• 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.

• The Journal of the Korea Contents Association
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• v.20 no.6
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• pp.114-123
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• 2020

The purpose of this study was to determine the effect of lower extremity strengthening program on balance, gait and upper limb function in patients with stroke. This study was a hospital-based with Central nerve system lesion patients, randomized controlled trial with a blinded assessor. Twenty four hemiparetic stroke patients were divided into two groups: a Lower extremity strengthening program group (LESPG)(n=12) and a Treadmill training group (TTG)(n=12). The LESPG performed a Lower extremity strengthening program on the affected side. The TTG exercised on a treadmill for 30 minutes a day. Assessment tools included the Timed Up and Go test (TUG), the Functional Gait Assessment (FGA) and the Manual Function Test (MFT). There was a significant difference in TUG, FGA, and MFT scores between the two groups in the LESPG for the balance, gait, and upper limb function than for the TTG(p<.01). Results of the present study indicated that the effect of lower extremity strengthening program for 4 weeks had an effect on balance, gait and upper limb function of hemiplegic patients after stroke.

• 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.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.421-427
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• 2022

This study was to examine the effect of lower extremity muscle strengthening exercise on balance and fall efficacy in middle older adults women. This study was conducted with one group pre-test and post-test design. A total of 34 older adults women participated in 7 weeks of intervention. Data were analyzed as SPSS ver. 21.0 using descriptive statistics and paired t-test. Right leg balance(t=6.09, p<.001), left leg balance(t=6.76, p<.001), and fall efficacy(t=6.81, p<.001) were significantly increased. Dynamic balance(t= -4.68, p=.001) was significantly decreased. This study found that lower extremity muscle strengthening exercise program could be a useful health promotion method.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.38 no.10
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• pp.1147-1155
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• 2014

Biomechanical models are often used to predict muscle and joint forces in the human body. For estimation of muscle forces, the body and muscle properties have to be known. However, these properties are difficult to measure and differ from person to person. Therefore, it is necessary to predict the change in muscle forces depending on the body and muscle properties. The objective of the present study is to develop a numerical procedure for estimating the muscle forces in the human lower extremity under uncertainty of body and muscle properties during rising motion from a seated position. The human lower extremity is idealized as a multibody system in which eight Hill-type muscle force models are employed. Each model has four degrees of freedom and is constrained in the sagittal plane. The eight muscle forces are determined by minimizing the metabolic energy consumption during the rising motion. Uncertainty analysis is performed using a first-order reliability method. The one-standard-deviation range of agonistic muscle forces is calculated to be about 150-300 N.

• 건강소식
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• v.34 no.8
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• pp.12-13
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• 2010

노년에게는 근력운동이 아닌 걷기, 달리기, 수영 등 유산소운동이 적합한 운동으로 알고 있다. 근력운동을 하다가 자칫 잘못하면 더 큰 부상을 당할 수 있고, 운동 효율이 낮기 때문이다. 하지만 최근에는 근력운동이 노년에게도 필요하다는 주장이 점차 힘을 얻고 있는 추세이다. 구릿빛 피부에 울퉁불퉁한 식스팩까지는 아니지만 분명 노년을 건강하게 보내기 위해서는 근육이 필요하다.

• 건강소식
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• v.35 no.6
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• pp.24-25
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• 2011

30세 이후 근력은 지속적으로 감소하며, 운동을 꾸준히 하지 않는 이상 60세 이후 30% 정도 소실되는 것으로 알려졌다. 근육량이 적어지면 기초대사량이 감소하여 쉽게 살이 찌고, 고혈압 등 만성질환 등에 노출되기 쉽다. 또한, 하체근력이 약화되면 걷기 등 일상생활에서 문제가 따르고, 낙상 등의 위험도 배가 된다. 따라서 건강한 노후생활을 즐기기 위해서는 근력을 유지하는 것이 필수라고 해도 무방하다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.17-18
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• 2014

현대사회와 미래사회는 가속화되어지는 IT기술에 의해서 융합되어진 작업의 효율 및 성능의 발전이 이슈화되고 있다. 따라서 1990년대부터는 군사 및 재활분야와 함께 제조업 및 유통업 등 전반적인 산업 모두에서 근력보조기구에 대한 연구가 활발히 진행되고 있다. 과거에는 일반인이 무거운 짐을 운반하는 것을 완전한 로봇이 대체하거나 몸이 불편한 사회적 약자가 휠체어 및 지팡이 또는 전동 휠체어와 같은 보조 개념이 아닌 완전한 대체의 개념을 가지고 있었다. 그러나 웨어러블이 대두됨에 따라 기계와 인체가 합쳐지는 상호작용 근력보조기구가 탄생했다. 근력보조기구는 힘/토크 센서를 통한 인간과 로봇간의 상호작용에 의해 인간의 다양한 상지 및 하지 동작을 구현할 수 있는 근력 강화용 웨어러블 로봇 등이 있다.

• Journal of Digital Convergence
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• v.13 no.10
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• pp.533-539
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• 2015

The purpose of this study was to investigate the effects of 12weeks complexed lower body muscle-strengthening exercise program on fall risk in elderly women. Twenty subjects volunteered to participate who use a welfare center in W city For the study we divided into two groups: exercise group (EC, n=10, mean age:$69.6{\pm}2.2$), comparative group(CG, n=10, mean age:$71.3{\pm}4.6$). In order to investigate the effect of lower body muscle-strengthening program on the degree of risk of fall. It reached a conclusion as follows after having applied BBS (Berg Balance Scale) and OLST (One-Leg Stance Test) to examine the degree of risk of fall. As a result of changes in BBS and OLST, there were significant differences between EG and CG for each test(p<.00). Therefore, it confirmed that the application of complexed lower body muscle-strengthening program to the elderly who have a high risk of fall influences the risk of fall positively.

• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.195-202
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• 2020

This study is to investigate the effect of lower extremity strength exercise using biofeedback system on community-based elderly. Ten community-based elderly were exercised using the biofeedback system (with functional electrical stimulation) three times a week for six weeks. Data analysis was performed using Wilcoxon signed rank test. Physical function improved significantly, but there was no significant difference in muscle strength and muscle mass. Although elderly people were able to confirm that community-based ICT home biofeedback training could be possible and could lead to improvements in the lower extremity function, further research is needed to demonstrate a clearer effect by expanding the target population, distinguishing the sexes, and providing a personalized training method.