• 생명과학회지
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• 제20권4호
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• pp.549-554
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• 2010

어깨 관절의 외선의 증대와 내선의 감소는 야구 투수들의 어깨에 주의 깊게 발생한다는 것을 알아야한다. 본 연구의 목적은 MRI 진단을 통해 상완골 후경각을 판단하고, 야구 투수들에게 정해진 각도에서의 길항근의 신장성 수축과 주동근의 단축성 수축을 통한 근력을 비교 분석하는데 있다. 대상자는 어깨관절의 통증을 경험하지 않은 9명의 투수들을 선정하였고, 투구측과 비투구측을 어깨관절을 대상으로 등속성 시스템을 이용하여, $90^{\circ}/s$와 $180^{\circ}/s$의 속도로 어깨관절의 내선 $90^{\circ}$와 외선 $20^{\circ}$의 범위에서 근력측정을 하였다. 모든 데이터는 대응 t검정을 사용해 분석 및 평가를 하였다(p<0.05). 그 결과 투구측의 총 가동역은 $180.1^{\circ}$로 나타났으며, 비투구측은 $183.7^{\circ}$로 나타났다. 상완골 후경각은 투구측이 $47.6{\pm}6.1^{\circ}$로 나타났으며, 비투구측은 $37.8{\pm}5.3^{\circ}$로 유의한 차이를 보였다(p<0.05). 투구측의 내선근 단축성 수축력(IR-Con)은 $31.5{\pm}5.1\;Nm$로 나타났으며, 비투구측의 $38.7{\pm}5.2\;Nm$와 비교해 유의한 차이를 보였다(p<0.05). 투구측의 외선근 신장성 수축력(ER-Ecc)도 $20.3{\pm}4.7\;Nm$로 나타났으며, 비투구측의 $25.1{\pm}3.7\;Nm$에 비교해 통계학적으로 유의한 차이를 보였다(p<0.05). 결론으로는 본 연구의 검토를 통해 투수들의 어깨관절에 있어서 외선의 증대 및 내선의 감소는 상완골 후경각의 골성의 변화가 중요한 요인으로 나타났으며, 근력의 변화에도 중대한 영향을 미치는 것으로 나타났다.

• The Journal of Korean Physical Therapy
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• 제15권2호
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• pp.168-181
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• 2003

The purpose of this study was to investigate the effects of circuit weight training(CWT) on isokinetic muscle strength and body composition in elderly. The subjects who engaged in this experiment exercised at 40$\%$ of 1-RM, 12 repetitions, followed by 15 sec as the subject moved to the each break training program which was consist of the circuit of 10 stations performed on 3 set a day, circuits 3 days a week during 10 weeks. The assessment of isokinetic factor was in concentric flexors and extensors of right and left knee joint. Tests were performed on the Cybex 770 Isokinetic Dynamometer and body composition were estimated the three parts of chest, abdomen and anterior thigh by using skinfold caliper, calculated the average and followed by Seri and Brozek way. Statistical analysis were performed using analysis of variance paired t-test, accepting level for all significant was above $\alpha$=.05 and $\alpha$=.01. Following is as a result of 10 weeks circuit weight training. 1. At the $60_{\circ}$ /sec, the right and left knee isokinetic concentric flexors and extensors peak torque increased significantly (p < .01). 2. At the $180_{\circ}$ /sec, the right and left knee isokinetic concentric flexors and extensors peak torque increased significantly (p < .01). 3. At the $60_{\circ}$ /sec, the right and left knee isokenetic concentric flexors and extensors average power increased significantly(p < 0.5, p < .01) and at the $180_{\circ}$ /sec, the right extensors didn't show any statistical significant. 4. At the $60_{\circ}$ /sec, the right and left knee Isokinetic concentric flexors and extensors total work increased significantly(p < .05, p < .01) but at the $180_{\circ}$ /su right concentric flexors didn't show any statistical significant. 5. The body composition changed significantly(p < .01). These results suggest that 10 weeks circuit weight training increases the peak torque, average power, total work significantly and decreases the $\%$body fat significantly.

• 대한물리의학회지
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• 제13권3호
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• pp.27-37
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• 2018

PURPOSE: The purpose of this study was to investigate and evaluate muscle activity and foot pressure during gait, and isokinetic strength and balance in persons with functional ankle instability (FAI). METHODS: Nine healthy subjects (CON, n=9) without FAI and 11 patients (FAI, n=11) with FAI participated in the study after having been screened with an ankle instability instrument and a balance error scoring system. In addition, FAI was classified as non-involved (FAI-N) or involved (FAI-I), and CON was classified as dominant or non-dominant. All subjects were evaluated for isokinetic strength (plantar flexion, dorsiflexion, inversion and eversion of $30^{\circ}/sec$ and $60^{\circ}/sec$), balance (static and dynamic), muscle activity (tibialis anterior, peroneus longus and gastrocnemius) and foot pressure (static and dynamic) during gait. RESULTS: Results showed that plantar flexion (p<.05), dorsiflexion (p<.05), inversion (p<.01) and eversion (p<.00) of $60^{\circ}/sec$ were significantly decreased in FAI-I compared to those in FAI-N and CON. C 90 of static balance with eyes open (p<.01) and closed (p<.00) were significantly increased in FAI compared to those in CON. Forward position of dynamic balance (p<.01) was significantly decreased in FAI compared to that in CON. Gastrocnemius and peroneus longus of dynamic muscle activity (p<.01), left and right weight distribution of static foot pressure (p<.00) and pressure distribution of dynamic foot pressure (p<.00) were significantly decreased in FAI-I compared to those in FAI-N. CONCLUSION: We demonstrated that ankle strength, balance, muscle activity and foot pressure were significantly correlated with FAI.

• The Journal of Korean Physical Therapy
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• 제15권4호
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• pp.398-411
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• 2003

The purpose of this study was to investigate the effects of circuit weight training(CWT) on isokinetic muscle strength and body composition in elderly. The subjects who engaged in this experiment exercised at $40\%$ of 1-RM, 12 repetitions, followed by 15 sec as the subject moved to the each break training program which was consist of the circuit of 10 stations performed on 3 set a day, circuits 3 days a week during 10 weeks. The assessment of isokinetic factor was in concentric flexors and extensors of right and left knee joint. Tests were performed on the Cybex 770 Isokinetic Dynamometer and body composition were estimated the three parts of chest, abdomen and anterior thigh by using skinfold caliper, calculated the average and followed by Seri and Brozek way. Statistical analysis were performed using analysis of variance paired t-test, accepting level for all significant was above ${\alpha}=.05$ and ${\alpha}=.01$. Following is as a result of 10 weeks circuit weight training. 1. At the $60_{\circ}$ /sec, the right and left knee isokinetic concentric flexors and extensors peak torque increased significantly(p<.01). 2. At the $180_{\circ}$ /sec, the right and left knee isokinetic concentric flexors and extensors peak torque increased significantly(p<.01). 3. At the $60_{\circ}$ /sec, the right and left knee isokenetic concentric flexors and extensors average power increased significantly(p<.05, p<.01) and at the $180_{\circ}$ /sec, the right extensors didn't show any statistical significant. 4. At the $60_{\circ}$ /sec, the right and left knee Isokinetic concentric flexors and extensors total work increased significantly(p<.05, p<.01) but at the $180_{\circ}$ /sec right concentric flexors didn't show any statistical significant. 5. The body composition changed significantly(p<.01). These results suggest that 10 weeks circuit weight training increases the peak torque, average power, total work significantly and decreases the $\%$body fat significantly.

• 대한물리치료과학회지
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• 제13권2호
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• pp.7-16
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• 2006

The purpose of this study was to investigerate the changes of isokinetic muscular function in elderly people who have been to take from osteoarthritis in both knee joints after 36 weeks' rehabilitative therapy programs. In this study the subjects were 20 women residing in S-Tower(n=10) and H-welfare Town(n=10) respectively. The rehabilitative group(equal to experimental group) had taken part in exercise program 5 days per week. And then was performed by warm up, workout(involving aerobic exercise and weight training), cool down, physical therapy(cryotherapy, TENS, ultrasound). Also its programs were classified in conditioning phase($0{\sim}12$ weeks), improvement phase($13{\sim}24$ weeks), and maintenance phase($25{\sim}36$ weeks) respectively. The results of inspections were as followed: In the isokinetic muscular function, there were significant differences in right leg's flexor and extensor in $60^{\circ}$/sec. And there were significant differences in right leg's flexor and left leg's extensor in $180^{\circ}$/sec. At last, there were significant differences in right leg's flexor and left leg's extensor in $240^{\circ}$/sec. In other words, the rehabilitative programs for 36 weeks could increase the muscular function in elderly with OA. In conclusion, the rehabilitative programs of this paper has shown the positive results, which involved in the muscular function variables in elderly people with OA in both knee.

• 한방재활의학과학회지
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• 제18권3호
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• pp.91-98
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• 2008

Objectives : The purpose of this study is to evaluate flexor-extensor muscle strength of trunk according to Sasang constitution. Methods : This study was carried out with the data from comprehensive medical testing. People were performed Trunk Extension Flexion(TEF) Program of CYBEX NORM System and QSCC(Questionnaire of Sasang Constitution Classification) II test. And then we made three groups according to Sasang constitution and analyzed isokinetic strength on the TEF. Results : 1. A significant difference(Taeumin>Soeumin>Soyangin) was found in flexor muscle peak torque(PT) of trunk according to Sasang constitution(P<0.05). 2. A significant difference was not found in flexor muscle peak torque%body weight (PT%BW) of trunk according to Sasang constitution. 3. A significant difference(Taeumin>Soeumin>Soyangin) was found in extensor muscle peak torque(PT) of trunk according to Sasang constitution(P<0.05). 4. A significant difference(Soeumin>Taeumin>Soyangin) was found in extensor muscle peak torque%body weight(PT%BW) of trunk according to Sasang constitution(P<0.05). Conclusions : There is a significant difference in isokinetic strength on the TEF according to Sasang constitution.

• The Journal of Korean Physical Therapy
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• 제23권1호
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• pp.13-19
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• 2011

Purpose:This study was designed to investigate difference in isokinetic muscle strength in the knee extensor muscle and characteristic differences in muscle strength between males and females through the ankle joint angles. Methods: Seventy-four subjects participated in this study. There were two groups: 36 males and 38 females. The mean age of the men was 24.58 years and women was 23.74 years. Subjects were seated on a CON-TREX LP (leg press) lean to back of chair, and there bodies were fixed by straps with the hip joint at an angle of $130^{\circ}$. After randomly fixing the ankle joint at $0^{\circ}$, $20^{\circ}$, and $40^{\circ}$ of plantar flexion (PF) in range of full extension of knee joint. We studied force max average, force max average/kg, power average, and total work through the angle of the ankle joint when the knee joint was extended from $90^{\circ}$ to $180^{\circ}$. Results: In the male group, all maximum measured value showed at the ankle joint $0^{\circ}$, all minimum measured value showed at $40^{\circ}$ PF (p<0.01). In the female group, all maximum measured value showed at the ankle joint $20^{\circ}$ PF, especially the power average increased significantly. All minimum measured value showed $40^{\circ}$ PF (p<0.01). Conclusion: There are differences between males and females in isokinetic muscle strength of the knee extensor through ankle joint angles in healthy adults. Males and Females have different characteristics of muscle strength through the ankle joint angles.

• 정형스포츠물리치료학회지
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• 제14권2호
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• pp.45-53
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• 2018

Purpose: The purpose of this study was to investigate the effects of muscle activity and muscle strength according to verbal command volume during isokinetic and isometric quadricep exercises. Methods: To measure muscle activity and muscle strength, surface electrodes were attached to the participants, as they sat on a Biodex chair. The isometric exercise was performed three times, with maximum exercise at $30^{\circ}$ bending angle, based on a maximum extension state of the knee at $0^{\circ}$. The average holding time was unified to three seconds. In addition, the isokinetic exercise was performed three times, at $60^{\circ}/sec$. The verbal command ranged between 0∾60 dB and 0∾75 dB. Muscle activity was measured using surface electromyography (4D-MT, Relive, Gimhae, Korea). The Biodex System 4 was used to measure the isometric and isokinetic strength of the nodal line, and 4D-MT was used to measure muscle activity. Results: There were significant improvements in the maximal and relative muscle strengths, when the 0∾ 60 dB and 0∾75 dB verbal commands were applied with isokinetic extension/flexion (p<.05). The isokinetic exercise (0∾75 dB) group showed a significant difference in the vastus medialis oblique muscle activity change (p<.05), while the isometric exercise (0∾75 dB) group showed a significant difference in the rectus femoris muscle activity change (p<.05). Conclusions: Our results reveal that verbal commands effectively improve muscle activity and muscle strength during isokinetic and isometric quadricep exercises.

• 한국엔터테인먼트산업학회논문지
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• 제13권8호
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• pp.595-602
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• 2019

본 연구의 목적은 비만여성에게 필라테스를 적용한 연구들을 대상으로 필라테스가 비만여성에게 나타나는 신체적, 정신적 효과에 대하여 조사하는 것이다. 논문의 선정은 데이터베이스 학술연구정보서비스(RISS), Pubmed를 통해 선정기준에 해당하는 총 11편의 논문을 선정하였다. 필라테스로 인한 비만 여성들의 변화로는 허리와 다리의 등속성 근력과 허리둘레의 변화, 비만관 관련된 신체구성성분 중, RBP-4, 인슐린, 글루코스, 코르티솔, 렙틴, 콜레스테롤, 체지방, CRP의 감소와 그렐린, 아디포넥틴 농도의 증가, 혈관 탄성의 유의한 변화를 볼 수 있으며, 자아 존중감 및 삶의 질 지표 변화로 비만으로 인한 부정적 정서에 긍정적 영향을 미친다고 나타내었다. 필라테스는 건강과 관련된 요소에서 효과적이라고 보여지며 비만 여성의 라이프케어에 추천되는 운동으로 생각된다.

• 대한물리치료과학회지
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• 제6권4호
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• pp.229-240
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• 1999

I examined the isokinetic knee extension mean torque in 30 patients with hemiplegia and 30 healthy subjects matched by age, sex, height, and weight at knee extension velocities of $30^{\circ},\;60^{\circ},\;90^{\circ}$, and $120^{\circ}$/sec. The purpose of this study is as follows: first, to compare isokinetic data between the involved and uninvolved side of patients and healthy subjects. secondly, to determine whether the relative decreases in knee extension mean torque at velocities greater than $30^{\circ}$/sec were different on the two sides. Mean torque of quadriceps on both sides of patients with hemiplegia was significantly less than the mean torque of muscle of healthy subjects at various speeds. Relative decreases in knee extension mean torque differed between speeds, but not between sides. Torque at speed greater than $30^{\circ}$/sec were correlated significantly with the torque at $30^{\circ}$0/sec. These finding indicated that isokinetic testing can provide objective information about quadriceps muscle performance in hemiplegia, and suggested that hemiplegia may have difficulty in moving forcefully at higher speeds than $30^{\circ}$/sec because they are weak. Therapeutic intervention, therefore, might be most beneficial when they are directed toward helping patients with hemiplegia activate their muscle weakness.