• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.239-244
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• 2019

The purpose of this study was to determine the correlation between upper limb muscle power and bat swing speed in elementary school baseball players. This study subjects were 32 subjects. Upper extremity muscle strength was measured in the Both Shoulder joints extensor flexor abductor adductor, Both elbow joints extensor flexor and bat swing speed. The correlation between upper extremity muscle strength and bat swing speed was analyzed using pearson's correlation analysis. There was a significant correlation between dominant upper extremity muscle strength and bat swing speed in the order of shoulder adductor, shoulder abductor, elbow flexor, and shoulder flexor and in correlation between non-dominant upper extremity muscle strength and bat swing speed in the order of shoulder adductor, elbow flexor, shoulder abductor, shoulder extensor, elbow extensor, and shoulder flexor. From these results, it can be seen that the stronger the upper extremity muscle strength, the bat swing speed is the more positive correlation.

• Journal of the Korea Convergence Society
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• v.12 no.8
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• pp.61-66
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• 2021

The purpose of this study was to investigate the relationship between vertical jump and lower extremity muscle strength of elementary school baseball players. This study subjects were conducted with a total of 40 subjects. Vertical jump was measured using a vertical jump gauge, and a hand held dynamometer was used to measure lower extremity muscle strength. For the measurement of lower extremity muscle strength, flexion·extension·adduction·abduction·internal rotaiton·external rotation of both hip joint, flexion·extension of both knee joint, dorsi flexion·plantar flexion of both ankle joint were measured. pearson's correlation analysis was used to analyze the correlation between vertical jump and lower extremity muscle strength. From these results, it was found that the stronger the leg muscles except for the plantar flexion, the higher the vertical jump was, indicating a positive correlation. In future studies, follow-up studies on the relationship between batting ability and vertical jump & lower extremity muscle strength are needed.

• Journal of Convergence for Information Technology
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• v.9 no.7
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• pp.153-158
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• 2019

The purpose of this study was to compare the isokinetic muscular strength of the knee joint between female volleyball and table tennis players. A total of 27 elite volleyball players and 27 table tennis players participated in the study. This study measured both knee extensor and flexor strengths of volleyball and table tennis players using the isokinetic dynamic test. Peak torque was measured by performing maximal voluntary flexion and extension three times at $60^{\circ}/s$. Volleyball players had higher knee extensor and flexor strengths than table tennis players. No significant difference in both knee strengths was noted in table tennis players. However, volleyball players showed significant differences in both knee strengths. Height and weight showed a positive correlation with knee strength. This study found that volleyball players had greater knee strength than that of table tennis players. We also found that volleyball players have asymmetrical knee strength. Comparison with other sport players is warranted to better understand isokinetic muscular strength of the knee joint.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.598-601
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• 2017

The purpose of this study is to evaluate the effects of Ankle Exercise Program on Muscle Strength and Balance in Middle Aged Woman. Subjects of this study, among the patients who were diagnosed with obesity in the study, for patients total of 8 people have agreed to research. Experimental group 4 people, control group 4 people, was a total of 8 people. Group-specific arbitration method, was applied to Unstable supporting surface exercise program(experimental group) and stable supporting surface exercise program(control group). Each training courses 30 minutes for 6 weeks, examined the changes in Functional Reach Test(FRT) and One Leg Standing(OLST), Dorsi Flexion(DF) and Plantar Flexion(PF) ability to examine a total of 6-week course effectively. The intervention were compared by measuring before and after. There were significant improvements in the subscales of the muscle strength and balance test of those who practiced with the unstable supporting surface exercsie program, while the control group showed no significant changes. Therefore, unstable supporting surface exercsie program is effective in improvement of to improve the muscle strength and balance in woman with obesity.

• Journal of Industrial Convergence
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• v.18 no.1
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• pp.59-64
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• 2020

The effect of kinesio taping in patients with common peroneal nerve paralysis (PNP) have not been investigated. This purpose of this study was to evaluate the effects of kinesio taping on patients with common PNP. Ten subjects who had common PNP were included in this study. Kinesio taping was applied to the ankle joint (direction of dorsiflexion and eversion). The measurements were by manual muscle test (MMT; tibialis anterior, peroneus longus), active ROM (ankle dorsiflexion, eversion), pain (visual analogue scale (VAS), pressure pain threshold (PPT)), and balance (one leg standing). Subjects were assessed at baseline and 8 weeks of intervention. In the results, all subjects showed improvements in MMT, active ROM, Pain and balance at the 8-week. These findings are considered to be effective in applying kinesio taping on ankle joint in common PNP patients.

• Journal of Digital Convergence
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• v.17 no.3
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• pp.463-471
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• 2019

The purpose of this study was to investigate the effect of muscle imbalance on motion of back squat. The isokinetic muscle strength of the 8 subjects was recorded for the knee flexion/extension by the cybex 770 dynamometer. Each subject performed 3 back squats with the long barbell with an intensity of 25% body weight(BW), 50%BW, 100%BW, 125%BW. During the back squat through the recorded kinematic data the subjects' maximum flexion and extension knee angle, center of mass displacement and V-COP were calculated for evaluation of the stability of the movement. For the statistical analysis independent t-test was used. Knee flexion angle and COM displacement are dominated by the reciprocal muscle ratio. V-COP factor was dominated by bilateral extension deficit. Based on the results we can know that as the intensity of the squat increased to a level control was difficult because the muscles' imbalance influenced the movement.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.7
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• pp.4395-4403
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• 2014

The purpose of study was to compare the effectiveness of sling exercise on the muscle strength and range of motion in female patients who received a total knee replacement. The participants were allocated randomly into 2 groups: sling exercise group (n=15) and control group (n=15). The subjects were evaluated using the Biodex system for the muscle strength test and a goniometer for the range of motion test. The data was analyzed using a paired t-test and independent t-test to determine the statistical significance. As a result, the sling exercise group before and after intervention showed a statistical significance difference in the flexion angle, quadriceps femoris, and hamstring muscle strength. The control group before and after the intervention revealed a statistically significant increase in the flexion & extension angle, quadriceps femoris, and hamstring muscle strength. Muscle strength test and flexion range of motion test in the sling exercise group showed statistical significance differences compared to the control group (p<.05). Therefore, the sling exercise group has a positive influence on the muscle strength and ROM in patients with a total knee replacement.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.37-44
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• 2016

The aim of the present study was to compare the strength, balance, and flexibility across two age groups (older adults vs. young adults). The isokinetic muscle function, ankle ROM, trunk forward flexibility, stability, and antropometric data for the elderly and 46 university students were collected. The results indicated that male older adults possessed relatively low flexibility (2.97cm) among the groups and showed better stability in the right foot than in the left foot and $35^{\circ}$ of plantar flexion ROM, which was not in the normal range. Their peak strength at the knee joint was below 50% of their counterpart. They revealed a hamstring deficit of 18.55%, ankle eversion deficit of 23.08%, and ankle inversion deficit of 19.19%. The results indicated that female older adults possessed comparable flexibility compared to female young adults. The reciprocal muscle strength ratio of both knees was under 50%, and the deficit was 14.32% (extension) and 19.73% (flexion). The ankle plantar flexion peak torque was approximately 62% (left) and 73% (right) of WS's. The ankle dorsi flexion deficit was 25.05% and the plantar flexion was 26.86%. The eversion deficit was 19.97% and the inversion was 21.09%. These results will be significant in establishing an elderly fitness enhancement program and policy.

• Journal of the Korea Convergence Society
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• v.8 no.1
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• pp.77-87
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• 2017

The purpose of This study was to compare the effect of Convergence-Based russian current(RC) and transcutaneous electrical nerve stimulation(TENS) on pain, muscle strength, function of knee who had a surgical anterior cruciate ligament reconstruction(ACLR). A total of 40 Participants divided into 2 groups, with ACLR, were assigned to russian current group(RCG) or transcutaneous electrical nerve stimulation group(TENSG). Both groups were measured by varieties of tests: visual analog scale(VAS), knee flexion & extension muscle strength, knee injury and osteoarthritis outcome score(KOOS), korean lower extremity functional scale(LEFS). Both groups has shown significant changes within the measurements of VAS, Knee Flexion & Extension muscle strength, KOOS and LEFS. The RCG had more significant increase within knee extension muscle strength, LEFS compared to TENSG. By studying this research, both interventions were effective to ACLR patients, moreover, RC was more effective for knee muscle strength and lower extremity function than the TENS.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.235-238
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• 2017

소방 구급 업무는 매년 증가 추세에 있으며, 119 구급대원의 부상은 들것으로 과체중의 환자 이송 및 구출 작업 시 급격한 힘을 사용할 때 나타나며 환자 운반 시 몸통의 비틀림 및 체간의 굽힘 등 부적절한 자세로 인하여 근 골격계 질환 및 부상의 발생 가능성이 높은 것으로 보고되고 있다. 미국 응급구조사에서는 47%가 허리 부상의 경험을 말했으며 구급대원들의 요통을 예방할 수 있는 방법적인면의 중재가 부족한 실정이다. 따라서 119 구급대원의 근골격 질환자에게 테이핑을 이용하여 실제 작업 현장에서 많이 사용되는 환자 이송에 따른 허리 통증 시 통증에 따른 근활성도에 어떠한 영향을 미치는지 알아보기 위하여 연구가 실시되었다.