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초등학교 야구선수들의 등속성 근력 및 심폐지구력에 관한 연구
박일봉(Park Il-Bong),강성훈(Kang Sung-Hwun),차유림(Cha Yu-Rim),오경식(Oh Kyung-Sik),여남회(Yeo Nam-Hwoeh) 동아대학교 스포츠과학연구소 2005 스포츠科學硏究論文集 Vol.23 No.-
The purpose of this study was to investigate the result of on body composition, isokinetic muscle strength and cardiopulmonary in elementary school baseball player. The subjects consisted of 12aged male, who were divided into one group of 8 trained more than 2 years baseball experience and another group of 8 normal subjects. Cardiopulmonary metabolic variables were treasured during graded maximal exercise utilizing a treadmill. Also body composition and cybex isokinetic muscle strength were measured. The following conclusion was made in result of the test for the subjects. The height, weight and BMI, the player groups were shown to be higher significantly(p v.05) than normal groups. In isokiretic muscle strength, the player groups showed to be higher the significant(p <.05) than normal groups in cybex isokinetic muscle strength factor. In VO₂max, the player groups showed to be higher the significant(p <.05) than normal groups. From the result of this study, it can be concluded that elementary baseball players shown to be higher than normal groups for body composition, isokinetic muscle and cardiopulmonary.
강성훈(Kang Sung-Hwun),이재규(Lee Jae-Gue),양성우(Yang Sung-woo),박일봉(Park Il-Bong),차유림(Cha Yu-Rim),오경식(Oh Kyung-Sik),여남회(Yeo Nam-Hwoeh) 동아대학교 스포츠과학연구소 2005 스포츠科學硏究論文集 Vol.23 No.-
Erythropoietin is produced mainly in the kidney and regulates erythrocyte production. It binds to a cell surface receptor and leads to intracellular activation of several kinase pathways. EPO is a hypoxia-induced hormone that is essential for normal erythropoiesis. The production of recombinant human erythropoietin has revolutionized the treatment of anemia associated with chronic renal failure and chemotherapy. EPO has similar structure and signaling mechanisms to the family of type I cytokines and is markedly induced by hypoxia. EPO is synthesize by peritubular cells in the cortex-medullary border of the kidney and in the liver during fetal and neonatal development. A variety of other tissues have been reported to express erythropoietin including bore marrow macrophages, trophoblasts, breast glands, and astrocytes.<BR> Therefore, This study was invested relative in exercise and EPO, we had a conclusion as follows; 1) EPO is useful on polycythemia in test. 2) In patients with chronic renal insufficiency, r-HuEPO has also been shown to improve exercise capacity. 3) EPO has similar structure type I cytokines and induced by hypoxia.
운동과 2,3-DPG(diphosphoglycerate)와의 관계
강성훈(Kang Sung-Hwun),양성우(Yang Sung-woo),이재규(Lee Jae-Gue),박일봉(Park Il-Bong),차유림(Cha Yu-Rim),오경식(Oh Kyung-Sik),여남회(Yeo Nam-Hwoeh) 동아대학교 스포츠과학연구소 2005 스포츠科學硏究論文集 Vol.23 No.-
2,3-DPG is synthesized from glycolytic intermediates by a pathway known as Rapoport-Luebering shunt. The production of 2,3-DPG depends on the relative amounts of its precursor, 1,3-DPG going into Rapoport-Leubering pathway and into the ATP-forming glycolytic pathway. Its concentration also depends on the rate of hydrolysis of 2,3-DPG The most important function of 2,3-DPG is its effect on the oxygen affinity of Hb. Normal Hb in deoxygenated state can bind 2,3-DPG in a molar ration of 1:1 which results in reduced oxygen affinity of Hb and enhanced oxygen delivery to tissues. In oxygenated state the ability of Hb to bind 2,3-DPG is decreased and most DPG is in free state. As the result the affinity of Hb to oxygen is increased and it binds more of oxygen. Changes in 2,3-DPG levels have important role in adaptation to hypoxia. In anemia and certain hypoximic conditions, 2,3-DPG level in erythrocytes increase and oxygen affinity of Hb is reduced resulting in improved delivery of oxygen to tissues. This study was invested relative in exercise and 2,3-DPG we had a conclusion as follows; 2,3-DPG was increased in anemia, congestive heart failure, heart disease, hyperthyroidism but it was decreased in diabetic. Hypoxia was decreased and extremely exercise was increased.