• 대한정형외과스포츠의학회지
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• 제9권2호
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• pp.104-108
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• 2010

목적: 회전근 개 질환 치료 후 복귀 판정에 있어 기능적 평가로서 Korean Shoulder Scoring System (KSS)과 등속성 근력 평가 간의 상호 관계를 알아보고자 하였다. 대상 및 방법: 본 연구는 충돌 증후군 59명과 회전근 개 파열 환자 36명을 대상으로 하였다. KSS와 등속성 근력을 측정하고 KSS의 총점 및 기능적 평가 항목을 등속성 근력 결핍과 비교하여 상관 관계를 알아보았다. 결과: 등속성 근력 결핍은 KSS의 총점이나 근 지구력 검사 항목 점수가 클수록 근력 감소가 적게 나타나면서 상관계수 값(r)이 0.346이하로 약하게 보였다. KSS 도수 근력 검사 항목은 등속성 근력 감소와 상관 관계가 유의하지 않았다(p>0.05). 결론: 등속성 근력 결핍은 KSS 총점과 KSS 지구력 항목과는 약한 관련성을 보였다. 치료 후 정상 활동 복귀를 위해서 등속성 근력 검사를 통해서 판단함이 유용하다.

• 대한물리의학회지
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• 제10권2호
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• pp.63-71
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• 2015

PURPOSE: The purpose of this study to investigate the effects of exercise on lumbar stabilization in muscle activity and isokinetic muscle strength of female with chronic low back pain. METHODS: The candidates was chose to twenty women in their 30s and 40s complaining back pain for over 12 weeks and consist of 10 people for lumbar stabilization and general physical therapy group(PL group), another 10 people for general physical therapy group(GP group). Lumbar stabilization exercise was conducted for 8 weeks and was comprised of 60 minutes for two times a week. In order to examine the effects of lumbar stabilization, results in the present study were analyzed maximal voluntary isometric contraction (MVIC) using electromyogram to measure muscle activity and isokinetic performance including peak torque and average power at the pre to post. RESULTS: The following are results in this study. The MVIC and isokinetic muscle strength were gradually increased in all group. As the result of the test of the MVIC and isokinetic muscle strength, the difference of lumbar stabilization and general physical therapy group is statistically more significant than that of general physical therapy group. CONCLUSION: In the present study, results indicate that lumbar stabilization helps to improve the muscle activity and isokinetic muscle strength.

• Clinics in Shoulder and Elbow
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• 제17권4호
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• pp.166-174
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• 2014

Background: Our study was to determine the effect on shoulder isokinetic muscle strength and muscle endurance in isolated full-thickness supraspinatus tendon tear and combined other rotator cuff tear. Methods: Total of 81 male patients (mean age $57.8{\pm}7.4$ years) who were diagnosed as a full-thickness supraspinatus tendon tear were included. They were classified into isolated or combined tear. The isokinetic muscle strength and muscle endurance were measured using the Biodex multi-joint system $PRO^{(R)}$ (Biodex Medical Systems, Shirley, NY, USA) in following movements: shoulder abduction, adduction, flexion, extension, external rotation, and internal rotation. Then, the difference in muscle function according to the type of tears were assessed. Fifty-seven patients had isolated supraspinatus tendon (mean age $56.9{\pm}7.3$ years). They were classified into either anteroposterior tear or modified mediolateral tear. The size were measured using T2-weighted magnetic resonance imaging scans in sagittal plane. Results: Between subjects categorized into the type of tear, we found significant inter-categorical differences in isokinetic muscle strength during abduction, adduction, flexion, extension, and internal rotation, and in muscle endurance during flexion, extension, and internal rotation. Anteroposterior diameter tear, we did not show significant differences in either isokinetic muscle strength or muscle endurance during any movements. However, with modified mediolateral diameter, we found significant differences with isokinetic muscle strength during adduction, and in muscle endurance the external rotation and internal rotation. Conclusions: We found that a supraspinatus tendon tear associated with more numbers of rotator cuff tears has lower isokinetic muscle strength and muscle endurance than a tear found alone.

• International journal of advanced smart convergence
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• 제11권3호
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• pp.197-205
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• 2022

In order to investigate the effect of an 8-week elastic band exercise program according to age on the isokinetic strength and dynamic equilibrium of the knee, 10 women under 49 years old and 10 women over 50 years old were selected. Dynamic equilibrium was measured through Y-Balance test one week before the exercise program, and power and endurance were confirmed by measuring isokinetic muscle strength of the knee. After measurement, small tool exercise was performed for 8 weeks. After 8 weeks of exercise, isokinetic muscle strength and dynamic equilibrium were measured. As a result, isokinetic muscle strength, which checks muscle strength and muscular endurance, increased after measurement than before measurement regardless of age, and dynamic equilibrium increased after measurement rather than before measurement, and the group under 49 years of age was higher than the group over 50 years old. We think that small tool exercise improves isokinetic muscle strength and is effective in neuromuscular development, improving dynamic stability ability, which is an important factor in preventing falls.

• Physical Therapy Rehabilitation Science
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• 제12권2호
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• pp.201-205
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• 2023

Objective: Resistance exercise is a necessary element to improve quality of life, and measurement and evaluation of muscle strength provide important information for prescription and management of rehabilitation and exercise programs. This study analyzed the correlation between direct and indirect 1RM for isokinetic maximum torque of the knee joint in order to provide useful information in the field of exercise programs. In addition, the flexion-extension ratio and the difference in left-right deviation were verified. Design: A cross-sectional study Methods: The subjects of this study were 33 healthy adult men and women without medical problems who participated in the health exercise class program at S University in Seoul. The correlation between isokinetic maximum torque and direct and indirect 1RM was analyzed, and a dependent t-test was performed to analyze the flexion-extension ratio and left-right deviation. Results: There was a high correlation between the isokinetic maximum torque and direct and indirect 1RM, and no statistically significant difference was shown between the test methods in the analysis of the flexion-extension ratio and left-right deviation. Conclusions: Isokinetic muscle function measuring equipment is expensive, so it is difficult to use it in local exercise rehabilitation and training sites. Through this study, it was found that direct and indirect 1RM isokinetic maximum torque showed a high correlation, and there was no difference in evaluating muscle function such as flexion-extension ratio and left-right deviation. Therefore, it is considered that the muscle function evaluation using 1RM in general field can be usefully utilized.

• The Journal of Korean Physical Therapy
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• 제32권3호
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• pp.163-167
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• 2020

Purpose: Unilateral strength training effects on contralateral sides have been demonstrated in previous studies for lower extremity exercise, upper extremity exercise, and unilateral surface electrical stimulation. This study was performed to investigate the effects of unilateral ankle training on muscle strength and the balance of contralateral lower extremity in healthy adults. Methods: Thirty healthy subjects were randomized equally to a training or a control group. Those in the training group received unilateral ankle isokinetic strengthening training of the dominant leg (right side) for 4 weeks. Contralateral single-limb balance, including Anterio-Posterior Stability Index (APSI), Medio-Lateral Stability Index (MLSI) and Overall Stability Index (OSI), was assessed before and after intervention. Results: Comparison of pre- and post-test data revealed significant improvements in ipsi- and contralateral ankle strengths, and significant improvement in contralateral single limb balance. Conclusion: These results have practical implications because they demonstrate that unilateral ankle isokinetic exercise improves ankle muscle strength and balance ability of contralateral lower extremity.

• 대한정형도수물리치료학회지
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• 제15권2호
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• pp.1-7
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• 2009

Purpose : to investigate change of isokinetic muscle strength and isokinetic muscle endurance of quadriceps femoris and hamstring after application of taping and static stretching. Methods : For this study, 14 male members of college soccer team participated in this research. Participants were divided into two groups: seven was assigned to a taping group(n=7) and the others were assigned to a static stretching exercise group(n=7). Main outcome was measured by using biodex. The isokinetic muscle strength test was processed at the speed of the $60^{\circ}$/sec five times, and isokinetic muscle endurance was processed at the speed of $180^{\circ}$/sec ten times. Results : From the outcomes of the measurement, the results show that there is a more significant difference in the taping group than in a static stretching exercise group. Conclusion : These results will be utilized for the preliminaries in the future.

• 한국운동역학회지
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• 제18권4호
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• pp.41-47
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• 2008

본 연구는 정상 성인들을 대상으로 등속성 기구를 이용하여 무릎관절 신근 정적 스트레칭 빈도에 따른 등속성 변인들을 비교 분석함으로써 적절한 스트레칭에 대한 기초 자료를 제공하는데 목적이 있다. 45명의 대상자를 무작위 추출하여 3 Group 으로 각각 15명씩 나뉘었고, 우세측 다리의 무릎관절 신근 스트레칭으로 이루어진 4가지 정적 스트레칭 운동을 순서대로 각각 2회, 4회, 6회 실시하였다. 스트레칭이 끝나면 등속성 근력 검사를 실시하였다. 통계학적 처리는 paired t-test, 일원변량분석(one-way ANOVA)과 사후검정(Duncan)을 실시하였다. 결과는 스트레칭이 급성 등속성 근력의 저하를 가져오는 것을 알 수 있다. 또한 스트레칭 빈도에 따른 근력 변화에 있어선 4회 스트레칭 집단에서 보다 효과적인 근력의 감소를 나타내었다. 따라서 강한 근력을 필요로 하는 경기에 있어서 근육의 능력을 상실하지 않는 적절한 스트레칭 방법에 대한 고려가 필요할 것으로 생각된다.

• 혜화의학회지
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• 제18권2호
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• pp.13-20
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• 2009

Objectives : In order to investigate change of isokinetic trunk muscle strength according to decrease of body composition analysis parameter after obesity treatment. Methods : 2 obese patients have been treated with oriental medical obese treatment for 1 month. One patient got the exercise treatment, another didn't. Before and after treatment, the segmental bioelectrical impedance analysis, isokinetic trunk muscle strength test were performed. Then we analyzed the relationship of data. Results : After obesity treatment, BMI(Body Mass Index), PBF(Percentage of Body Fat), WHR(Waist Hip Ratio) were decreased in all patient and LBM(Lean Body Mass) was increased. In non-exercise patient, Ext.PT(extension Peak Torque) was decreased and Flex.PT(flexion Peak Torque) was increased. In exercise patient showed the opposite results. E/F ratio became more imbalance. Conclusions: Ext.PT was decreased in non-exercise patient but increased in exercise patient. And the trunk muscle strength became imbalance in both patients, right after the treatment. So trunk muscle exercise should be carried out and it is necessary to do long term study.

• The Journal of Korean Physical Therapy
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• 제16권4호
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• pp.1-10
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• 2004

The purpose of this study was to investigate the effects of treadmill aerobic exercise training on isokinetic muscle strength in students with cerebral palsy. The subjects consisted of 9 female students with cerebral palsy between the ages of 10 to 22. The subjects performed treadmill aerobic exercise training with $0\%$ grade by free speed with three times a week for 20 minutes a session and 12 weeks. Concentric peak torque of knee flexors and knee extensors was measured before training and after training at $30^{\circ}/sec$ and $60^{\circ}/sec$ by isokinetic dynamometer. Paired t-test was used to assess changes in variables of isokinetic muscle strength. The results of analysis are as followings. 1) After training, concentric peak torque of the least affected knee flexors(p<.01) and the most affected knee flexors (p<.01) and concentric peak torque of the least affected knee extensors(p<.01) and the most affected knee extensors(p<.01) at $30^{\circ}/sec$ significantly increased. 2) After training, concentric peak torque of the least affected knee flexors(p<.05) and the most affected knee flexors(p<.01) and concentric peak torque of the least affected knee extensors(p<.05) and the most affected knee extensors(p<.01) at $60^{\circ}/sec$ significantly increased. These findings provide evidence that treadmill aerobic exercise training improves isokinetic muscle strength in students with cerebral palsy.