1997 Fiscal Year Final Research Report Summary
Development of evaluation system for measuring muscle metabolism
| Project/Area Number |
07558139
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
体育学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
FUKUNAGA Tetsuo The University of Tokyo Graduate School of Arts and Sciences, Professof, 大学院・総合文化研究科, 教授 (40065222)
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| Co-Investigator(Kenkyū-buntansha) |
SHINOHARA Minoru The University of Tokyo Graduate School of Arts and Sciences, Research Assistant, 大学院・総合文化研究科, 助手 (70241213)
FUKASHIRO Senshi The University of Tokyo Graduate School of Arts and Sciences, Assosiate Professo, 大学院・総合文化研究科, 助教授 (50181235)
KAWAHARA Takashi The University of Tokyo Graduate School of Arts and Sciences, Assosiate Professo, 大学院・総合文化研究科, 助教授 (60169753)
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| Project Period (FY) |
1995 – 1997
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| Keywords | EMG / MMG / NIRS / oxygenation |
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| Research Abstract |
The purpose of the present study is to observe muscle metabolism by means of newly developped measuremten system (NDMS) which consisted of NIRS,MMG and EMG apparatus. Using the NDMS the muscle oxugenation was estimated during various muscle contractions. For example, when the knee extensor muscle such as rectus femoris, vastus lateralis, vastus medialis and vastus intermedius were contracted isometrically during such long time as over 50 minutes, i.e.muscle fatigued, the transfer of activity among each muscle was observed, especially, activity of rectus femoris muscle increased when other muscle inactivated andvise versa. The muscle oxygenation in these muscle group were accompanied by the changes in these activation level. On the other hand, when isometric contraction (knee extension) was performed intermittently 50 times with rested 3 seconds EMG and MMG activities obtained from knee extensor muscle decreaed by 70% and 50% respectively. The order of activation level of MMG was RF<VL<VM.This differences of MMG has been considered to be due to differences of muscle fiber type composition in each muscle group. From these results it is suggested that muscle fatigue affect on muscle activation pattern and metabolism, especially rectus femoris muscle indicats specific responces compared to other knee extensors.group were accompanied by the changes in these activation level. On the other hand, when isometric contraction (knee extension) was performed intermittently 50 times with rested 3 seconds EMG and MMG activities obtained from knee extensor muscle decreaed by 70% and 50% respectively. The order of activation level of MMG was RF<VL<VM.This differences of MMG has been considered to be due to differences of muscle fiber type composition in each muscle group. From these results it is suggested that muscle fatigue affect on muscle activation pattern and metabolism, especially rectus femoris muscle indicats specific responces compared to other knee extensors.
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