appearance of the T-shirts. As the T-shirts design for the instantaneous reactionary exercise, high elastic four-way stretch fabric is applied to the part of arm hole to optimize skeletal and muscle movement for entire body and arm work. As the T-shirts design for the endurance exercise such as climbing, cycling, and walking, the shoulder line of the back part has cutting line allowance to make optimum movement of the upper body but no change of the waist part.