• 한국운동역학회지
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• 제29권2호
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• pp.89-96
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• 2019

Objective: The purpose of this study was to investigate biomechanical comparisons of kettlebell two-arm swings after different somatosensory interventions on joint ranges of motion (ROM) and muscle activations. Method: Fourteen kettelbell novices (age: $22.92{\pm}3.23yrs$, mass: $75.75{\pm}9.94kg$, height: $172.03{\pm}5.49cm$), consisting of male college students, participated in this study and performed two-arm kettlebell swings in different conditions. Three different somatosensory interventions were the applications of heavy mass kettlebell (20 kg), taping on gluteus muscles, and unstable mat condition. All subjects performed pre-intervention swings and post-intervention swings, respectively. Statistical analysis were performed on results of joint kinematics and electromyographies of major muscles. Results: Results showed significant increases in ROM of hip and decreases in ROM of shoulder after unstable mat trials. In addition, the application of unstable mat during kettlebell swings induced higher muscle activations in gluteus maximus muscle during only upward phase of two-arm kettlebell swings. Conclusion: For beginner, the application of unstable surface would increase in hip joint ranges of motion with enhancement of gluteus muscles.

• 한국패류학회지
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• 제22권1호
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• pp.27-38
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• 2006

2005년 1월부터 12월까지 서해안 김제군 심포 앞바다에서 채집된 대맛조개, Solen grandis를 대상으로 생식소 발달 단계에 따른 생식주기를 조직학적 관찰에 의해 조사하였고, 폐각근, 내장낭, 족부근육, 외투막의 생화학적 함량 변화를 생화학적 분석에 의해 조사하였다. 본 종의 생식주기는 초기 활성기(12-1월), 후기 활성기 (1-3월), 완숙기 (3-7월), 부분산란기(6-7월), 퇴화 및 비활성기(7-12월) 의 연속적인 5단계로 구분되었다. 총단백질 함량은 족부근육에서 가장 높았으며, 족부근육 내의 총단백질 함량은 1월 (초기활성기) 에 높았고, 4월(완숙기)에 최소값을 나타내었으며, 8월 (부분산란기) 에 가장 높았다. 내장낭 내의 총단백질 함량은 2월 (후기활성기) 에 증가되기 시작하여 3월 (완숙기) 에 최대를 이룬 후, 6월과 7월 (부분산란기) 에 점진적으로 감소되었다. 내장낭과 외투막 사이의 총단백질 함량에는 강한 음 (-) 의 상관관계를 타나내었다(r = -0.594, p = 0.042). 그러나 폐각근과 족부근육 사이에는 양 (+) 의 상관관계를 보였으나 통계적으로 유의하지 않았다 (r = 0.507, p = 0.093). 총지질 함량은 내장낭에서 가장 높았다: 폐각근, 족부근육, 외투막 내 총지질 함량보다 2-5배 더 많았다. 총지질 함량의 월별 변화는 내장낭 내에서 가장 크게 변하였는데, 1월과 2월 사이에 비교적 높았고, 3월 (완숙기)에 최대에 이른 다음, 4-7월 (완숙기 및 부분산란기) 에 급격하게 감소되었으며, 9-12월 (퇴화 및 비활성기) 에 점진적으로 다시 증가되었다. 족부근육과 폐각근 사이의 총지질 함량 변화는 강한 양 (+) 의 상관관계를 나타내었다 (r = 0.639, p = 0.025). 비록 내장방과 외투막 사이의 총지질 함량 변화가 음(-)의 상관관계 을 보였어도 (r = -0.392), 통계적으로 유의하지 않았다 (p = 0.208). 글리코겐 함량 변화는 비교적 좁은 범위 내에서 변하였으며, 다른 조직들 간에도 유사하였다. 다른 조직들 내의 글리코겐 함량 변화는 통계적으로 유의하지 않았다.

• 대한추나의학회지
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• 제4권1호
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• pp.55-65
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• 2003

The purpose of this article was to contribute to the knowledge of physiological and pathological changes of aging skeletal muscles, and of therapic method. By aging there were changes of distribution of muscle fibers, the loss of muscle mass, the loss of the number of muscle fibers, the loss of glycolysis capacity, the decrease of the oxidative enzymes and muscle vascularization in the skeletal muscles. And as a pathological change, the exhaustive maximal exercise increased oxidative stress that led to oxidative damage which were shown to be implicated in promoting aging. The property of intensity and duration exercise is important not only in keeping human health and physical fitness from oxidative stress, but also for the maintenance of well-being and quality of life.

• 한국응용곤충학회지
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• 제55권1호
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• pp.1-9
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• 2016

식용곤충은 대체 식량자원으로 관심이 증가되고 있다. 본 연구의 목적은 누에나방 번데기 분말 섭취 유무에 따른 저항성운동 훈련(등장성 수축)이 ICR 마우스의 근육량 증가에 미치는 영향을 분석하였다. 이를 위하여 ICR 마우스 28마리를 대조군(CON), 저항성운동 훈련군(EX), 누에나방 번데기 분말 섭취군(SP), 누에나방 번데기분말 섭취 저항성운동 훈련군(SPEX)으로 그룹 당 각각 7마리씩 분류하였다. 체중증가율은 EX와 SPEX가 CON과 SP에 비해 유의하게 억제되었다. 혈중 총 단백질 농도는 SPEX가 다른 그룹에 비하여 가장 높았다. 알부민 농도 변화는 운동훈련 병행 시에만 증가하였다. 혈액 GOT와 GPT 수준은 유의차가 없었다. Akt와 Gsk-$3{\beta}$의 단백질 발현의 유의차는 없었다. 그러나 번데기 분말 섭취 시 Akt 증가 및 Gsk-$3{\beta}$의 감소 경향이 나타났다. 비복근 근육 양은 저항성 운동 훈련을 하였을 때만 증가하였다. 그리고 또한, 번데기 분말 섭취 시 근육량은 유의차가 없었으나 증가하는 경향을 보였다. 이러한 결과는 저항성 운동훈련과 누에나방 번데기 분말 섭취는 간독성을 유발하지 않고 근육량을 증가시킬 수 있다는 점을 시사한다. 그러나 보다 상세한 결과를 제시하기 위해 부가적인 연구가 필요할 것이다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제36권5호
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• pp.423-426
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• 2010

Hemangioma is a benign vascular proliferation. Intramuscular hemangiomas are rare, accounting for less than 1% of all hemangiomas, and occur normally in the trunk and extremities. Approximately 10-20% of intramuscular hemangiomas are found in the head and neck region, most often in the masseter muscles. The typical clinical characteristic is a painful soft tissue mass without cutaneous changes. The suggested treatment is a surgical excision. We report a case of an intramuscular hemagnioma of the masseter muscle. The patient was a 56 year old male who visited our clinic complaining of left facial swelling after 2 years of follow up at a different clinic. After magnetic resonance imaging (MRI), the mass was excised under general anesthesia. The biopsy revealed the mass to be an intramuscular hemangioma. We report the clinical and pathological characteristics as well as the treatment of a case of an intramuscular hemangioma of the masseter muscle.

• 대한물리의학회지
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• 제8권4호
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• pp.627-635
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• 2013

PURPOSE: The purpose of this study is to identify how the body composition changes after jump-roping exercise. METHODS: The subjects are 40 college students, 20 females and 20 males. The subjects were selected among college students who had not taken any drug for more than 4 weeks before the experiment started. The experiment was performed for 4 weeks, from May 23rd to June 13rd, 2012. To collect the data, the vital signs such as pulse, blood pressure, weight), and the body composition were measured before and after the experiment. The data on the body composition were analyzed by the electrical resistance analyzer. RESULT: Muscle mass was increased and body fat was decreased for both females and males after the exercise. In particular the increase of the muscle mass and the decrease of the body fat for the females were statistically significant. The result that the body fat of the females was decreased significantly more than that of males is interpreted that the body fat of females are comparatively higher than that of males. Additionally the muscle mass of the left arm and leg of the subjects were significantly increased(p<.05). Correlation analysis between general characteristics such as body composition, abdominal obesity and specific muscle areas for both men and women showed generally positive between before and after the jump-roping exercise (p<.05, p<.01). However the correlation between sleeping time and each variable showed negative. CONCLUSION: A according to the result of this study, jump-roping exercise had a very positive effect on the body composition. The study suggests that college students keep jump roping for a long period to change their body composition favorably.

• 대한두개안면성형외과학회지
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• 제20권6호
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• pp.388-391
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• 2019

Schwannoma is a slow-growing, well-demarcated, benign soft tissue tumor of the peripheral nerve sheath. It commonly develops in the head and neck region, usually in the parapharyngeal space. In this case, a 42-year-old woman visited the outpatient department to manage a painless mass on her left cheek. She had no history of concern and no neurological symptoms were observed. In the enhanced computed tomography scan, a 2.8×2.8×1.8 cm, heterogeneously enhanced tumor was detected in the left masseter muscle. A tumor resection under general anesthesia was planned. For the resection, a facelift incision was chosen; branches of the facial nerve were identified and retrogradely dissected. A well-marginated, yellowish, solid mass was found in the left masseter muscle. The mass was excised and given a histopathological diagnosis of schwannoma. A definite diagnosis of schwannoma, originating in the masseter muscle, is difficult to arrive at with radiographic findings alone; it is often misdiagnosed as intramuscular hemangioma. Histopathological examinations, including fine-needle aspiration or histological biopsy after surgery, are necessary. Using a facelift incision with retrograde facial nerve dissection, tumor resection in an intramasseteric lesion can be performed efficiently, without nerve damage, or leaving conspicuous scars on the face.

• 한국응용과학기술학회지
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• 제37권1호
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• pp.114-123
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• 2020

이 연구의 목적은 파워 저항운동이 여성노인의 체력, 근육량 및 단기운동수행력에 미치는 영향을 보고자 하였다. 이 연구에 참여한 피검자는 70세 이상의 천안시 거주 여성노인 30명을 파워 저항운동군 15명과 일반 저항운동군 15명으로 분류하였다. 파워 저항운동군은 속도를 빠르게 하는 저항운동을 일반 저항운동군은 평소속도의 운동을 주 3회 60분간 실시하였다. 연구결과 근력은 두 저항운동군에서 유의한 개선을 보였고, 전신지구력에서는 파워 저항운동군에서 유의한 개선을 보였다. 단기운동수행력 중 2.44m왕복걷기는 파워 저항운동군에서, 400m걷기에서는 두 저항운동군에서 유의한 개선을 보이는 것으로 나타났다. 결론적으로 체력과 근량 및 단기운동수행력에서 두 운동방법의 효과는 충분하나 파워저항운동이 다소 우세한 것으로 나타났다.

• Genomics & Informatics
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• 제11권4호
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• pp.263-271
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• 2013

We investigated the contribution of genetic variations of KLF5 to basal metabolic rate (BMR) and resting metabolic rate (RMR) and the inhibition of obesity in Korean children. A variation of KLF5 (rs3782933) was genotyped in 62 Korean children. Using multiple linear regression analysis, we developed a model to predict BMR in children. We divided them into several groups; normal versus overweight by body mass index (BMI) and low BMR versus high BMR by BMR. There were no differences in the distributions of alleles and genotypes between each group. The genetic variation of KLF5 gene showed a significant correlation with several clinical factors, such as BMR, muscle, low-density lipoprotein cholesterol, and insulin. Children with the TT had significantly higher BMR than those with CC (p=0.030). The highest muscle was observed in the children with TT compared with CC (p=0.032). The insulin and C-peptide values were higher in children with TT than those with CC (p=0.029 vs. p=0.004, respectively). In linear regression analysis, BMI and muscle mass were correlated with BMR, whereas insulin and C-peptide were not associated with BMR. In the high-BMR group, we observed that higher muscle, fat mass, and C-peptide affect the increase of BMR in children with TT (p < 0.001, p < 0.001, and p=0.018, respectively), while Rohrer's index could explain the usual decrease in BMR (adjust $r^2$=1.000, p < 0.001, respectively). We identified a novel association between TT of KLF5 rs3782933 and BMR in Korean children. We could make better use of the variation within KLF5 in a future clinical intervention study of obesity.

• Kidney Research and Clinical Practice
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• 제37권4호
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• pp.404-413
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• 2018

Background: Dynapenic obesity and sarcopenic obesity increase cardiovascular disease (CVD) and mortality in nonuremic patients. The present study was designed to determine the prevalence of dynapenic obesity and sarcopenic obesity and their associations with CVD risk factors in peritoneal dialysis (PD) patients. Methods: All eligible PD patients in Tehran peritoneal dialysis centers were included in this cross-sectional study. Skeletal muscle mass and fat mass were assessed using bioelectrical impedance analysis. Muscle strength and physical performance were determined using hand grip strength and a 4-meter walk gait speed test, respectively. In addition, a 5-mL blood sample was obtained from each patient. Results: The prevalence of dynapenic obesity and sarcopenic obesity were 11.4% and 3.8% in PD patients, respectively. Serum high-sensitive C-reactive protein (hs-CRP), soluble intercellular adhesion molecule type 1, triglyceride, total cholesterol, and low-density lipoprotein cholesterol were significantly higher in PD patients with dynapenic obesity than in dynapenic nonobese and nondynapenic nonobese patients. Similarly, serum concentrations of CVD risk factors in PD patients with sarcopenic obesity were higher than in nonsarcopenic nonobese patients, but these differences were statistically significant only for serum hs-CRP and triglyceride. In addition, muscle strength and skeletal muscle mass percentage were negatively associated with markers of inflammation and dyslipidemia, whereas body fat percentage was positively associated with these CVD risk factors. Conclusion: This study indicates that although the prevalence of dynapenic obesity and sarcopenic obesity are relatively low in PD patients, these disorders may be associated with CVD risk factors.