• Journal of Korean Biological Nursing Science
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• 제18권2호
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• pp.102-109
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• 2016

Purpose: The purpose of this study was to describe sports injuries among elderly people and to compare physical activity, perceived health status and exercise self-efficacy between elderly people who had experienced a sports injury and elderly people who hadn't. Methods: The sample of this study were 100 elderly in Korea, 51 of whom had had a sports injury. The study used questionnaires to gather data. There were 8 demographic factors, 4 factors related to physical activity, perceived health status and exercise self-efficacy of the subjects. Data were analyzed by frequencies, chi-square test, and t-test. Result: Among the sports injured elders, one occurrence of a sport injury was 86.3%. There were more outdoor than indoor sports injuries of elders (66.7%), and sports injuries of elders occurred more in the winter (82.7%). The major cause of the sports injuries was loss of balance. Ankles were frequently damaged from these injuries. The most significant change after the sports injury was reduction of physical activity (60.8%). There were significant differences between sports injured elderly and non-injured elderly for age (${\chi}^2=2.58$, p=.011) and the amount of physical activity (t=1.96, p=.050), but there was no significant difference in perceived health status and exercise self-efficacy. Conclusion: To prevent sports injuries in the elderly means to maintain a medium level of physical activity and to improve their balance.

• 한국컴퓨터정보학회논문지
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• 제28권5호
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• pp.83-93
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• 2023

본 연구는 자전거에 의한 통증 및 부상의 원인과 종류 자전거피팅을 통한 통증 및 부상을 개선하고 재활방법을 제안하는 것을 목적으로 한다. 자전거에 의한 통증 및 부상은 크게 무릎, 발목부위 통증, 손목, 어깨, 목, 허리부위 통증, 엉덩이 통증으로 나눌 수 있다. 이러한 통증 및 부상의 원인은 잘못된 자전거피팅과 자세에서 비롯된다. 이러한 통증 및 부상을 개선하고 재발을 방지하기 위해서는 적절한 자전거피팅과 재활운동이 필요하다. 통증 및 부상은 운동성 통증과 고정된 자세에 의한 통증으로 나뉘며 운동성 통증의 경우 염증치료와 함께 재활운동이 필요하고 고정된 자세에 의한 통증은 정확한 신체의 특징을 이해하고 신체의 특징에 맞는 자전거 자세를 학습하고 연습해야 한다. 이런 방법을 통해 자전거 통증 및 부상의 재발을 예방하고 나아가 안전한 자전거 문화를 정립할 수 있는 환경을 조성하는데 이바지할 수 있다.

• 한국운동역학회지
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• 제17권4호
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• pp.99-106
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• 2007

The gait instability in the elderly has been associated with age-related deterioration in physical strength and reducing the potential for elderly falls requires regular exercise. In 2005, National Center for Injury Prevention and Control(NCIPC) reported that most elderly falls occur during activities in daily living(ADL). To better reveal biomechanic mechanisms underlying age-related degeneration in gait stability, and to enhance the assessment of falls risk, an accurate quantification of a person's balance maintenance during locomotion is needed. Instantaneous orientation of the line connecting COP and COM can characterize whole body position with respect to the supporting foot during gait and the angle between this line and the vertical line passing through the COP known as a good assessment to detect the elderly gait instability. Therefore the purpose of this study was to investigate a 6-month walking exercise effects in reducing elderly fall risk factors by using COP-COM inclination angles. Twenty-two community-dwelling elderly participated this study. The participants performed a walking exercise(3 times/week, 1 hour/visit) for 6 months. Laboratory kinematics during walking was assessed at months 0, 3 and 6. Significant increased in gait velocity was found among periods(p=.011, $1.25{\pm}.03$, $1.32{\pm}.03$, and $1.39{\pm}.04\;m/s$ in 0-, 3-, and 6-month, respectively). Also, significant differences in anterior and posteriror inclination angles were found among the periods(p<.05; posterior inclination angles: $12.8{\pm}2.2$, $11.0{\pm}2.9$, & $10.9{\pm}1.9$; anterior inclination angles: $13.7{\pm}1.7$, $14.6{\pm}3.2$, & $1.46{\pm}.21$ in 0month, 3month, & 6month, respectively). These findings provide evidence of significant reduced fall risk factors of community-living older adults associated with a systematic walking program.

• 대한의용생체공학회:의공학회지
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• 제28권6호
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• pp.744-749
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• 2007

Kinematic and kinetic analysis has been performed for Soft Golf swings utilizing realistic three dimensional computer simulations based on three dimensional motion tracking data. Soft Golf is a newly developed recreational sport in South Korea aimed to become a safe and easy-to-learn sport for all ages. The advantage of Soft Golf stems from lighter weight of the club and much larger area of the sweet spot. This paper tries to look into kinematic and kinetic aspects of soft golf swings compared to regular golf swing and find the advantages of lighter Soft Golf clubs. For this purpose, swing motions of older aged participants were captured and kinematic analysis was performed for various kinematic parameters such as club head velocity, joint angular velocity, and joint range of motions as a pilot study. Kinetic analysis was performed by applying kinematic data to computer simulation models constructed from anthropometric database and the measurements from the participants. The simulations were solved using multi-body dynamics solver. Firstly, the kinematic parameters such as joint angles were obtained by solving inverse dynamics problem based on motion tracking data. Secondly, the kinetic parameters such as joint torques were obtained by solving control dynamics problem of making joint torque to follow pre-defined joint angle data. The results showed that mechanical loadings to major joints were reduced with lighter Soft Golf club.

• 한국운동역학회지
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• 제12권2호
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• pp.319-330
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• 2002

A toe spring and ball girth data, when marathone shoes research, development, and production in Korea, is a important point in athlete shoe research. It is clear from the results presented that any differences between MA3 and MA1, MA4 in 70%, 80% session in forepart last comparision. Especially the more 70%-80% session getting wide, the more 90% session getting up, Also, To development for high performance marathones shoes last, in all session, in korean style, 70%, 80%, and 90% session part function changed and consequently there is a need for normative last data that desribe foot, last shape, dimension. this leads to the conclusion that unique shoe lasts for both marathone shoes developmented last comparison are required for optimal marathone shoe comfort. The more ball girth construction will wide in forepart in last, the more comfort characteristic sill development. But relative with performance ability, it is need to research. The further study of Korea marathoner forefoot measurements(70% session ~ 90% session) among toe spring's angular difference of marathone last to north american and Korea marathone shoes last is required to develop and improve athletes performance in an effective way of study and to prevent forefoot injury.

• 한국운동역학회지
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• 제21권3호
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• pp.345-352
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• 2011

The purpose of this study was to determine how spandex wear with compressive band affects biomechanical parameters during a golf swing. Nine male golf players, each with at least 6 years golf experienc(handy 4.5${\pm}$5.4), were recruited as the participants. Eight pairs of surface electrodes were attached to the left and right side of the body to monitor the pectoralis major(PM), external abdominal oblique(AO), erector spinae(ES), and vastus lateralis(VL). This study showed that the angular velocity of the club in EG were increased during the down swing phase but X-Factor and X-factor Stretch were reduced. Average and maximum nEMG (normalized EMG) values of the left AO(external abdominal oblique) were less in EG(experimental group) compared with CG(control group) during the back swing, whereas those of left PM(pectoralis major) in EG were greater than CG. It is more likely that EG performed effectively golf swing without excess muscle activity. Thus, the spandex wear with compressive band played an important role in improving swing performance with injury prevention. This has led to suggestions of the need for further kinetic and kinematic analyses to evaluate its function.

• 한국운동역학회지
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• 제22권2호
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• pp.237-242
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• 2012

The purpose of this study was (a) to develop carbon nanotube-based shock absorbers for reducing potentially harmful impact forces and excessive foot pronation, and (b) to briefly determine how the effects of carbon nanotube-based shock absorbers on biomechanical variance during drop landing. A university student(age: 24.0 yrs, height: 176.2 cm, weight: 679.5 N) who has no musculoskeletal disorder was recruited as the subject. Hardness, specific gravity, tensile strength, elongation, 100% modulus, tear strength, split tear strength, compression set, resilience, vertical GRF, and loading rate were determined for each material. For each dependent variable, a descriptive statistics was used for different conditions. The property test results showed that tensile strength, tear strength, split tear strength, compression set, and resilience in carbon nanotube-based shock absorbers were greater than general Ethylene Vinyl Acetate(EVA). These indicated that resistance against variable strength in developed carbon nanotube-based shock absorbers were greater than general EVA. In vertical GRF of CNTC was less than those of EVA during drop landing and loading rate of CNTC was greater than EVA. It seems that the use of CNT can be a effective way of reducing and controlling shock from impact.

• 대한물리의학회지
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• 제2권1호
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• pp.65-72
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• 2007

Purpose : The purpose of this study is a research on the evaluation about shoulder joint function. Methods : It's based on the reference books. Result : Shoulder joint has the biggest ROM in human body, and it is a joint that stability and mobility are required at the same time sport art. Especially, function of shoulder joint than other what item players of more important overhead item correct diagnosis and evaluation for shoulder joint injury require. Measurement equipment for shoulder joint is helping a lot of incorrect diagnosis and analysis about shoulder joint function of overhead players through a lot of developments. Conclusion : I think a lot of helps torture in motor ability elevation of players and player protection as analysis by special quality in item of overhead players.

• 대한의용생체공학회:의공학회지
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• 제31권2호
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• pp.151-161
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• 2010

Soft Golf is a newly developed recreational sport in our research team aimed to become a safe and easy-to-learn sport for all ages. The advantage of Soft Golf stems from lighter weight of the club and much larger area of the sweet spot. The purpose of this study is to analyze ground reaction force(GRF) and joint angle during soft Golf club and regular golf club swing. The GRF of golf swing was recorded by 3-D motion analysis system and forceplate. The joint angle of golf swing was obtained from computer simulation model. The GRF and joint angle of golf swing are used to analysis of golf swing pattern. The pattern of GRF and joint angle during soft golf club swing was similar to that during regular golf club swing. This result means that soft golf club reduces the risk of injury and has an effect on similar entertainment of regular golf.

• 한국운동역학회지
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• 제19권3호
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• pp.611-617
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• 2009

본 연구의 목적은 손의 부상 정도나 장애에 대한 치료의 진행 과정에 대하여 정량적인 분석을 하기 위한 것이다. 제안한 평가 항목들은 최고 악력, 악력이 가해지는 시간, 평균 악력, 악력 측정 시작부터 최고 악력까지 도달하는 순간 가속 악력, 일정한 악력 유지 시간을 측정하기 위한 동적 지구력 시간, 주어진 시간 동안 일정 악력을 유지하는 정적 지구력에 대한 변화율 등이다. 구현된 데이터베이스 시스템은 트레이닝, 기능 평가, 개인 정보 등을 기록 할 수 있도록 하였다. 또한, 악력 시스템은 60kg 범위에서 측정이 가능하도록 Load-cell을 이용한 악력 센서를 개발하였다. 제안된 시스템은 의사들이 환자의 재활 프로그램을 진행하는 데 있어 환자의 상태 이해와 해석에 편리와 효율을 제공할 것이다.