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11.
Masayuki Konishi Masaki Takahashi Naoya Endo Shigeharu Numao Shun Takagi Masashi Miyashita 《Journal of sports sciences》2013,31(3):248-255
Abstract The aim of this study was to investigate the effects of sleep deprivation on autonomic and endocrine functions during the day and on exercise tolerance in the evening. Ten healthy young males completed two, 2-day control and sleep deprivation trials. For the control trial, participants were allowed normal sleep from 23:00 to 07:00 h. For the sleep deprivation trial, participants did not sleep for 34 h. Autonomic activity was measured from 19:00 h on day 1 to 16:00 h on day 2 by frequency-domain measures of heart rate variability. Endocrine function was examined by measuring adrenocorticotropic hormone and cortisol from venous blood samples collected on day 2 at 09:00, 13:00, and 17:00 h and immediately after an exercise tolerance testing. Autonomic regulation, particularly parasympathetic regulation estimated from the high-frequency component of heart rate variability analysis, was significantly higher in the sleep deprivation trial than in the control trial in the morning and afternoon of day 2. Plasma adrenocorticotropic hormone concentrations were significantly higher at 09:00 and 13:00 h of day 2 under sleep deprivation. Heart rate during exercise was significantly lower following sleep deprivation. Therefore, the effects of sleep deprivation on autonomic regulation depend on the time of the day. 相似文献
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Umeda T Suzukawa K Takahashi I Yamamoto Y Tanabe M Kojima A Katagiri T Matsuzaka M Totsuka M Nakaji S Sugawara N 《Journal of sports sciences》2008,26(9):897-904
To clarify the physical and mental fatigue caused by intense exercise and the relationship between the two types of fatigue, we examined changes in anthropometric and biochemical variables, neutrophil function, and the Profile of Mood States (POMS) questionnaire in 13 female university judoists attending a one-week training camp. Blood glucose, total cholesterol, haemoglobin, leukocyte count, IgG, and phagocytic activity all decreased after the training camp compared with baseline (P < or = 0.046). Aspartate aminotransferase, lactate dehydrogenase, creatine kinase, and neutrophil oxidative burst activity increased after the training camp (P < or = 0.007). Of the POMS scores, that for Fatigue increased after the training camp (P = 0.041) and that for Vigour decreased (P = 0.042). The changes in several POMS scores correlated with the changes in blood biochemical variables. In particular, the change in Total mood disturbance was negatively associated with changes in myogenic enzymes (P < or = 0.032). Our results suggest that intense exercise during training camps for female judoists leads to the appearance and accumulation of mental and physical fatigue, which are related to each other. 相似文献
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Cross‐cultural Similarities in Attitudes toward Computers and the Implications for Teacher Education
Gerald Knezek Keeko Miyashita Takashi Sakamoto 《Technology, Pedagogy and Education》2013,22(2):193-204
ABSTRACT Results of a three year longitudinal study of elementary school children's attitudes toward computers in Japan, Mexico, and the United States of America are presented, along with implications of the findings for teacher education. Two types of attitudes toward computers (importance and enjoyment) were found to be positively influenced by the introduction of computer activities in primary school. No novelty effect was found regarding enjoyment of computers, and perceived computer importance declined less from Grades 1–3 than several other dispositions measured. No consistent gender differences were found for attitudes toward computers among the three nations. These findings imply that students begin school eager to learn about computers and lacking the gender biases often found in older age groups, and that teachers should be educated to help preserve interest in and access to information technology for all students. Reflections for teacher education conclude the article. 相似文献
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宫下正兴 《黑龙江教育学院学报》2006,25(2):110-112
郭沫若在幼年时期,他的母亲就将自己喜爱的唐诗宋词教郭沫若暗诵,在他心里播下了诗的种子,养成对诗的爱好。在就读私塾时老师改革了教学方法,增设了诗歌,他得到了诗的第一步修行。在少年时期,去嘉州读书期间不仅得到了诗格培养,而且得到了人格的锻炼。在美与丑的矛盾中陶冶自己的人格。在成都时期,革命民主主义思想初步形成,发展了他的反抗叛逆精神,同时诗歌变成了他的斗争工具。他留学日本接触到泰戈尔、海涅、雪莱、歌德的诗,给他的诗带来了自由、奔放的浪漫主义色彩。 相似文献
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Kazuhiko Nunokawa Masashi Kuwayama 《International Journal of Science and Mathematics Education》2004,1(3):283-309
The purpose of this paper is to investigate the processes themselves where students appropriated mathematical ideas and to gain an insight into how they can appropriate those cultural ideas. For this purpose, two actual processes where 4th and 5th graders learned cultural practices involving mathematical ideas were closely analyzed, focusing upon the similarities and differences between the standard methods introduced by others and the methods the target students invented during their learning. Such analyses illustrated the following characteristics of their appropriation processes: (a) the students created kinds of hybrids of old ideas they had drawn upon and new ideas introduced by others; (b) when new ideas were presented by others, the students tried to interpret them in the framework of the old ideas they had drawn upon; (c) the students tended to use old ideas or kinds of hybrids until they realized the limits of old ideas and the values of new ideas. These characteristics were also discussed from the viewpoint of resistance and active learning observed in the intramental effects of intermental functioning. 相似文献