• Journal of the Korean Home Economics Association
• /
• v.43 no.12 s.214
• /
• pp.125-134
• /
• 2005

This study was conducted to develop a comprehensive program for improving obese children's living habits such as wearing clothing and eating, and their self-esteem. Thirteen obese elementary school children, six boys and seven girls in the 4th to 6th grade, voluntarily participated in a ten-week intervention program. During the program, the obese children filled out a checklist consisted of daily ambient temperature inside the house, weight of clothing, meal diary, time taken for physical exercise, time taken for watching TV, etc. After carrying out the program, its effect was testified and evaluated. Percent body fat of the children measured using a body composition analyzer was reduced by $1.9\%$ after the program (p<.01). Wearing behavior of clothing was positively changed in view of the high correlation between ambient temperature and clothing weight (r=-.917, p<.01). Ability of dietary self control was improved and eating time was lengthened. Self-esteem was improved in global self-worth, athletic competence, and behavior/conduct. It was suggested that active interest of the family would be helpful and that an intervention program over longer than ten week would be necessary to improve childhood obesity.

• Physical Therapy Korea
• /
• v.12 no.1
• /
• pp.22-27
• /
• 2005

The purpose of this study was to investigate the effects of visual information and different elevations of medially wedged insoles on the proprioceptive sense of the knee joint. The subjects of this study were 16 able-bodied men who were not athletic. An electrogoniometer was used to determine the error value between calculated 50% of full flexion (target position) and performed 50% of full flexion in a standing position with the upper extremities crossed. Tests were randomly performed in $2{\times}4$ conditions. Visual variations included open eyes vs. closed eyes, while the elevation was adjusted through the use (or lack thereof) of medially wedged insoles of 10 mm, 14 mm, and 18 mm. The average error value in each condition was statistically analyzed. The findings of this study revealed as follows: 1) The average error value was significantly higher with the subjects' eyes open than with their eyes closed (p<.05). 2) The averaged error value was also significantly higher when the subjects were elevated 18 mm than with no elevation at all (p<.05). The findings of this study should be considered in lower extremity rehabilitation programs when medially wedged insoles used.

• Proceedings of the Safety Management and Science Conference
• /
• 2009.11a
• /
• pp.15-24
• /
• 2009

Cycling that transform human energy into mechanical energy is one of the man-machine systems out of sports fields. Benchmarking means " improving ourselves by learning from others ", therefore benchmarking toward dominant cyclist is necessary on field. the goals of this study were to provide important factors on multi-disciplines (kinematics, physiology, power, psychology) for a tailored-training program that is suitable to individual characteristics. Two cyclist participated in this study and gave consent to the experimental procedure. one was dominant cyclist (years:21 yrs, height:177 cm, mass:70 kg), and the other was non-dominant cyclist(years:21, height:176, mass:70). Kinematic data were recorded using six infrared cameras (240Hz) and QTM (software). Physiological data (VO2max, AT) were acquired according to graded exercising test with cycle ergometer and power with Wingate test used by Bar-Or et. al ( 1977) and to evaluate muscle function with Cybex. Psychological data were collected with competitive state anxiety inventory (CSAI-2) that were devised by Martens et. al (1990) and with athletes' self-management questionnaire (ASMQ) of Huh (2003). It appears that the dominant's CV(coefficient of variability) was higher than non-dominant's CV in Sports Biomechanics domain, that the dominant's values for all factors ware higher than non-dominant's values in physical, and physiological domain, and their values between cognitive anxiety and somatic anxiety were contrary to each other in psychology. Further research on multi-disciplines may lead to the development of tailored-optimal training programs applicable with key factors to enhance athletic performance by means of research including athlete, coach and parents.

• Journal of Digital Convergence
• /
• v.14 no.6
• /
• pp.477-487
• /
• 2016

This study examines the relationship between ego-resilience, mattering and school life adjustments of elementary students participating in physical activity after school. The number of subjects for this study were 429 who were participating in the physical activity after school in Gyeonggi-do. The reliability and validity test of the questionnaire and descriptive analysis, factor analysis, correlation were conducted by using SPSS 20.0 and structural equation model was conducted by using AMOS 20.0 program. The results are as follows; First, ego-resilience of elementary students participating in physical activity after school affects their mattering. Second, mattering of elementary students participating in physical activity after school affects their school life adjustments. Third, ego-resilience of elementary students participating in physical activity after school affects their school life adjustments. Lastly there is a causal relationship between ego-resilience, mattering and school life adjustments of elementary students participating in physical activity after school.

• Journal of Digital Convergence
• /
• v.15 no.1
• /
• pp.497-507
• /
• 2017

The purpose of this study was to investigate the relationship among major satisfaction, career preparation behavior and career sense maturity of sports-related university students. To achieve the objective of this study 221 students in sports-related university were investigated with convenience sampling method. Frequency analysis, exploratory factor analysis, confirmatory factor analysis, correlations analysis and structural equation model analysis were executed using SPSS Statistics v21 and SPSS Amos v21. As the results, the following conclusion was derived. First, it was discovered that the major satisfaction had static influence to the career preparation behavior. Second, it showed that the major satisfaction gave static influence to the career sense maturity. Third, it showed that the career preparation behavior affected the career sense maturity.

• Journal of Digital Convergence
• /
• v.15 no.1
• /
• pp.547-557
• /
• 2017

The purpose of this study was to investigate the effect of 3D PRINTING and physical education central STEAM program on the subject interest and creative attitude of middle school students. In order to achieve this purpose, this research collected data from two different groups; a control group (n=98) and a comparison group (n=101) who are attending middle schools located in Gyeonggi-do. The exploratory factor analysis, reliability analysis, independent t-test and paired t-test were conducted by the IBM SPSS 20.0 program. The results are as follows; First, physical education central STEAM utilizing 3D PRINTING is efficient in the subject interest. Second, physical education central STEAM utilizing 3D PRINTING is efficient in the creative attitude.

• Journal of Digital Convergence
• /
• v.10 no.11
• /
• pp.395-402
• /
• 2012

This study has been conducted to design and implement smart phone-based application which can keep records effectively to improve athletes' ability. To boost their performance, they need to receive training as realistic as possible. As a way to do that, training should be performed with some fitness equipments, sporting apparatus, facilities, and conditions. However, it is also possible to improve their ability by motivating athletes with checking and recording their performance. This study ascertains that using scoring records actually motivates athletes when comparing the result of youth basketball team using the records keeping system with that of not using it. Accordingly, smart phone-based records keeping application has been designed and developed. Also, through a survey targeting athletic coaches who have used the system, training efficiency has been measured and it turns out that it actually motivates athletes to improve their abilities.

• Korean Journal of Applied Biomechanics
• /
• v.14 no.1
• /
• pp.145-160
• /
• 2004

The purposes of this study to provide quantitative data in necessary to advance techniques kinematic analysis of Cucarachas which is an action of Rumba. Then, this study is performed on 5 female players who have won within the third prize at a national athletic meeting. When whole foot reached to floor, Displacement of right-left hip joint (until $E1{\sim}E3$ average moved 15.15cm)is found at right-left direction since the hip joint is turned to right back. On the other side, large displacement is shown because Rumba Cucaracha Movement is expressed by maximum shift of hip joint to right and left direction. Displacement of right hip joint(E3$57.40{\pm}7.46$) is found in front and in rear direction since hip joint is moved in rear and in front to turn the hip joint. It may be stated that this is ideal displacement expressed by movement of whole body with artistic poise and presentation because role of hip joint is very important in technical and artistic side. Angle of right shoulder joint E2($105.44{\pm}9.64$) is got wider. It may be stated that player shifts up and abduct elbow joint to right since center of gravity of player is exceedingly shifted to right in this motion of Cucarachas. On the other hand, since this motion is abducted right elbow and shrunk external abdominal oblique to him center of body to left front of hip joint, the angle becomes narrow. It is shown that angle of knee in right knee joint E4($75.44{\pm}2.61$) is large since right leg and hip joint is turned by foot using reaction of ground and so center of body is shifted to left. Large angle of ankle E4($134.40{\pm}10.50$) in Cucaracha Movement is shown by the action of twist force using narrow part of foot and compression force against ground with adduction speed of arm. The various kinematic analyses associated with motions of dance sport have not been sufficiently peformed so far, and thus a number of research projects for dance sport should be proposed and performed to be continuous.

• Korean Journal of Applied Biomechanics
• /
• v.14 no.1
• /
• pp.27-40
• /
• 2004

The purpose of this study was to provide basic data for improving athletic performances by analyzing the kinematic variables of the Double Backward Somersault on the Parallel Bars through the 3D motion analysis. The subjects in this study were 5 male gymnasts who were ranked as national athletes. The results are as follows. 1. A total time(Mean Time) of performance showed $2.72{\pm}0.82\;sec$. and flight time to landing after releasing was 0.87sec.(mean). In order to perform better stable flying movement, the flight time should be increased. 2. In the change of velocity of the center of mass, when the increasing ascension velocity of the upper point was high, the position in the top point was high on releasing. 3. In the position variable of the center of mass, the mean of upper-bottom position in horizontal posture was $242.1{\pm}6.5cm$, $232.8{\pm}6.4cm$ in releasing, and $265.0{\pm}5.6cm$ in the highest point. This result is explained that the position of center of mass can be raised by using elastic power when wrist raised the bar in the releasing movement. 4. The angle of shoulder joint was $271.1{\pm}14.0$. Such a big angle influences a negative effect on the releasing velocity, because trunk is not a position in the enough vertical direction. 5. The ankle of hip joint in hand-standing was $191.1{\pm}5.9$, $118.8{\pm}5.3$ in releasing, and $122.3{\pm}5.3$ in taking on. Therefore, the result suggests that trunk should be straightly raised in taking on.

• Fire Science and Engineering
• /
• v.28 no.2
• /
• pp.48-53
• /
• 2014

In this study, we would evaluate fire risk by domestic standard for artificial turf installed on field and roofs. Today domestic regulation for artificial turf only applies to outdoor uses and especially KS M 3888-1 has compulsion but limited to school athletic facilities. Indoor regulation complying with National Emergency Management Agency (No. 2012-35) was enacted as recommendations. Thus this study did combustion test of artificial turf installed on field. Analyzed result by 45 degree flammability test, standard was inadequate to judge the fire risk so we compared and analysed its characteristic through combustion test of flame retardant finishing carpet used as flooring. Test and assessment result of its ignitionability by 45 degree flammability test showed that carpet was satisfied with flame retardant finishing performance standard contrary to artificial turf. For this reason, by conducting cone calorimeter test, the combustion property after ignition would be analyzed and evaluated and then this study will suggest a countermeasure for strengthening standard.