• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1449-1450
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• 2013

• Exercise Science
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• v.21 no.3
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• pp.289-298
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• 2012

In the present study, we investigated the effect of treadmill exercise on apoptotic neuronal cell death in the retinas of streptozotocin-induced diabetic rats. Twenty-eight male Sprague-Dawley rats were used for this study. The animals were divided into four groups(n = 7 in each group):(1) control group, (2) exercise group, (3) diabetes-induced group, (4) diabetes-induced and exercise group. Diabetes mellitus(DM) was induced by intraperitoneal injection of streptozotocin. The rats in the exercise groups were forced to run on the treadmill for 30 minutes once a day, five times per a week, during 12 weeks. In this study, a terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling(TUNEL) assay and western blot for the expressions of caspase-3, cytochrome c, Bax, and Bcl-2 in the retinas were conducted for the detection of apoptotic retinal cell death. The present results showed that the number of TUNEL-positive cells was increased in the retinas of the diabetic rats, whereas treadmill exercise suppressed this number. The expressions of pro-apoptotic factors caspase-3, cytochrome c, and Bax were enhanced and the expressions of anti-apoptotic factor Bcl-2 was decreased in the retinas of the diabetic rats. In contrast, treadmill exercise suppressed the expressions of caspase-3, cytochrome c, and Bax and increased the expression of Bcl-2. The present study demonstrated that treadmill exercise suppressed diabetes-induced apoptotic neuronal cell death in the retinas. Based on the present results, treadmill exercise may be effective therapeutic strategy for the alleviating complications of diabetes patients.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2788-2794
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• 2013

The study was conducted to determine the effect of community ambulation training and treadmill training on the gait ability and stroke impact scale in patients with hemiplegia due to stroke. Twenty-two patients with hemiplegia due to stroke were assigned to the community ambulation training group(n=11) or treadmill training group(n=11). Both groups were executed conventional treatment for 5 times per week for 6 weeks 30 minutes per session. Each group performed additional exercise for 30 minutes. Post treatment, compared to the treadmill training group, community ambulation training group showed significantly increased velocity, cadence, stroke impact scale(p<.05). These results support the perceived benefits of community ambulation training to augment on the gait ability and stroke impact scale of stroke patients. Therefore, community ambulation training is feasible and suitable for stroke patients.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.79-84
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• 2019

The purpose of this study was to examine the effects of treadmill exercise on the aerobic function of dance majors in their 20s. The subjects consisted of 10 female Korean dance majors in their 20s as an experimental group and 10 normal female college students as a control group, and both groups conducted treadmill gait training. Their heart rate recovery (HRR), maximal oxygen uptake (MOU), maximal voluntary ventilation (MVV), and lactate recovery rate (LRR) were measured before and after the experiment. The comparison of changes in the subjects' aerobic function before and after the experiment showed that the experimental group gained more significant effects on HRR and LRR than the control group. Therefore, treadmill gait training may help Korean dance majors to improve their basic physical strength by enhancing their aerobic function, and the findings of this study are likely to provide basic data to support scientific exercise prescriptions.

• Proceedings of the ESK Conference
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• 1996.10a
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• pp.33-40
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• 1996

본 연구의 목적은 작업생리학적 접근방법(physiological approach)을 이용하여 생리학적 작업 능력(PWC; physiological work capacity)을 추정할 경우 작업형태와 작업방법에 따른 차이점을 비교분석해 보고자 함이다. 작업유형으로는 자전거 에르고미터(cycle ergometer)와 트레드밀 (treadmill)을 사용하였고, 작업방법으로는 각각의 작업유형에 대하여 램프 테스트(ramp test 와 인크리멘탈 테스트(increemntal test)의 차이점을 비교하였다. 또한 외국인들의 생리학적 작업능력(PWC)과 한국인들의 생리학적 작업능력(PWC)을 비교,검토하여 NIOSH(National Institute of Safety and Healty)기준치를 사용하는데 문제점이 없는가를 검토해 보고자 하였다. 작업방법 에 따른 차이점은 자전거 에르고미터의 경우 램프 테스트(ramp test )253.63 ml/min로서 인크리 멘탈 테스트(increemental test) 2859.74ml/min 의 87.70 % 정도로 나타났으며, 트레드 밑의 경우 ramp test 2859.22ml/min로서 incremental test 289.46ml/min의 98.77%정도로 나타났다. 작업유형 에 따른 결과는 자전거 에르고미터의 ramp test 트레드밀의 ramp test 는 ramp test는 트레드밀의 ramp test의 88.72% 정도로 나타났으며, 자전거 에르고미터의 incremental tests는 트레이드밀 작 업의 98.% 정도로 나타났다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.1026-1027
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• 2017

안전 대응 훈련 기술은 플랜트와 같은 위험한 작업현장에서 조업자 또는 초기 대응자가 예상치 못한 사고에 대해 능동적이고 신속한 대처가 가능하도록 계획적인 사전 대응 훈련을 수행할 수 있는 시스템 기술이다. 훈련 시나리오의 가장 기본적이며 빈번하나 과업은 특정 지점으로의 이동과 원하는 시설물을 탐색하는 네비게이션 임무라 할 수 있다. 본 연구에서는 작은 크기를 가지는 단방향 트레드밀의 장점과 선회 보행이 가능한 전방향 트레드밀의 장점을 일부 결합하여, 작은 각도 범위의 좌우 선회 이동을 지원할 수 있는 트레드밀 인터페이스의 제어를 위한 기술개발 과정과 결과를 소개 하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.873-874
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• 2018

화학공정 플랜트와 같이 위험한 작업현장에서 현장 조업자 또는 초기 대응자가 능동적이고 신속한 대처가 가능한 가상현실기반 안전대응 훈련기술에 있어, 원하는 시설물을 가상으로 탐색할 수 있는 네비게이션 임무를 통한 체감공간인식 및 임무수행기술이 중요하다. 본 연구에서는 작은 크기를 가지는 단방향 트레드밀의 장점과 선회 보행이 가능한 전방향 트레드밀의 장점을 일부 결합하여, 작은 각도 범위의 좌우 선회 이동을 지원할 수 있는 트레드밀 인터페이스 시제품을 이용한 사용자 모션인식 및 통합제어 기술개발 과정과 결과를 소개 하고자 한다.

• Journal of Digital Convergence
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• v.14 no.9
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• pp.553-561
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• 2016

The purpose of this study was to compare cardiopulmonary function, RPE(Rating of perceived exertion), and blood lactate when examining the GXT(Graded exercise testing) of wheelchair treadmill and arm ergometer. Participants were 11 wheelchair basketball players with non disability. While examining the GXT of wheelchair treadmill and arm ergometer, cardiorespiratory functional capacity was measured by using $Quarkb^2$ and Polar and RPE was measured through Borg Scale. The lactate analyser, YSI-2000 was used to measure blood lactate level when resting, right after exercise, two minutes, four minutes, six minutes, and ten minutes of recovery. Data was analyzed by paired t-test using SPSS 18.0 program and significance for all statistical analysis was fixed at .05 confidence level(p<0.05). The conclusion of this study is below. First, maximal oxygen uptake which is a factor of cardiopulmonary function showed the highest with arm ergometer, the rate of respiratory exchange showed the highest with wheelchair treadmill, and maximal heart rate showed the highest with wheelchair treadmill. Second, subjective exercise intensity showed the highest with arm ergometer at the end point. Third, blood lactate level showed the highest with arm ergometer right after exercise.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.14 no.2
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• pp.62-68
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• 2005

The objective of this study is structural analysis and modal analysis of treadmill roller. A 3D finite element model is implemented to calculate the stress, strain and natural frequency for treadmill roller In order to analyses treadmill roller, many variables such as load condition, boundary condition, weight condition and resonance are considered. Natural frequency of treadmill is compare to motor revolution.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.4
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• pp.539-544
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• 2006

This study is to apply a modal analysis for a frame and roller of a treadmaill machine. A finite element model was developed to compute natural frequencies of a frame and a roller. This analysis were performed under several different conditions such as weight, boundary, and maxium stress/strain conditions.