• The Journal of the Korea Contents Association
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• v.12 no.1
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• pp.329-337
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• 2012

The purpose of this study was to investigate the functional changes of the vastus medialis while the neuromuscular electrical stimulation(NMES) was performed in elderly women with knee osteoarthritis. The subjects of this study were 30 women who were diagnosed degenerative arthritis, 15 in the experimental group and 15 in the control group. The experimental group performed conventional physical therapy and neuromuscular electrical stimulation, and the control group received only conventional physical therapy, five times per week for four weeks. Outcome measures were assessed before and after 4weeks using the VAS(pain), quadriceps femoris strength, thigh circumference, and Q-angle. The data of the quadriceps femoris strength and thigh circumference were significantly increased in experimental group(p<0.05). The data the pain was significantly decreased in both the two groups(p<0.05). There were statistically significant differences in quadriceps femoris strength and thigh circumference between the two groups(p<0.05). As the result, the application of neuromuscular electrical stimulation of the vastus medialis could be more effective for decrease pain and improving muscle function in patients with knee osteoarthritis.

• Journal of the Korean Arthroscopy Society
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• v.14 no.2
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• pp.88-91
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• 2010

전방십자인대 재건술시 자가건 선택에 대해서는 많은 논쟁의 소지가 존재하며 많은 보고들이 나오고 있으나, 현 시점에서 이식건으로써 자가 골-슬개건-골이 표준(gold standard)라는 주장은 이제 변화하고 있으며, 골-건 고정방법의 개선에 따른 조기 슬관절 안정성의 호전으로 자가 슬괵건의 사용이 점점 증가되고 있는 추세이다. 자가 골-슬개건-골은 이식건으로써 강한 물성, 튼튼한 고정, 장기 추시에서 높은 성공률 등으로 젊고, 강한 활동을 요하는 운동선수에서 종종 선택되고 있으며 조기에 강한 활동으로의 운동 복귀를 할 수 있다. 그러나 슬관절 전방 통증, 무릎을 꿇을 때의 통증, 슬개골골절, 슬개-대퇴 관절의 염발음 및 대퇴사두근력의 감소 등 이식물 채취로 인한 공여부 이환이 문제가 되었다. 그래서 자가 골-슬개건-골의 이식건으로서의 문제점 및 문헌상 고찰을 하여 논하고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.10
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• pp.272-279
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• 2018

This study was conducted to compare the muscle strength, muscle power, and H/Q ratio according to energy system contribution in athletes participating in various sports. Subjects of the study were assigned into an Anaerobic Exercise Group (AEG, n=60; Short-Distance, Weight Lifting, Jumping, Throwing, Bowling, Golf) and an Endurance Exercise Group (EEG, n=60; Modern Pentathlon, Field Hockey, Handball, Cycle, Boxing, Rowing) groups. Isokinetic peak torque/body weight% and flexor/extensor ratio at 60, 180 deg/sec of knee extension and flexion were measured using an cybex 770. Data analysis was conducted using an independent t-test and one-way ANOVA. Based on the results of this study, there was higher extension, flexion strength and flexion power in the AEG than the EEG (p<0.05). We also confirmed higher muscle strength and muscle power in short distance and jumping athletes than other athletes participating in other events (p<0.05). However, there was no significant difference within the endurance exercise group. The HS ratio was within a stable range of 50% to 60% in all events. Collectively, the outcomes of this study indicate that routine physiological and performance testing can provide measurable benefits for elite athletes and their coaches.

• Journal of Life Science
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• v.14 no.3
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• pp.484-489
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• 2004

Artificial joint replacement is one of the major surgical advances of the 21th century. The primary purpose of a TKA (Total Knee Arthroplasty) is to restore normal knee Auction. Therefore, ideally, a TKA should: (a) maintain the natural leverage of the knee joint muscles to ensure generating adequate knee muscle moments to accomplish daily tasks such as rising from a chair or climbing stairs;(b) allow the same range of motion as an complete knee; and (c) provide adequate knee joint stability. Four individuals (2 peoples after surgery one year and 2 peoples after surgery three years) participated in this study. All they were prescreened for health and functional status by the same surgeon who performed the operations. Two days of accommodation practice occurred prior to the actual strength testing. The isometric strength (KIN-COM III) of the quadriceps and hamstring were measured at 60$^\circ$ and 30$^\circ$ of knee flexion, respectively. During isokinetic concentric testing, the range of motion was between 10$^\circ$ to 80$^\circ$ of knee flexion (stand-to-sit) and extension (sit-to-stand). for a given test, the trial exhibiting maximum torque was analyzed. A 16-channel MYOPACTM EMG system (Run Technologies, Inc.) was used to collect the differential input surface electromyographic (EMG) signals of the vastus medialis (VM), vastus lateralis(VL), rectus femoris (RF) during sit-to-stand and stand-to-sit tests. Disposable electrodes (Blue SensorTM, Medicotest, Inc.) were used to collect the EMG signals. The results were as follows; 1. Less maximum concentric (16% and 21% less for 1 yew man and 3 years mm, respectively) and isometric (12% and 29%, respectively) quadriceps torque for both participants. 2.14% less maximum hamstrings concentric torque for 1 year man but 16% greater torque for 3 years mm. However, 1 year man had similar hamstring isometric peak torque for both knees. 3. Less quadriceps co-contraction by 1 year man except for the VM at 10$^\circ$-20$^\circ$ and 30$^\circ$-50$^\circ$ range of knee flexion.

• Journal of Korean Orthopaedic Sports Medicine
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• v.7 no.2
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• pp.95-121
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• 2008

Purpose: The goal is to identify the effectiveness of the IKDC subjective score in the clinical outcome study after reconstruction of the anterior cruciate ligament. Materials and Methods: Twenty-four patients after ACL reconstructions using twelve hamstring autografts and twelve Achilles allografts were evaluated. Lysholm knee score, IKDC subjective score, Knee Outcome Survey score and Tegner activity score were evaluated for the subjective outcome value. Static instability tests, Biodex dynamometer and one-legged hop for distance tests were done for the objective outcome value. Three functional performance tests (FPTs) including Carioca test, Shuttle run test and Co-contraction test were performed for deciding the final results. Each scale was compared with FPTs results and Pearson's correlation test was used to test the correlation between the parameters. Results: IKDC subjective score, single hop test, and quadriceps power in low velocity of Biodex dynamometer tests had a positive correlation with the total FPTs results. Conclusion: IKDC subjective score can be an effective test to evaluate the functional status as well as the subjective outcome after ACL reconstruction.