Relationships between Force-Time Parameters and Muscle Oxygenation Kinetics during Maximal Sustained Isometric Grip and Maximal Repeated Rhythmic Grip with Different Contraction Frequencies
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概要
- 論文の詳細を見る
The purposes of this study were to examine the relationships between various force-time parameters and muscle oxygenation kinetics during maximal sustained isometric grip (SIG) and maximal repeated rhythmic grips (RRG) with different grip intervals (interval times: 5, 4, 3, and 2 s). Subjects were 10 healthy young males, aged 20-26 years (height 173.9±7.3 cm, body mass 71.5±11.2 kg). After measuring maximal grip force, each subject performed the SIG and RRG tests with a target frequency of 12, 15, 20, and 30 grips・min^<-1> (interval times: 5, 4, 3, and 2 s, respectively) for 6 min. The decreasing time until 80% MVC showed significant and high correlations with final force values in RRGs with over 3 s intervals (r=0.866-0.941), but not in the SIG and RRG with a 2 s interval. The time at the lowest Oxy-Hb/Mb value showed a significant and high correlation with the time at the highest Deoxy-Hb/Mb value only in the SIG and RRG with a 2 s interval (r=0.825-0.916). Oxy-Hb/Mb decreases markedly and deoxy-Hb/Mb increases after the onset of SIG due to the obstruction of blood flow caused by the increase in intramuscular pressure. A similar physiological response to that of SIG occurs also in RRG with a 2 s interval, but RRGs with intervals over 3 s achieve more resumption of blood flow in the muscular relaxation phase. Hence, in spite of the same RRGs, it was determined that RRGs with intervals over 3 s differ significantly in a changing pattern of grip force and muscle oxygen kinetics from RRGs with a 2 s interval.
- 日本生理人類学会の論文
著者
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Demura Shinichi
Faculty Of Education Kanazawa University
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Demura Shinichi
Kanazawa Univ. Graduate School Of Natural Sci. & Technol.
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Yamaji Shunsuke
University Of Fukui
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Yamaji Shunsuke
University Of Fukui Faculty Of Medical Science Morphological And Physiological Sciences Sports Medic
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Yamaji Shunsuke
Fukui National College Of Technology
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Demura Shinichi
Department Of Physical Education Kanazawa University
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Nakada Masakatsu
National Defense Academy
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Demura S
Graduate School Of Natural Science & Technology Kanazawa University
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Demura Shin-ichi
Department Of Physical Education Kanazawa University
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Nagasawa Yoshinori
Akita Prefectural University, Research and Education Center for Comprehensive Science
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Demura Shinichi
Kanazawa University
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Nakada Masakatsu
National Defense Acad.
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Yamaji Shunsuke
University Fukui Faculty Of Medical Sciences
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Nagasawa Y
Akita Prefectual University
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Nagasawa Yoshinori
Kyoto Pharmaceutical Univ. Dep. Of Health And Sports Sciences
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Nagasawa Yoshinori
Akita Prefectual University
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