• Journal of Digital Convergence
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• v.12 no.12
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• pp.651-658
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• 2014

The purpose of this study is to see how the sling lumbar stabilization exercise affects muscle body type and subjective pain degree of 17 middle-age men who are diagnosed with sacroiliac joint syndrome and investigate the effectiveness. The subjects of this study are patients who have been diagnosed with sacroiliac joint syndrome through tests like X-ray in S Orthopedics in C City and have had chronic lumbar pain for more than 6 months and the before and after results about subjective pain degree through three dimension Moire Muscle Body Type Tester and subjective pain degree through VAS Pain Awareness after sling lumbar stabilization exercise 3 times a week, 30 minutes a time, total 24 times for 8 weeks have revealed the following: The change of muscle body type has been comprehensively improved in the statistics before and after the exercise and the subjective pain degree has also comprehensively decreased in the statistics. Therefore, sling lumbar stabilization exercise is proved to give positive affect to muscle body type and pain improvement of the patients with sacroiliac joint syndrome.

• Korean Journal of Applied Biomechanics
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• v.13 no.1
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• pp.1-12
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• 2003

The purpose of this study was to design the method of 3D space calibration to reduce RMSE by statistical analysis when using the DLT algorithm and control frame. Control frame for 3D space calibration was consist of $1{\times}3{\times}2m$ and 162 contort points adhere to it. For calculate of 3D coordination used two methods about 2D coordination on image frame, 2D coordinate on each image frame and mean coordination. The methods of statistical analysis used one-way ANOVA and T-test. Significant level was ${\alpha}=.05$. The compose of methods for reduce RMSE were as follow. 1. Use the control frame composed of 24-44 control points arranged equally. 2. When photographing, locate control frame to center of image plane(image frame) o. use the lens of a few distortion. 3. When calculate of 3D coordination, use mean of 2D coordinate obtainable from all image frames.

• 한국노년학
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• v.29 no.3
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• pp.899-915
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• 2009

The purpose of this study was examined effect of physical fitness and exercise participation on healthy aging of the elderly. The subjecrts were a total 319 people that they were participate in the regular exercise, and go to welfare center in Seoul. Data were collected during the period from November 1 to November 30, 2006. The collected data were analyzed frequency, descriptive statistics, correlation and hierarchical regression analysis using the SPSS-Win 12.0 program. The results of hierarchical regression analysis were appeared as follows. According to the results of hierarchical regression analysis, significant factors influencing healthy aging were monthly income, monthly pocket money, self-perceived health status, leg muscle strength, exercise behavior and period of exercise. 2. According to the results, significant factors influencing physiological health were age, marital status, self-perceived health status, exercise behavior and period of exercise. 3. According to the results, significant factors influencing cognitive-mental health were monthly income, monthly pocket money, self-perceived health status, leg muscle strength, exercise behavior and period of exercise. 4. According to the results, significant factors influencing social-support health were monthly income, age, education, self-perceived health status, leg muscle strength, exercise behavior and period of exercise. In conclusion, First, this questionnaire demonstrates good reliability and validity and therefore it is an appropriate measurement of healthy aging for the elderly in Korea. Second, it is important that exercise behavior is main factor to healthy aging life on the elderly. Third, There is important mean values of the items for healthy aging.

• Korean Journal of Applied Biomechanics
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• v.21 no.1
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• pp.97-105
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• 2011

The purpose of this study was to investigate the kinetic factors of Stefan holm's take-off motion and provide the technical data. Collected data of the subject(height: 181 cm, weight: 71 kg, record: 230 cm) were used for the last two strides and take-off phase. The results were as follows: The vertical impulse force was 2044.8 N which was 2.49 times and the anterior-posterior impulse force was -1306.4 N which was 1.88 times of the subject's weight. The take-off leg angular velocities($\omega_x,\;\omega_y$) were switched drastically from clockwise to count clockwise direction between two-step touchdown and take-off. The highest jerk of the take-off foot was 368.97 m/s3 during the two step take-off and the take-off foot made an impact to the ground with 1225.07 m/s3 during the one step touchdown.

• Journal of Nutrition and Health
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• v.36 no.7
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• pp.711-719
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• 2003

The effects of taurine, carnitine or glutamine supplementation on endurance exercise performance along with related fatigue factors were evaluated in male college students in the Department of Physical Education, who's maximal oxygen consumption rates (VO$_2$max) were equivalent to those of endurance athletes. Twenty four subjects were randomly divided into 4 groups (n=6), and given placebo, taurine (4 g/day), carnitine (4 g/day), or glutamine (4 g/day) tablets for 2 weeks. Subjects could run 6.9 min or 9.0 min longer until exhausted on a treadmill at the intensity of 75% VO$_2$max following taurine or camitine supplementation for 2 weeks, respectively, compared to the value measured prior to each supplementation. Glutamine or placebo supplementation did not improve the endurance exercise performance based on the running time until exhausted on a treadmill. Serum lactate concentrations measured 1 hr after the initiation of the endurance exercise, as well as at all-out state tended to be decreased by taurine, carnitine, or glutamine supplementation, and were significantly lowered (43% decrease) by carnitine supplementation (p < 0.05). Taurine supplementation significantly reduced the serum inorganic phosphorus concentration measured at all-out state (14% decrease, p < 0.05), while carnitine supplementation significantly lowered the resting state serum inorganic phosphorus level (20% decrease, p < 0.05). Taurine (32% reduction) or carnitine (23% reduction) supplementation significantly decreased serum ammonia concentration measured at all-out state (p < 0.05). From these results, 4 g/day of taurine or carnitine supplementation appears to improve the endurance exercise performance and related human fatigue factors.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.619-624
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• 2018

The purpose of this study was to examine the trend of men's gymnastics on floor exercise final(8 gymnasts) in the 2018 Asian Games through digital video materials. Video recordings of floor exercise final were collected from the 2018 Asian Games. The cross-check with three international gymnastics judges on floor exercise final was analyzed. To fulfil the D-score, 8 gymnasts were the most performed backward saltos elements group(36 elements), forward salto with 1/1 turn(8 gymnasts), backward salto with 5/2 turn(8 gymnasts) and backward salto with 3/1 turn(8 gymnasts). The scores showd average the D score 6.0, E score 7.9, and connection values 0.25. To get a good results on floor exercise, gymnasts need to get a average the D score over 6.0, E score over 8.5, and connection values over 0.3.

• Journal of the Korea Computer Graphics Society
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• v.3 no.1
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• pp.57-67
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• 1997

The navigation of virtual space comes down to the manipulation of the virtual camera. The movement of the virtual cameras has 6 degrees of freedom. However, input devices such as mouses and joysticks are 2D. So, the movement of the camera that corresponds to the input device is 2D movement at the given moment. Therefore, the 3D movement of the camera can be implemented by means of the combination of 2D and 1D movements of the camera. Many of the virtual space navigation browser use several navigation modes to solve this problem. But, the criteria for distinguishing different modes are not clear, somed of the manipulations in each mode are repeated in other modes, and the kinesthetic correspondence of the input devices is often confusing. Hence the user has difficulty in making correct decisions when navigating the virtual space. To solve this problem, we use a single navigation metaphore in which different modes are organically integrated. In this paper we propose a helicopter pilot metaphor. Using the helicopter pilot metaphore means that the user navigates the virtual space like a pilot of a helicopter flying in space. In this paper, we distinguished six 2D movement spaces of the helicopter: (1) the movement on the horizontal plane, (2) the movement on the vertical plane,k (3) the pitch and yaw rotations about the current position, (4) the roll and pitch rotations about the current position, (5) the horizontal and vertical turning, and (6) the rotation about the target object. The six 3D movement spaces are visualized and displayed as a sequence of auxiliary windows. The user can select the desired movement space simply by jumping from one window to another. The user can select the desired movement by looking at the displaced 2D movement spaces. The movement of the camera in each movement space is controlled by the usual movements of the joystick.

• Journal of the Korean Applied Science and Technology
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• v.39 no.2
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• pp.324-334
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• 2022

In this study, to analyze the relationship between exercise satisfaction and exercise continuity that occurs in the interaction between leaders and participants, non-probability sampling was performed on 232 individuals from January 17 to March 9, 2022, and a structural model of 187 effective samples was used. applied and analyzed. First, the reliability and intimacy of Pilates leader-participants were found to have a significant effect on exercise satisfaction. Second, significant results were derived between Pilates exercise satisfaction and exercise continuity. Third, Pilates reliability was found to have a significant effect on exercise continuity, but intimacy was partially adopted as not having a significant effect on exercise continuity. However, the indirect effect between the mediating effects of exercise satisfaction can be seen to be statistically significant, and it can be predicted that Pilates causes positive behavior in exercise satisfaction and further reduces avoidance or indirectly affects other exercises. In addition, these performances are considered to have an impact on business performance as well as mutual relationships.

• The Journal of Dong Guk Oriental Medicine
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• v.7 no.1
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• pp.99-117
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• 1998

Objective This experimental study was designed to investigate effects of Bo-joong-ik-gi-tang administration among long distance runners on changes of the energy and electrolyte metabolism. Materials and Methods All subjects were divided randomly with two groups, Bo-joong-ik-gi-tang Group (N=4) and control group (N=4) and performed to run the 400m track with 70% of HR max about 1 hour. The blood samples were collected from antecubital vein by 5ml syringes at before exercise, immediately after exercise, recovering-10 min. recovering-30 min, recovering-1 hour. These samples were used to analyze for the factors of the change on metabolic responses. First, the primary factors on the changes of the energy metabolism were checked ; Glucose, Free fatty acid, Lactate, LDH. Second, the primary factors on the changes of the electrolyte metabolism were checked ; Na+, CI-. K+. Results 1. The change of the energy metabolism 1) Glucose response was not shown significant difference between two groups. 2) Free fatty acid response in Bo-joong-ik-gi -tang group was significantly increased at recover-10 min. 3) Lactate response in Bo-joong-ik-gi-tang group was significantly decreased at immediately after exercise, recover-10 min, recover-30 min. 4) LDH response was not shown significant difference between two groups. 2. The change of the electrolyte metabolism 1) Na+ response in Bo-joong-ik-gi-tang group was shown significant difference between two groups at before exercise. 2) Cl- response in Bo-joong-ik-gi-tang group was significantly increased at before exercise, immediately after exercise. 3) K+ response in Bo-joong-ik-gi-tang group was significantly increased at recover-10 min. Conclusion According to the above results, it was shown that Bo-joong-ik-gi-tang had the positive effects on changes of the energy and electrolyte metabolism for the long distance runners.

• Journal of Korean Physical Therapy Science
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• v.5 no.3
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• pp.675-689
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• 1998

The purpose of this study was to determine the efficient way of stretching technique from three methods, and of stretching duration and frequency. Sretching is known to improve musculotendinous flexibility and joint suppleness, and employed in many warm-up routines during physical activities and athletic performances. The benefits and the rationale of stretching have been reviewed. Many authors agree that, for the best results, static stretching has to be held for approximately 30 sec. in a trial, three trials in a session, at least three times a week for four weeks. Further clinical studies are required for elucidating more informations on this subject.