• PNF and Movement
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• v.10 no.1
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• pp.61-70
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• 2012

Purpose : The purpose of this study was to investigate thigh muscle-bone CSA and leg strength during low-intensity exercise program with leg blood flow restriction by external compression to reduce muscle outflow. Methods : Eighteen health students gave informed written consent to participate in this investigation. An occlusion cuff was attached to the proximal end of the leg so that blood flow was reduced during the training. The training was conducted one times a day, three times a week, for 8 weeks using one sets of 30 minutes. The training program performed to squat with standing, lunge with standing and heel raise with one leg standing. Measurements of thigh muscle-bone CSA(cross-sectional area) and leg strength were evaluated pre and post-training. Statistical evaluation of these data was accomplished utilizing a paired t-test by SPSS 12.0 program for windows. Significance level was set at p <.05. Results : All data are reported as means and standard deviations(SD) for all variables. The result of the study is followed; After the training, muscle-bone CSA, gluteus maximus m, quadriceps m, hamstring m of both legs were significantly improved but not calf muscle(p<.05). There was no significant difference of change quantity between muscle-bone CSA and leg strength in Lt. and Rt. side. But the variation in leg muscle strength of Rt. leg(dominant) was much more increased than Lt. leg(non-dominant) after 8 weeks training. Conclusion : Low-intensity training with leg blood flow restriction offers a potentially useful method for improving leg muscle strength.

• Journal of the Korean Society of Food Science and Nutrition
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• v.23 no.5
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• pp.827-831
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• 1994

Investigation on the extractability, Mg2+-, Ca2+ , EDTA-ATPase activity and solubility of actomyosin prepared from leg and breast muscle of silky fowol were as follows. The extractability of actomyosin in leg and breast muscle was 779mg/100g and 1, 318mg/100g respectively, breast muscle was higher than leg muscle . Mg2+-ATPase activity of actomyosin was high inionic strength 0.02-0.10 and Mg2+ATPase activity of low ionic strength was higher than high ionic strength not related to the part. Ca2+ ATPase activity was high in ionic strength 0.05-0.13, the activity of leg muscle was higher that breast muscle. And EDTA-ATPase activity showed low in low ionic strength and showed high in high ionic strength, and increased greatly depend ionic strength up to 0.4. The solubility of actomyosin was not different in leg and breast muscle , the solution started in KCI concentration of 0.3M and ended in DCI concentration of 0.4M.

• Journal of Korean Academy of Nursing
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• v.23 no.1
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• pp.56-67
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• 1993

The purpose of this study was to compare the circumference and skinfold thickness of upper and lower limb and the leg strength of the casted limb with those of the normal limb after removal of a leg cast. The subjects for the study were orthopedic patients who had had long and short leg casts or splints due to tibial, fibulal, metatarsal, calcaneus fracture or ankle sprains. The subjects were divided into two groups, those who had the cast on for less than 40 days and those for over 41 days. Circumference and skinfold thickness of the upper and lower limb on the side on which the cast was ap-plied were compared with those of the contralateral side after removal of the cast. Circumference and skinfold thickness of the upper and lower limb, and leg strength for those in a cast for under 40 days were compared with those of over 41 days for both the side to which cast was applied and the contralateral side. Measurements were made after removal of the cast. Skinfold thickness was measured by fat caliper, circumference was measured by tape and lower extremity strength was determined with flat foot pressing on an electronic digital health meter in the sitting position. The results can be summarized as follows : 1. The circumference of the upper and lower leg on the side on which the cast was applied, when measured after the cast was removed, were significantly less than those of the normal side, 93.88%, 93.11% each. 2. Skinfold thickness of the quadriceps and gastrocnemius on the side on which the cast was applied were significantly less than those of the normal side when measured after removal of the cast, 85.98%, 82.85% respectively. 3. Leg strength on the side where the cast was applied was significantly 1ss than that on the normal side, 60.20%. 4. There was no difference in the circumference of upper and lower limbs, skinfold thickness or leg strength on the side where the cast was applied between the group which had the cast applied for under 40 days and the group that had it applied for over 41 days. 5. The circumference of the upper arm and lower leg on the normal side for the group that had the cast applied for over 41 days was significantly greater than the group that had the cast application for under 40 days. T ere was no difference between the two groups in the circumference of the forearm and upper leg, skinfold thickness and leg strength in the normal side. From these results, it may be concluded that muscle atrophy was apparent in the casted limb compared to the normal limb, and the circumference of the upper arm and lower leg, and leg strength on the normal side increased after removal of the cast in the group which had the cast on for more than 41 days.

• Journal of the Korean Society of Physical Medicine
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• v.5 no.4
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• pp.569-576
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• 2010

Purpose : This study was aimed at determining the effects of community-based exercise program to improve leg muscle strength and balance for elderly women. Methods : This study was nonequivalent control group pre-post test design. Subjects were assigned to two different groups(exercise group=11, control group=7). Exercise group performed community-based exercise program for 8 weeks. Outcome measures included leg muscle strength, balance, walking velocity, activities of daily living(ADL), exercise self-efficacy and health-related quality of life(QoL). The collected data analyzed by independent t-test and paired t-test. Results : Leg muscle strength, walking velocity and mental component summary(QoL) were significantly improved in the exercise group. But balance and exercise self-efficacy were significantly worsened in the control group. There were no significant difference between groups after 8 weeks of community-based exercise. Conclusion : These results suggested that the community-based exercise program is effective for elderly women in improving leg muscle strength, walking velocity and mental component summary(QoL).

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.20 no.2
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• pp.9-14
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• 2014

Background: This study aims to examine correlations between quadriceps angle, lower extremity muscle strength and leg length discrepancy. Methods: This study selected 96 healthy women university students as the subjects of research. Quadriceps angle, lower extremity muscle strength and leg length discrepancy were measured. The statistical analysis of the data SPSS/window (version 12.0) were analyzed using the pearson correlation analysis. Results: There were negative correlations between the muscle strength of the right hamstring muscles and the right quadriceps angle in supine and standing positions. Functional leg length discrepancy of left and right quadriceps angle in supine and standing position showed positive correlations. Conclusions: The quadriceps angle affect the knee. An abnormal angle caused weakening of balance. Muscle strength, leg length discrepancy, and affected lower extremity alignment and knee function. These conclusions may prevent exercise limitation or disorders in the subjects and treating the patients with knee injury or patellofemoral pain syndrome with basic therapy intervention.

• Journal of Korean Academy of Nursing
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• v.24 no.1
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• pp.115-128
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• 1994

The purpose of this study was to observe the change of circumference, volume and strength of normal and operated lower extremities on 3rd, 7th, 10th, and 14th days of postoperation following THRA compared with their condition on preoperation day. Subjects consisted of 13 male and 7 female Patients operated with THRA between the age of 20 and 69 years with a mean age of 38.55(SD=15.1). Circumference of upper and lower leg was measured by tape, leg volume was determined according to formula (Moor & Thornton, 1987) with measurement of 8 circumferences of leg. Leg strength was measured by pressing the center of digital health meter in supine position. The results can be summarized as follows : 1. Circumference of operated thigh decreased significantly at 14 following THRA compared with preoperative value, while that of normal thigh decreased significantly at day 3, 7, 10 and 14 after THRA compared with preoperative value. 2. Circumference of midcalf in both operated and normal limb decreased significantly at day 3, 7, 10 and 14 following THRA compared with preoperative value. 3. Leg volume of operated lower limb decreased significantly at 10, 14 following THRA compared with preoperative value, while that of normal limb decreased significantly at day 7 & 10 after THRA compared with preoperative value.4. Leg strength of operated limb decreased significantly at day 3, 7, 10, 14 following THRA compared with preoperative value. No significant difference of normal leg strength was shown following THRA. 5. Circumference of midcalf differed significantly at day 14 after THRA between normal and operated extremity. From these results, it can be suggested that a decreased activity after THRA caused muscle atrophies in normal and operated extremity.

• Journal of Korean Academy of Nursing
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• v.30 no.3
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• pp.647-658
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• 2000

The purpose of this study was to determine the effect of Korean traditional dance movement training on balance, gait and leg strength in elderly women who are forced to remain at home. Fifteen elderly women of an experimental group between the ages 65 and 75 years who have normal vision and passed the hearing and Romberg test, participated in the 12 weeks' dance movement training. Fourteen subjects of a control group were selected. Korean traditional dance movement training was developed on the basis of Korean traditional dance and music by the authors. It took approximately 50 minutes to perform the dance movement program. The subjects of the experimental group practiced dance training for 3 times a week during 12 weeks. During the 50 minutes workout, the subjects practiced 15 minutes of a warm-up dance, 25 minutes of a conditioning dance, and 10 minutes of a cool-down dance. The intensity for the conditioning phase was between 60% and 65% of age-adjusted maximum heart rates. The balance, gait and leg strength were measured prior to and after the experimental treatment. Total balance scores of the experimental group were significantly higher than those of the control group. Scores of sternal nudge, one leg standing balance and reaching up among 13 items have significantly increased after the dance movement training. Total scores of gait of the experimental group were significantly higher than those of the control group following the korean traditional dance movement training. Scores of experimental group in step height, path deviation and turning while walking among 9 items have increased significantly following 12 weeks of dance movement training. The leg strength of experimental group was significantly higher than those of the control group following the Korean traditional dance movement training. The balance, gait and leg strength have significantly correlated in the experimental group following the Korean traditional dance movement training. The results suggest that Korean traditional dance movement training can improve balance, gait and leg strength in home bound elderly women.

• Journal of Preventive Medicine and Public Health
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• v.45 no.6
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• pp.381-386
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• 2012

Objectives: To investigate the link between cigarette smoking and muscle strength in Japanese men. Methods: We used data on 4249 Japanese men, aged $43.3{\pm}13.9$ years, in this cross-sectional investigation study. Grip strength and leg strength were measured as indicators of overall muscle strength. Meanwhile, subjects' cigarette smoking habits were recorded by trained medical staff. The effect of cigarette smoking on muscle strength was evaluated. Results: A total of 1618 men (38.1%) were smokers and 1481 men (34.9%) exercised regularly. Significant differences in muscle strength were noted between men with and without a Brinkman index of 400 or greater, after adjusting for age. After adjusting for age, height, body weight and exercise habits, associations between the Brinkman index and leg strength and the ratio of leg strength to body weight were attenuated. Conclusions: Cigarette smoking might be negatively associated with muscle strength, especially grip strength in Japanese men.

• Journal of the East Asian Society of Dietary Life
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• v.16 no.4
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• pp.453-457
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• 2006

This study investigated the extractability, solubility, Mg$^{2+}$-, Ca$^{2+}$- and EDTA-ATPase activity of actomyosin prepared from leg and breast muscle of dog meat. The actomyosin extractability of breast muscle(2,100.6 mg/l00 g) was higher than that of leg muscle(500.8 mg/l00 g). The Mg$^{2+}$-ATPase activity of actomyosin had a high ionic strength of 0.02$\sim$0.05 M KCI and did not differ between leg and breast muscle. The Ca$^{2+}$-ATPase activity of actomyosin had a high ionic strength of 0.02$\sim$0.10 M KCI and leg muscle had a higher level of Ca$^{2+}$-ATPase activity than breast muscle did. The EDTA-ATPase activity was lower in low ionic strength and showed higher in high ionic strength, and increased sharply with increasing ionic strength up to 0.3 M KCI. The solubility of actomyosin did not differ between leg and breast muscle, and the solubility started and ended at KCI concentrations of 0.35 M and 0.4 M, respectively.

• Journal of the Korean Society of Physical Medicine
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• v.4 no.3
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• pp.175-182
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• 2009

Purpose：The purpose of this study is to investigate the effects of Taekwondo training causing leg-muscular strength for elementary school children. Methods：The subjects were Taekwondo group (n=20) and non-Taekwondo group (n=20) from 5-6 graders of elementary school. The Tkd group exercised Taekwondo and the non-Taekwondo group exercised free gymnastics. The subjects were measured 3 times(pre, mid and after)during the 8weeks program. The leg muscular strength peak torque and average power were measured. And the extension-flection of angular speed 60 deg/sec and 180 deg/sec was measured. Results：The results of this study can be summarized as follows: 1. Compared with the Tkd group, the non-Tkd group showed no significant difference in tests statistically in case of right-left of pre-4weeks. The leg muscle's peak torque did not show significant difference in the extension angular 60 deg/sec(p>.05). 2. The score of flection angular speed 60deg/sec was not different in tests leg strength of right-left to pre-4weeks(p<.05), but the muscle was increased according to the amount of time spent in case of the 4-8weeks. 3. Compared with the Tkd group, the non-Tkd group showed no significant difference in tests statistically in case of right-left of pre-4weeks. The leg muscle's peak torque did not show significant difference in the extension angular 180deg/sec(p>.05). The right leg muscular strength was increased in case of the 4-8weeks. The left leg showed no difference. 4. Leg muscular strength was increased in the case of the pre-4weeks in the right of flection angular speed 180deg/sec. The left did not show difference. The right leg muscle in case of the 4-8weeks showed no difference. The left showed significant difference. Conclusion：Taekwondo training is effective for leg-muscular strengthing for elementary school children.