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11.
Reyes GF Dickin DC Crusat NJ Dolny DG 《Sports biomechanics / International Society of Biomechanics in Sports》2011,10(4):280-293
The purpose of this study was to evaluate the effects of whole-body vibration (WBV) on the muscle recruitment of selected upper and lower body muscles during the baseball swing. Participants were recreationally trained males (n = 16, 22 +/- 2 years, 181.4 +/- 7.4 cm, 84.7 +/- 9.0 kg), with previous baseball experience. Subjects participated in three randomized sessions on separate days, consisting of three sets of five swings offa hitting tee. Exercises (upper and lower body dynamic and static movements) with or without WBVexposure were performed between swing sets. During each swing, the gastrocnemius, biceps femoris, gluteus maximus, pectoralis major, latissimus dorsi, and triceps brachii were evaluated for electromyographic (EMG) activity. EMG values were normalized to EMG measured during maximal voluntary isometric contraction. Statistical analysis revealed no significant differences in EMG activity across the three treatments. In addition, the results displayed a specific muscle recruitment order during the swing, starting with the lower body followed by the upper body muscles. This study was the first to report the recruitment order during the baseball swing. Although acute exposure to WBV did not significantly alter the muscle recruitment, these results may prove useful for practitioners looking to enhance baseball swing performance. 相似文献
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Gabriel Weimann 《Int J Intercult Relat》1984,8(2):185-197
The present study sets out to uncover young Israelis' perceptions of the American reality using the postulates and methodology of the cultivation analysis approach to mass communication. The comparison of the perceptions of “light” and “heavy” T.V. viewers with measures of the actual reality reveals that heavy viewers demonstrate a strong and consistent tendency to paint a rosier picture of life in the U.S., in terms of wealth and standard of living, even when other factors (age, gender, residence and ethnic group) are held constant. The findings of this study have methodological implications concerning the study of media effects as well as theoretical implications regarding the ongoing debate on “media imperialism.” 相似文献
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Gustavo Leporace Marcio Tannure Gabriel Zeitoune Leonardo Metsavaht Moacir Marocolo Alex Souto Maior 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(3):411-420
AbstractThe aim of this study was to test the correlation between knee-to-hip flexion ratio during a single leg landing task and hip and knee strength, and ankle range of motion. Twenty-four male participants from a professional soccer team performed a continuous single leg jump-landing test during 10s, while lower limb kinematics data were collected using a motion analysis system. After biomechanical testing, maximal isometric hip (abduction, extension, external rotation), knee extension and flexion strength were measured. Maximum ankle dorsiflexion range of motion was assessed statically using the weight bearing lunge test. Pearson correlation coefficients were calculated to determine the associations between the predictor variables (knee and hip strength, and ankle ROM) and the main outcome measure (knee-to-hip flexion ratio). Correlation between knee-to-hip flexion ratio and hip abductors strength was significant (r = ?0.47; p = 0.019). No other significant correlations were observed among the variables (p > 0.05). These results demonstrated that a lower hip abductors strength in male soccer players was correlated with a high knee-to-hip flexion ratio during landing from a single leg jump, potentially increasing knee overload by decreasing energy absorption at the hip. The results provide a novel proposal for the functioning of hip muscles to control knee overload. 相似文献
15.
Gabriel Simiyu Ronald Bonuke Joyce Komen 《Journal of Marketing for HIGHER EDUCATION》2020,30(1):66-86
ABSTRACT Using cross-sectional data from 504 students from four Kenyan universities, this study evaluates the indirect effect of brand personality on the relationship between social media and students’ behavioral intentions to enroll in postgraduate studies. Additionally, the study examines the moderating effect of attitude on the relationship between social media and brand personality, social media and students’ behavioral intentions, brand personality and students’ behavioral intentions. Finally, it investigates the moderating effect of attitude on the indirect process of brand personality on the relationship between social media and students’ behavioral intentions. The study is guided by the Theory of Planned Behavior, Technology Acceptance Model and Self Congruity Theory. Process Macro is used to analyze data. Results indicate that social media significantly predicts students’ behavioral intentions and this relationship is partially mediated by brand personality. Besides, attitude moderates the relationship between social media and students’ behavioral intentions and also the relationship between brand personality and students’ behavioral intentions. Finally, attitude has a conditional effect on the indirect relationship between social media and student’s behavioral intentions via brand personality and this effect is much stronger with a higher level of attitude. These findings contribute new knowledge to literature and theory. 相似文献
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Gabriel Haim 《Research in higher education》1981,15(4):291-304
This article focuses on the extent to which styles of research could account for academic ideologies, concerning both faculty and student affairs, among academic researchers in sociology, psychology, political science, and education. The hypothesis maintains that researchers in all four fields who favor styles of research which compete successfully are likely to take a conservative attitude toward student and faculty affairs. In contrast, researchers who favor styles of research which compete less successfully are likely to take an attitude favoring changes. The results confirm the hypothesis mainly among faculty in psychology and very little among faculty in other fields. The data are based on a secondary analysis of data collected by Ladd and Lipset in their 1975 Survey of the American Professoriate. 相似文献
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The study examined whether schools for the deaf were providing services to assist parents in communicating with their children about sexuality (including sexual signs) and whether parents were involved in the sexuality education curriculum within their child's school. The Sexuality Curriculum Questionnaire for Educators of Students Who Are Deaf (Getch & Gabriel, 1998) was completed by 71 educators teaching sexuality curricula in schools for the deaf across the United States. Results indicated that parents were more likely to be involved in approval and development of their children's sexuality education than to receive assistance with sexuality education from the schools. Although the level of parental participation in curriculum development and approval is encouraging, the number of parents actually participating in curriculum development and approval remains low. 相似文献
20.
Alain Quiamzade Gabriel Mugny Agatta Dragulescu Cléopas Céline Buchs 《European Journal of Psychology of Education - EJPE》2003,18(4):389-404
An experiment examined the conditions under which an expert source induces less competent targets to adopt a point of view
contradicting their own in a context of information transmission. In a 2×2 factorial design participants (N=86) were either
1st year or 4th year university students, and the style of the message delivered by the epistemic authority was either authoritarian
or democratic. The main dependent variable was the degree to which participants went beyond mere approval and adopted the
contradicting information. The principal finding was that the contradicting information was adopted more readily by the 1st
year participants confronted with an authoritarian as compared to a democratic expert source. Students in their 4th year were
more influenced by a democratic source than the 1st year students. These results partially confirm the correspondence hypothesis
according to which appropriation of knowledge from an expert source is favoured when the characteristics of the influence
relations match fundamental expectations that individuals have concerning this relationship, these expectations varying as
a function of the stage they have reached in their university education. 相似文献