Effects of intense exercise on the physiological and mental condition of female university judoists during a training camp     

Takashi Umeda  Kazuhiro Suzukawa  Ippei Takahashi  Yousuke Yamamoto  Masaru Tanabe  Arata Kojima 《Journal of sports sciences》2013,31(9):897-904

Abstract

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 ≤ 0.046). Aspartate aminotransferase, lactate dehydrogenase, creatine kinase, and neutrophil oxidative burst activity increased after the training camp (P ≤ 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 ≤ 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   

Did Social Media Really Matter? College Students' Use of Online Media and Political Decision Making in the 2008 Election     

Matthew James Kushin  Masahiro Yamamoto 《Mass Communication and Society》2013,16(5):608-630

This study examined college students' use of online media for political purposes in the 2008 election. Social media attention, online expression, and traditional Internet attention were assessed in relation to political self-efficacy and situational political involvement. Data from a Web survey of college students showed significant positive relationships between attention to traditional Internet sources and political self-efficacy and situational political involvement. Attention to social media was not significantly related to political self-efficacy or involvement. Online expression was significantly related to situational political involvement but not political self-efficacy. Implications are discussed for political use of online media for young adults.  相似文献   

Intelligence,Creative Thinking,and Sociometric Choice Among Fifth-Grade Children     

Kaoru Yamamoto  Marlene L. Lembright  Ann M. Corrigan 《Journal of Experimental Education》2013,81(3):83-89

In a sample of 970 female and 968 male freshmen taken over a 5-year period at the College of Wooster it was found that the Math and Verbal Scholastic Aptitude Tests (SAT) were more highly correlated with freshman grade point average (GPA) than were any of the eighteen scales of the California Psychological Inventory (CPI). Stepwise regression led the author to suggest a series of five variables for each sex which might be used to predict academic achievement using the SAT and the CPI. For women, a multiple R of .52 was reached using Math, Verbal, Socialization, Achievement via Conformity, and Flexibility. For men, Math, Verbal, Socialization, Flexibility, and Femininity provided a multiple R of . 57.  相似文献   

Introduction     

Kaoru Yamamoto  Carol-Lynne Moore 《The Educational forum》2013,77(1)

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Reflections from the Desert     

Kaoru Yamamoto 《The Educational forum》2013,77(4)

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Musings from the Mountains     

Kaoru Yamamoto 《The Educational forum》2013,77(1)

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Creativity and norm conformity in fifth grade children     

K Yamamoto  C T Genovese 《Exceptional children》1965,32(4):257-258

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Reflections from the Desert     

Kaoru Yamamoto 《The Educational forum》2013,77(1):6-7

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Comparison of blood lactate levels between swimming in clothes and a swimsuit     

Ohkuwa T  Itoh H  Yamamoto T  Yamazaki Y  Sato Y 《Research quarterly for exercise and sport》2002,73(3):345-349

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The Benefits of Fixed Item Parameter Calibration for Parameter Accuracy in Small Sample Situations in Large‐Scale Assessments     

Christoph Knig  Lale Khorramdel  Kentaro Yamamoto  Andreas Frey 《Educational Measurement》2021,40(1):17-27

Large‐scale assessments such as the Programme for International Student Assessment (PISA) have field trials where new survey features are tested for utility in the main survey. Because of resource constraints, there is a trade‐off between how much of the sample can be used to test new survey features and how much can be used for the initial item response theory (IRT) scaling. Utilizing real assessment data of the PISA 2015 Science assessment, this article demonstrates that using fixed item parameter calibration (FIPC) in the field trial yields stable item parameter estimates in the initial IRT scaling for samples as small as n = 250 per country. Moreover, the results indicate that for the recovery of the county‐specific latent trait distributions, the estimates of the trend items (i.e., the information introduced into the calibration) are crucial. Thus, concerning the country‐level sample size of n = 1,950 currently used in the PISA field trial, FIPC is useful for increasing the number of survey features that can be examined during the field trial without the need to increase the total sample size. This enables international large‐scale assessments such as PISA to keep up with state‐of‐the‐art developments regarding assessment frameworks, psychometric models, and delivery platform capabilities.  相似文献