@article{oai:kanazawa-u.repo.nii.ac.jp:00001025,
 author = {Demura, Shinichi and Nakada, Masakatsu and Yamaji, Shunsuke and Nagasawa, Yoshinori},
 issue = {3},
 journal = {Journal of physiological anthropology},
 month = {May},
 note = {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., 金沢大学人間社会研究域人間科学系},
 pages = {161--168},
 title = {Relationships between Force-Time Parameters and Muscle Oxygenation Kinetics during Maximal Sustained Isometric Grip and Maximal Repeated Rhythmic Grip with Different Contraction Frequencies},
 volume = {27},
 year = {2008}
}