| Project/Area Number |
13680033
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
体育学
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| Research Institution | Kyushu Institute of Technology |
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Principal Investigator |
HIRAKOBA Kohji Kyushu Institute of Technology, Faculty of Computer Science and Systems Engneering, Professor, 情報工学部, 教授 (70173226)
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| Co-Investigator(Kenkyū-buntansha) |
INAKI Mitsuharu Sinan Jogakuin University, Faculty of Health and Welfare, Professor, 保健福祉学部, 教授 (20261787)
TORII Masafumi Kyushu Institute of Technology, Faculty of Engneering, Professor, 工学部, 教授 (00207664)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2002: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Blood Lactate / Blood Bicarbonate / Body Water / Buffering Action / Exercising Muscle / Non-Exercising Tissue / Acid-Basebalance / 緩衡作用 / 作業筋量 |
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| Research Abstract |
Excess Co_2 output from exercising thigh muscle during incremental exercise test (2001) and two workerates of constant exercise test (2002) were estimated using a cycle ergometer. Respiratory variable (Vo_2, Vco_2, VE) were measured throughout the exercise tests. In addition, blood samples from finger tip were obtained for analyses of blood lactate concentration and blood gases (PH, Pco_2, Po_2, Bicarbonate). The exercise intensities (below VT and above VT) were calculated from a work rate based on ventilatory threshold (VT) obtained in incremental exercise test. Ten normal adults were employed as the the subjects in this study. Total excess Co_2 output was significantly related to blood lactate accumulation (r=0.833, P<0.001) and bicarbonate decrease (r=0.913, P<0.001) in the two exercise tests. The rate of excess Co_2 output derived from exercising muscle to total excess Co_2 output showed lower values in constant exercises (49.5% in below VT and 49.4% in above VT) compared to incremental exercise. The difference of excess Co_2 output from exercising muscle between incremental and constant exercises seems to be resulted from lactate roduction in exercising muscle and lactate distribution volume within the body water. It is, therefore, suggested in this study that metabolic rate and muscle mobilization in exercising muscle would be determitant factors in predicting muscle lactate concentration from excess Co_2 Output in exercising muscle.
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