• Korean Journal of Applied Biomechanics
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• v.34 no.1
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• pp.9-17
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• 2024

Objective: The purpose of this study is to apply 8-week velocity-based training to domestic professional athletes and the kinematic and kinetic analysis of the 1-RM improvement of back squat and power clean, which can represent strength-power ability, to verify the effectiveness of velocity-based training in Korea and to establish a basic basis. Method: The subjects who participated in this study were 10 professional athletes from K University (age: 21.40 ± 0.97 yrs., height: 179.90 ± 3.54 cm., body mass: 71.298 ± 2.98 kg). All subjects performed back squat and power clean 1-RM before and after 8-weeks of velocity-based training. A 3-dimensional motion analysis with 8 infrared cameras and 4 channels of EMG was performed in this study. A paired t-test was used for statistical verification. The significant level was set at α=.05. Results: Both Back squat and Power Clean 1-RM showed statistically significant increases (p<.05). In the case of back squat, there was no statistically significant difference in both kinematic and kinetic variables (p>.05). In the case of Power Clean, only the quadriceps of Phase 1 showed a statistically significant decrease (p<.05). Conclusion: Domestic professional athletes can improve their strength-power ability through velocity-based training, and such training for at least 8-weeks is considered a way to improve their performance.

• Korean Journal of Oriental Medicine
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• v.3 no.1
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• pp.289-319
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• 1997

Non-medical use of drugs to enhance performance at Olympic Games by athletes has been prohibited by the International Olympic Committee(IOC) since 1968 on medical and ethical grounds. IOC wants to protect athlete from harmful side effect of drugs due to misuse of it. It also, ethically, wants to have Games run on fair base, not fortified by performance enhancing drugs, The banned substances include stimulants, narcotic analgesics, anabolic sterolds, ${\beta}-blockers$ and diuretics. In order to prevent the positive reaction in the doping test induced by herb medicine, this study was done on about Bojungchisheup-tang. The laboratory set up doping analyses methods to cover as many drugs as possible without sacrificing sensitivity and specificity within one procedure. Its screening method consisted of four different procedures. The results were negative. According to the above results, Bojungchisheup-tang taken by athletes would show the negative reaction in the doping test. So its prescription for athletes can be given without worries of the doping test.

• Korean Journal of Applied Biomechanics
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• v.14 no.1
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• pp.41-50
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• 2004

The objective of the study is to analyze the myoelectrical activity involved in performing the Swallow movement, a D-level technique, in order to use it as the basic research data in helping train gymnasts in how to perform strength-related techniques. To this end, four national representative athletes who participated in the 2002 Busan Asian Games were selected. The results of the comparison analysis of the individual models are summarized as follows. 1) The results of the E.M.G analysis showed that during the Swallow movement, the myoelectrical activity was detected higher in pectorialis major muscle and bicep brachii muscle than in trapezius muscle and deltoid muscle. 2) The results of the E.M.G analysis showed that during the Swallow movement, the myoelectrical activity was measured high in triceps brachii muscle and palmaris longus muscle, while the myoelectrical activity was recorded low in latissimus dorsi muscle and rectus abdominis muscle. 3) In performing the Swallow in the rings, the mean average (%) was found high in the order of erector spinae, pectorialis major muscle, palmaris longus muscle, triceps brachii muscle, deltoid muscle, latissimus dorsi muscle, and trapezius muscle. All taken together, the athletes showed a difference in the distribution of the muscles during the performance of the Swallow. The muscle that showed a constant distribution among the athletes was pectoralis major muscle, which proves that for a stable performance, it is ideal to increase the myoelectrical activity in pectoralis major muscle.

• Journal of Fashion Business
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• v.25 no.2
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• pp.127-142
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• 2021

This study aims to organize the prototype design method of compression wear for women professional soccer players. Despite the excellent performance of female soccer players in world competition, most functional wear has been developed mainly for men, so professional female athletes have fewer choices. Soccer is a sport requiring core and lower body muscle strength, and muscular endurance for long periods of playing or walking on the field. Female soccer players did not differ much in upper body compared to other women, but their lower body had a smaller hip circumference than waist circumference and a larger thigh circumference, requiring compilation considering the physical characteristics and movement of athletes. Female soccer players wear sports bras while playing but regular bras and compression wear during normal exercise because they sweat on under their breast, which irritates sensitive skin. For core muscles in the upper body and to support for thigh and hip muscles in the lower body, the uniform in this study was designed by reducing the body size of a professional female soccer player in her 20s and the actual measurements of commercial compilation software to 81% of the chest circumference, 95% of the waist circumference, and 78% of the hip circumference. The design experiment in this study was a simple exercise and did not produce produce results for long-term exercise and performance improvement, but can be used to design a composition pattern system for other professional female athletes.

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2003.05a
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• pp.176-176
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• 2003

In the previous studies, some genetic polymorphisms in the human mitochondrial DNA have been associated with athletic performance in several populations. To investigate the relationship between mitochondrial DNA 5178A/C polymorphism and athletic performance in Korean population, blood samples were collected from 100 male Korean elite athletes and 64 sedentary controls. There was no significant difference in allele frequency of mitochondrial DNA 5178A/C polymorphism between two groups (P > 0.05). However, 5178A allele frequency in Korean population was very higher than those in other populations studied. Because it has been reported that this genetic polymorphisms is associated with longevity, further study will be needed to clarify the relationship between this genetic polymorphism and life expectancy of Korean population.

• The Journal of the Convergence on Culture Technology
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• v.8 no.3
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• pp.331-337
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• 2022

This study is to investigate the effect of Chinese university track and field athletes on their athletic commitment and performance. The men and women aged 19 or older were selected as a population for athletes from Hanam University, Jeongju University, and Hanam Normal University, and 1400 questionnaires were distributed using the Convenience sampling method. The results obtained by performing data processing are as follows. First, all factors had a statistically significant effect on performance in the effect of sub-factors of exercise commitment (cognitive commitment, behavioral commitment). Second, all factors had a statistically significant effect on the performance of the sub-factors of exercise commitment (cognitive commitment, behavioral commitment). Third, all factors had a statistically significant effect on the effect of sub-factors of exercise commitment (cognitive commitment, behavioral commitment) on concentration.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.2
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• pp.537-545
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• 2015

The purpose of this study is to investigate how effects creatine dosage has on the improvement of rowing athletes' performance ability. Rowing athletes were administered with creatine, through which to examine the change of athletic performance ability, blood fatigue substances, and muscular activity. The subjects (participants) of this Study consisted of 12 male rowing athletes at P University, with at least 5 years of rowing experiences, which divided into two groups - creatine dosing group of 6 persons and control group of 6 persons - for random sampling measurement. Enzymatic-colorimetric method using lacrate oxidase and 4-aminoantipyrine was performed for blood lactate level analysis, and wireless EMG system (QEMG-4: Lxtha Korea) for muscular activity analysis, with 4 channels set for data analysis. As body parts to be measured, two muscular parts - latissimus dorsi and lumbar spinel - were chosen. Then, on the 5th day from the date of administering them with creatine (that is, 4 days after dosing them with creatine), rowing movement with the highest level of activity was calculated as peak value, which was measured twice. The test data used for this Study were SPSS/PC 18.0, pre-movement and post-movement two-way ANOVA for repeated measurement for comparative analysis of each muscle, with significant level at .05. As a result, the change of blood lactate level was significantly higher in creatine dosing group than in non-dosing group (p<.05). As for the change of muscular activity, both latissimus dorsi and lumbar spinel showed a significantly higher change of muscle in creatine dosing group than in non-dosing group (p<.05 and p<.05, respectively).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.10
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• pp.4445-4452
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• 2012

This study examined the relationship between an achievement goal orientation and self-management in track & field athletes' of physical education high schools. Moreover, we hypothesized that the achievement goal orientation and self-management would be differed by their gender, special field, and career. Participants were 229 athletes. They completed achievement goal orientation and self-management questionnaires independently. Results from each statistical method based on the research questions revealed that there was a statistical difference in the subject goal orientation(p<0.05). Gender had a significant effect on the interpersonal, mental strength, and the body management(p<0.05). The mental strength was only statistically affected by their special field. The results indicated that the achievement goal orientation and the self-management may affect performance of high school track & field athletes. Several limitations, implications and suggestions for the future study were discussed.

• Korean Journal of Applied Biomechanics
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• v.27 no.3
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• pp.219-227
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• 2017

Objective: The aim of this study was to analyze the effects of bobsleigh shoes on the lower extremity range of motion and start speed lap time and to develop bobsleigh shoes suitable for winter environments and Korean players based on sports science and optimized biomechanical performance. Background: The bobsleigh shoes used in the start section of the sport are one of the most important equipment for improving athletes' performances. Despite the importance of the start section, there are no shoes that are specifically designed for Korean bobsleigh athletes. Thus, Korean athletes have to wear sprint spike shoes instead of bobsleigh shoes to practice the start. Method: The subjects included four bobsleigh athletes from the Gangwon Province Bobsleigh Skeleton Federation. The study selected the bobsleigh shoe type A (company A) and type B (company B). We analyzed the lower extremity range of motion and sprint time (start line to 10 m) using a Motion Analysis System (USA). Results: In the measurement of the time required for the bobsleigh start section (10 m), the type A shoes demonstrated the fastest section record by $2.765{\pm}0.086sec$ and yielded more efficient movements, hip and knee flexion, hip extension, ankle dorsiflexion, plantar flexion, and inversion than the type B shoes. Conclusion: Type A shoes can yield a better performance via effective lower extremity movements in the bobsleigh start section. Application: In the future, functional analysis should be conducted by comparing the upper material properties, comfort, and muscle fatigue of bobsleigh shoes based on the Type A shoes to develop such shoes suitable for Koreans.

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