• Journal of Korea Society of Industrial Information Systems
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• v.3 no.1
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• pp.93-100
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• 1998

인력운반작업(Manual Materials Handling)에 의해 초래되는 요통의 발생을 줄이기 위해서 작업설계부터 작업부하량에 영향을 미치는 요인들에 대한 과학적이고 체계적인 고려가 이루어진 분석방법이 도입되어야 할 필요성이 크다고 하겠으며 이를위하여 우선 최대근력의 측정과 평가가 선행되어야만 될 것이다. 따라서 신체적인 특성과 각 근력의 상호관계가 분석·고찰되었으며 최대근력을 실험적으로 측정하여 평가하였다.

• Physical Therapy Korea
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• v.10 no.4
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• pp.1-15
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• 2003

본 연구는 슬관전 신전 직전에 수행된 선행 슬관절 굴곡이 슬관절 신전근의 최대 근력발생 및 근육 활성도(activation)에 미치는 영향을 알아보기 위하여 실시되었다. 16명의 정상인이 Cybex II 등속운동기구에서 3가지 다른 운동 속도($100^{\circ}/s$, $200^{\circ}/s$, $300^{\circ}/s$)와 2가지 다른 근육 활성 조건(선행부하가 없는 조건과 선행부하 조건)에서 슬관절의 최대 신전을 수행하였다. 연구대상자들에게 선행부하 없는 조건에서는 $90^{\circ}$ 슬관절 굴곡 상태에서 $0^{\circ}$까지 최대 신전을 수행하도록 하였고, 선행부하 조건에서는 구심성 슬와부 근육의 구심성 수축으로 $0^{\circ}$에서 $110^{\circ}$까지 굴곡한 후, 다시 $0^{\circ}$까지 최대 신전을 하도록 요구하였다. 종속변인으로는 내측광근과 외측광근의 최대 근전도와 최대 신전근력을 측정하였다. 실험 결과 최대 근전도와 최대 근력 모두 선행부하 조건에서 높게 나타났으며, 운동 속도가 증가함에 따라 최대 근력은 감소하는 전형적인 최대 근력-운동속도 상관법칙이 본 실험에서도 나타났다. 또한 운동속도와 전환속도 간의 간섭이 없는 것으로 나타나, 슬관절 신전근에 선행부하(preloading)를 가하는 것이 최대 근력-운동속도 상관법칙(force-velocity relation)에 영향을 미치지 못하는 것으로 해석되었다. 선행부하로 인해 증가된 최대 근력 및 근 활성도의 증가는 주로 신경촉진에 의한 것으로 해석된다.

• Proceedings of the ESK Conference
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• 1997.10a
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• pp.31-34
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• 1997

본 연구에서는 들기 작업 중 특히 2인이 행하는 들기 과업시 신장과 근력의 차이가 작 업 능력에 어떠한 영향을 미치는가를 실험을 통해 심리육체적(Physchophysical approach)/ 생리학적(Physiological approach)으로 분석하였다. 실험은 건설 현장 작업의 Form 들기 작업을 시뮬레이션하였다. 남자 대학생 14명을 대상으로 2인 작업팀을 신장/근력 차이가 있는 팀과 비슷 한 신장/근력 팀으로 설정된 기준에 따라 나누었고 20분간 심리육체적인 실험을 통해 이 두 그룹간 의 최대 허용 하중 (Maximum Acceptable Weight of Load, MAWL)과 생리적인 부하(Load)의 차이를 측정하였다. 생리적 부하는 K4를 신장과 관계없이 근력이 약한 피실험자에게 착용케하여 심박수와 에너지 소비량을 산출하여 두 그룹을 비교하였다. 실험 결과 최대 허용하중의 경우 다른 신장/근력 팀에 분당 2회의 빈도의 경우 각각 16.2kg, 14.0kg, 분당 4회의 경우 각각 12.6kg, 10.6kg으로 비슷 한 신장/근력 팀의 경우가 다른 신장/근력 팀의 경우보다 높은 최대 허용 하중을 보였고, 에너지 소 비량은 다른 신장/근력 팀과 비슷한 신장/근력 팀에 대해 분당 2회의 경우 각각 6.01 kal/분, 5.82 Kal/분, 분당 4회의 경우 각각 7.81 kal/분, 7.43 kal/분, 심박수는 분당 2회의 경우 98.62(회/분), 94.60(회/분), 분당 4회의 경우 122.00(회/분), 117.43(회/분), 으로 다른 신장/근력 팀의 경우가 비슷한 신장/근력 팀의 경우보다 높은 에너지 소비량과 심박수를 보였다.

• The Journal of the Korea Contents Association
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• v.6 no.12
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• pp.226-234
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• 2006

The aim of this study were to evaluate the effect of kinesio taping on isokinetic muscular function and pain of knee joint. The subjects for this study were twelve elderly women($65{\sim}70$years) suffered by knee joint pain over more than three years. The taping methods performed on 3 times a week for 8 weeks for improvement of isokinetic muscular function. Also, the change of visual analogue scale(VSA) and varval rating scale(VRA) has been measured before and post taping 8 weeks. Paired t-test was performed for data analysis at the 0.05 level of significance. After 8 weeks, the results of the study are as follow; First, peak torque, peak torque % BW, total work and ipsilateral balance ratio were significantly improved. And, work fatigue, visual analogue scale and verval rating scale were decreased significantly after 8 weeks taping. The results suggest that applying kinesio taping on knee joint may improve isokinetic muscular function of elderly women. Therefore kinesio taping method was effective for pain relief and prevention of knee joint pain in the elderly women.

• Journal of Yeungnam Medical Science
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• v.14 no.1
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• pp.101-110
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• 1997

The maximal voluntary strength of knee extension and flexion on both the right and left sides was measured in patients with hemiparesis of upper motor neuron type and in a group of normal subjects. Significant differences of maximal voluntary strength were found between male and female but the ratio of flexor to extensor strength did not vary significantly between the sides, between the sex in normal subjects. The maximal voluntary strength of uninvolved side were not reduced significantly but involved side reduced significantly in patients. The ratio of flexor to extensor strength in hemiparetic side was significantly less than the ratio for the normal subjects but not significant difference in uninvolved side of patients. According to the above results, the maximal voluntary strength of flexion was more reduced than that of the extension in lower extremity of hemiparesis patients. The strength ratio of flexion to extension was a useful parameter for guiding the rehabilitation of hemiparesis.

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.423-432
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• 2018

The purpose of this study was to investigate the differences in upper and lower strengths and symmetry between upper body injury group, lower body injury group and non-injury group of bowling athletes. The subjects were the upper body injury group (UG), n = 16, the low body injury group (LG), n = 8, the non injury group, [NG], n = 15). The isometric strength of the bowler was measured using Manual Muscle Tester 01165 (Lafayette Instrument Company, USA) and the symmetry index (SI) was calculated. The results were as follow. The symmetry index of hip extension strength and hip external rotation strength was statistically larger in NG than LG (p <.05). The above results suggest that lower body strength and bilateral symmetry was closely related to injuries of the lower body. In order to prevent injury of the bowler, strengthening of lower body strength and symmetrical training 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.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.12 no.1
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• pp.53-62
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• 2018

In this study, we developed a smart 1RM system for national health management and physical fitness, which enables quantitative 1RM measurement in various types of exercise using digital pulley technology, and to test the effect on training by using it. We developed the smart 1RM system, which is composed of portable muscle strength measuring device, Bluetooth communication based mobile phone data transmission and circuit diagram, and height adjustable system body. We recruited the 30 participants with 20th aged and divided into training and non-performing groups with 15 participants randomly. The participants performed 5 sets of elbow, lumbar, knee extension / flexion 10 times using smart 1RM system and the experimental period was 3 days a week for a total of 8 weeks. The experimental results showed that the maximum strength of the elbow, lumbar, and knee joints was significantly improved before and after maximal muscle strength training in the training group. Oxygen intakes during 1RM exercise mode showed 10.91% than endurance. To verify the validity of the smart 1RM maximal strength data, the reliability was 0.895 (* p <0.00). This study can be applied to the early rehabilitation treatment of the elderly and rehabilitation patients more quantitatively using the national health care.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.7 no.2
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• pp.101-107
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• 2013

In this paper, we were to investigate effect of correction to muscle imbalance in lower limbs according to reduction of weight bearing methods of four point of horizontal shaft using two-belt treadmill. Participants were divided to two group according to each ten peoples who have difference of muscle function in left and right legs over 20%. Experiment progressed forty minutes a day three days a week, total four weeks and we estimated the maximal peak torque and average power for testing joint torque in hip, knee and ankle. The results showed that the correction effect of muscle imbalance to the maximal muscle strength was the most effective in hip joint. Also in knee joint, correction effect of muscular reaction was the most effective too. We thought that reduction of weight bearing methods could be positive effect to correct muscle imbalance in lower limbs.

• Journal of the Korean Data and Information Science Society
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• v.21 no.1
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• pp.33-42
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• 2010

The purpose of this study was to identify cervical stabilized exercise and joint mobilization, the difference between them, and the maximum muscle strength and static muscle endurance of each group after the enforcement to general people. Cervical joint mobilization group refers to interarticular exercise (traction, pressure, glide) using with Kaltenborn technique. 3 classes were divided into 20 people each, cervical joint mobilization and stabilized exercise, and the comparison groups were randomized for the study. Both cervical stabilized exercise and joint mobilization increased maximum muscle strength and static muscle endurance. Patients should be able improve muscle stabilization and deep cervical muscle by using joint mobilization when the patient is unable to exercise on their own.