Kinematical Analysis of Uchimata in Judo

( Sung Hyu Shin ),( Myoung Sung Son ),( Won Sub Kim ),( Seung Pil Choi ) 한국운동역학회 2005 한국운동역학회 논문 영문초록집 Vol.2005 No.-

파킨슨 환자들의 질환등급, 균형, 낙상 및 보행능력 평가척도 고찰

김창환 ( Chang Hwan Kim ),김미영 ( Mi Young Kim ),임비오 ( Bee Oh Lim ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.4

Objective : The purpose of the study was to investigate and compare the differences between Parkinson``s disease rating, balance, fall and gait scales. Results : Parkinson``s disease rating scales include the Hoehn-Yahr Scale and the Unified Parkinson``s Disease Rating Scale (UPDRS). The Hoehn-Yahr Scale can measure disease rates easily; however it is not sensitive enough to evaluate the disease’s process and management. UPDRS’s advantage is in it’s higher inter-reliability score; however it is more complicated to use. Parkinson``s balance scales are comprised of the Berg Balance Scale (BBS) and the Activities-Specific Balance Confidence Scale (ABC). BBS has the advantage in that it is cheaper to measure and simple in use. ABC’s advantage is especially in it’s ability to measure higher functional levels; however it is more difficult measure responses due to scores appearing in both extremes. The Fall Efficacy Scale (FES) and The Survey of Activities and Fear of Falling in the Elderly (SAFE) are Parkinson``s fall scales. FES’s leverage over SAFE is that it is simpler to measure; however it does not coincide with responses which proves disadvantageous in measuring balance loss in high-level Parkinson``s patients. SAFE’s advantage is in it’s simpler use and ability to be utilized without encountering the fear of fall; however it’s at a disadvantage in regards to its use with multilateral aspects providing insufficient inspection. Lastly, the Dynamic Gait Index (DGI) and the Functional Gait Assessment (FGA) are Parkinson``s gait scales. DGI is advantageous in its ability to test gait ability when exposed to a variety of external environments; however it is disadvantageous in that it registers higher scores with activities. FGA’s advantage is in it’s dynamic balance test; however it at a disadvantage with those unable to walk. Conclusion : A researcher of Parkinson``s patients must choose each scale while considering their positive and negative characteristics

프로바디마사지가 뇌병변 장애우의 신체적 특성과 대동작 기능 및 관절 가동범위에 미치는 영향: 사례연구

김의숙 ( Eui Suk Kim ),양정옥 ( Jeong Ok Yang ),이중숙 ( Joong Sook Lee ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.4

Objective : The purpose of this study was to investigate the effects of the Probody Massage Program on the physical characteristics, gross motor function and ROM (Range Of Motion) of children with cerebral palsy. Method : The subjects of this study were two children who have been diagnosed with first grade cerebral palsy that utilized T development support center located in B Metropolitan city for 8 weeks, twice a week, to carry out the Probody Massage Program for 30 minutes. Physiological reactions (height, weight, BMI, blood pressure (an index of inflammation), pulse rate) and large operating functions (sitting, crawling and the joints’ range of motion as an angle of the shoulders’ upper limb articulation) were measured pretest, after 4 weeks, and after 8 weeks. Results : The Probody Massage Program showed positive changes in physical characteristics (blood pressure, sitting, and crawling), gross motor function (upper limb shoulder movement), joint range of motion, height, body weight, metabolic activation and blood circulation of children with cerebral palsy. Conclusion : We believe making a practical impact on the growth and development, functional recovery of daily life, and improvement of quality of life of children with cerebral palsy by utilizing Probody Massage Program improves blood pressure (an index of inflammation), pulse, sitting, crawling, and the joints’ range of motion as an angle of the shoulder joints’ upper limb movement of children with cerebral palsy.

한국형 봅슬레이화 개발을 위한 구간 시간과 족저압력 분석

박종진 ( Jong Jin Park ),김경훈 ( Kyung Hun Kim ),박승범 ( Seung Bum Park ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.4

Objective : A study and development of Korean Bobsleigh athletes’s shoe which considers their physical condition has yet to be completed. So this study examines the effects of running shoes used by athletes based on plantar pressure and sprint time in order to provide raw data for the development of bobsleigh shoes suitable for Koreans. Method : The study selected seven bobsleigh athletes as subjects and selected three pairs of spiked running shoes from three companies, which will be referred to as Company N (Type A), Company A (Type B), and Company M (Type C). To analyze sprint time and plantar pressure for each shoe, the subject of the study were instructed to wear the selected shoes and to drag a sled at maximum sprint for 15 meters for 15 meters for in each condition that would be in real bobsleigh competitions. Results : The average sprint intervals for each athlete in each pair of shoes revealed Type C produce the fastest sprint in the order of Type C < Type A< Type B. Shoe Type C also had the largest contact area in order of Type C > Type B > Type A (p<.01). None of the three shoe types seem to yield a distinct advantage in terms of maximum average pressure or maximum pressure. Conclusion : In the future, functional analysis should be carried out by comparing the material properties, hardness, and toe spring of shoes based on the Type C shoe from Company M in order to develop bobsleigh shoes suitable for Koreans.

네스핏 트레킹화와 평면 인솔 트레킹화의 족저압력 분석

최재원 ( Jae Won Choi ),이중숙 ( Joong Sook Lee ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.4

Objective : The purpose of this study was to investigate mean plantar foot pressure, maximum plantar pressure and ground reaction force, and center migration path of pressure according to the type of trekking shoes for the development of shoes. Method : Subjects of the study averaged 22.10±2.05 years of age. Their average height was 169.27±7.62 cm and their average weight was 64.34±10.22 kg. The method of this study was administered measuring 50 steps ,at once, 3 times at a speed of 4 km/h and using the data of 30 steps. Pedar-X system measured the mean foot pressure, maximum foot pressure, mean maximum force, and center migration path of pressure by subjects’ position while walking. Statistical analysis was performed by SPSS 23.0 using a paired t-test. Results : Results of the study showed Nestfit trekking shoes lower foot pressure of both feet in mean foot pressure and maximum foot pressure. Nestfit trekking shoes showed high ground reaction force (p<.001) in the midfoot, and low mean ground reaction force in the rearfoot. The center migration path of pressure showed the Nestfit trekking shoes were more stable than flat insole trekking shoes. Conclusion : It can be concluded that wearing Nestfit trekking shoes spreads pressure efficiently and induces walking stability because Nestfit trekking shoes spread the pressure of the forefoot and rearfoot to the midfoot and the center migration path of pressure shows regularly.

말의 4족 보법에서 속도변화에 따른 전족 움직임의 운동능력 분석

현승현 ( Seung Hyun Hyun ),류재청 ( Che Cheong Ryew ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.4

Objective : The purposes of this study was to analyze the locomotive movement of forelimbs according to changes in velocities in the quadruped cadence of horses. Methods : Horses selected as subjects consisted of Jeju pony horses (heights of withers: 1.23±0.51). Two camcorders (HDR-HC7/HDV 1080i, Sony Corp, Japan) were used to capture the movement of the horses’ forelimbs at a rate of 60 frames/sec. Additionally, raw data was collected from Kwon3D XP motion analysis package ver 4.0 program (Visol, Korea) with DARTFISH (DFKREA., Korea) video software solution. The variables analyzed consisted of 1 step lengths, 1 stride lengths, stance time, swing time, 1 stride time, velocity while walking, and trot of the horses. A two-way ANOVA and paired t-test of the variables by velocity and phase were treated at .05 level of significant difference, statistically. Results : The time elapsed of walk(stance: 0.63 sec[63.86%], swing: 0.35 sec[36.14%], 1 stride time: 0.99 sec respectively) showed significant difference with more delay than that of trot(stance: 0.29 sec[45.73%], swing: 0.34 sec[54.27% ], 1 stride time: 0.63 sec respectively), and also showed significant difference at trot in interaction (stance time>tort swing>walk swing>walk stance). The 1 step lengths and stride lengths in trot showed significant difference with longer than that of walk. Velocity of Trot showed significant difference statistically with higher than that of walk Conclusion : The horses’ velocity during 1 step lengths and 1 stride lengths showed a proportional relationship, but the correlation between the horses’ velocity and stance time showed a negative relationship during the quadruped cadence.

윈들라스 메커니즘을 적용한 트레일 워킹화 개발을 위한 생체역학적 분석

박종진 ( Jong Jin Park ),박승범 ( Seung Bum Park ) 한국운동역학회 2015 한국운동역학회지 Vol.25 No.4

Objective : The purpose of this study was to analyze the effects of the windlass mechanism in trail-walking shoe prototypes that can effectively support arches. A study of these effects should help with the development of a first-rate trail-walking shoe development guide for the distribution of quality information to consumers. Methods : The subjects were ten adult males who volunteered to participate in the study. Shoes from three companies, which will be referred to as Company S (Type A), Company M (Type B), and Company P (Type C), were selected for the experiment. The subjects wore these shoes and walked at a speed of 4.2 km/h, and as they tested each shoe, the contact area, maximum pressure average, and surface force were all measured. Results : Shoe Type A showed a contact area of 148.78±4.31 cm2, Type B showed an area of 145.74±4.1 cm2, and Type C showed an area of 143.37±4.57 cm2 (p<.01). Shoe Type A demonstrated a maximum average pressure of 80.80±9.92 kPa, Type B an average of 85.72±11.01 kPa, and Type C an average of 89.12±10.88b kPa (p<.05). Shoe Type A showed a ground reaction force of 1.13±0.06 %BW, Type B a force of 1.16±0.04 %BW, and Type C a force of 1.16±0.03 %BW (p<.05). Conclusion : The Type A trail-walking shoe, which was designed with a wide arch from the center of the forefoot to the front of the rearfoot showed excellent performance, however, more development and analysis of the windlass mechanism for a variety of arch structures is still necessary.

한국 남자 창던지기 선수들의 창의 운동학적 요인과 기록과의 관계

김태삼 한국운동역학회 2014 한국운동역학회지 Vol.24 No.3

The purpose of this study was to investigate the relationship between distance and factors of javelin in korean male's javelinthrowing. To accomplish this purpose, the analyzed trail selected total 29 trails (subjects 9) recorded more than 65 m in the 93rdNational Sports Festival. The Kwon3D 3.1 version was used to obtain the three dimensional coordinates about the top, grip, endof javelin. And the kinematic data such as projection factors and direction angle of javelin calculated using Matlab2009a program. The statical analysis on the records (n=29) were used to Pearson's product moment correlation coefficient. There was a statisticallypositive relationship between the records and horizontal velocity (r=.866, ρ<.01), height (r=.541, ρ<.001), height rate (r=.373,ρ<.05) and horizontal displacement of javelin (r=.749, ρ<.01), but the medial/lateral velocity showed a negative relationship tor=..663 (ρ<.01). The attack and yaw angle showed not a significant relationship between the records, but the medial-lateral tilt(E1:r =..557 [p<.01)] E2:r=..629 [ρ<.01], E3:r=..528 [ρ<.01]) and attitude angle (E2:r=..629 [ρ<.01], E3:r=..619 [ρ<.01])of javelin showed a negative relationship between the records, as well as the projection angle of javelin (r=..419, ρ<.05) showeda negative relationship between the records.

Change in Kinetics and Kinematics during 1-Footed Drop Landing with an Increase in Upper Body Weight

이진택,데이빗오설리반 한국운동역학회 2011 한국운동역학회지 Vol.21 No.1

The purpose of this study was to investigate changes in kinetic and kinematic variables associated with an increase in upper body weight. Eighteen healthy male university students(175.96 ± 4.19 cm, 70.79 ± 8.26 kg) participated. Eight motion analysis cameras(Qualysis Oqus 500) and 2 force AMTI platforms(Advanced Mechanical Technologies Inc. OR6-7, US) were used to record motion and forces during the drop landing at a frequency of 120 Hz and 1200 Hz, respectively. QTM software(Qualisys Track Manager) was used to record the data, and the variables were analyzed with Visual 3D and Matlab 2009. For the drop landing, a box of 4 × 2 × 0.46 m was constructed from wood. Knee and ankle maximum flexion angle, knee flexion angle, knee and ankle angle at landing, time for maximum ankle flexion after landing, and time for maximum knee flexion after landing were calculated. There was a significant change in the time for maximum and minimum ground force reaction and the time for maximum dorsal flexion after landing(p<.05) with increasing weight. There was no significant change for the hip, knee, and ankle ROM, whereas there was an increase in the angle ROM as the weight increased, in the order of ankle, knee, and hip ROM. This result shows that the ankle joint ROM increased with increasing weight for shock attenuation during the drop landing. There was a trend for greater ankle ROM than knee ROM, but there was no clear change in the ROM of the hip joint with increasing weight. In conclusion, this study shows the importance of ankle joint flexibility and strength for safe drop landing.

The Immediate Effects of Five-Toed Shoes on Foot Structure

이경옥 한국운동역학회 2011 한국운동역학회지 Vol.21 No.4

The purpose of this study is to analyze the immediate effects of five toed shoes on foot structure. Subjects consisted of 26 college-aged women with pes planus. X-ray analysis of student feet were performed both barefooted and with five toed shoes. Dependent variables were hallux valgus angle, calcaneal inclination angle, 1st metatarsal declination angle, and intermetartarsal angle. Independent t-test was used for statistical analysis along with SAS. Overall, there were statistically significant changes of test subject's dependent variables when wearing five toed shoes. Specifically, the hallux valgus angle decreased, the calcaneal inclination angle and 1st metatarsal inclination angle increased, and intermetatasal angles both increased and decreased, shifting towards normal range. In every case the dependent variables shifted towards a more normal range while subjects wore five toed shoes. This study only examined the immediate corrective effects of five toed shoes on foot structure, but long-term studies are needed to understand the prolonged effects of five toed shoes on foot structure.