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91.
Matt Spencer Steven Lawrence Claire Rechichi David Bishop Brian Dawson Carmel Goodman 《Journal of sports sciences》2013,31(9):843-850
Limited information exists about the movement patterns of field-hockey players, especially during elite competition. Time–motion analysis was used to document the movement patterns during an international field-hockey game. In addition, the movement patterns of repeated-sprint activity were investigated, as repeated-sprint ability is considered to be an important fitness component of team-sport performance. Fourteen members of the Australian men's field-hockey team (age 26±3 years, body mass 76.7±5.6?kg, [Vdot]O2max 57.9±3.6?ml?·?kg?1?·?min?1; mean±s) were filmed during an international game and their movement patterns were analysed. The majority of the total player game time was spent in the low-intensity motions of walking, jogging and standing (46.5±8.1, 40.5±7.0 and 7.4±0.9%, respectively). In comparison, the proportions of time spent in striding and sprinting were 4.1±1.1 and 1.5±0.6%, respectively. Our criteria for ‘repeated-sprint’ activity (defined as a minimum of three sprints, with mean recovery duration between sprints of less than 21?s) was met on 17 occasions during the game (total for all players), with a mean 4±1 sprints per bout. On average, 95% of the recovery during the repeated-sprint bouts was of an active nature. In summary, the results suggest that the motion activities of an elite field-hockey competition are similar to those of elite soccer, rugby and Australian Rules football. In addition, the investigation of repeated-sprint activity during competition has provided additional information about the unique physiological demands of elite field-hockey performance. 相似文献
92.
Lawrence F. Locke 《Research quarterly for exercise and sport》2013,84(3):418-429
Abstract The purpose of this study was to inquire into the validity of certain aspects of the public image of the physical educator through the use of selected psychological test instruments, and to assess these factors in a group of administration oriented physical educators. The performances of the physical educators differed significantly from those of a group of classroom teachers on each of three psychological measures. The direction of some of the differences provides support for the public image of the physical educator. Conclusions must be modified by the fact that a high degree of overlap exists between the performance distributions of the two groups and by the observation that the differences were altered sharply by experimental changes in the membership of the physical education group. 相似文献
93.
Abstract Five trials on the stabilometer were administered to 274 EMR children ages 6 to 13 years and 151 normal children ages 6 to 9 years. Older EMR boys and girls had slightly more board movement than younger EMR children whereas there was a tendency for board movement to decrease with age for the normal children. There were no appreciable sex differences between the EMR and the normal age groupings with the exception that board movement of the young EMR boys was significantly less than that of the young and old EMR girls. Normal children had significantly less board movements than EMR children at all age levels. There was some decrease in relative intra-individual variability with increasing age for both EMR and normal children but normal children were more efficient in early learning than EMR children. 相似文献
94.
Justin P. Hardee Marcus M. Lawrence Kevin A. Zwetsloot N. Travis Triplett Alan C. Utter 《Journal of sports sciences》2013,31(5):488-496
Abstract The purpose of this investigation was to examine the effects of cluster set configurations on power clean technique. Ten male, recreational weightlifters performed three sets of six repetitions at 80% of one repetition max with 0 (P0), 20 (P20) or 40 seconds (P40) inter-repetition rest. During the first and second set of P0, the catch and first pull were in a more forward position during repetition 6 as compared to repetition 1, respectively. During the second set of P40, differences in horizontal displacement were found between repetitions 1 and 6 for the second pull and the loop. During the third set of P40, differences in horizontal displacement were found between repetitions 1 and 6 for the first pull, transition, and beginning of the second pull. No differences in horizontal displacement were found between repetitions 1 and 6 during P20. During each set of P0, vertical displacement decreased between repetitions 1 and 6 (1.02 ± 0.07 m vs. 0.94 ± 0.06 m; Mean ± s). Cluster set configurations led to the maintenance of vertical displacement throughout all sets. The results demonstrate cluster set configurations with greater than 20 seconds inter-repetition rest maintain weightlifting technique to a greater extent than a traditional set configuration. 相似文献
95.
96.
Michael J. Falvo Brian K. Schilling Lawrence W. Weiss 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):293-311
Power is an integral aspect of many sports. Although power output of the lower body is often measured during jumping and cycling movements, much less is known about power as pertains to the upper body musculature. Recently, isoinertial methods ‐ with constant gravitational load ‐ of power testing have become common, but little is known of the reliability and criterion validity of these tests as they pertain to sport performance. In addition, the varied methodology makes a lucid model more evasive. The aims of this review are to examine the various methods of assessing upper body power, to establish its role in predicting athletic performance, and to assess the body of literature that has assessed power output of the upper extremities by isoinertial methods. To our knowledge, only two studies on isoinertial upper‐body power have shown a direct correlation to sporting ability (Baker, 2001; Baker et al., 2001); therefore, many unanswered questions exist as to the efficacy of these tests as predictors of athletic ability or as a method to track athletes’ training over time. From this review we hope to allow the sport coach to assess the overall utility of these tests in terms of availability, safety and external validity. 相似文献
97.
Robert L. Linn Margret Buchmann Bruce Gould Thomas Kellaghan Dal Lawrence Phil C. Robinson Perry Zirkel 《Journal of Personnel Evaluation in Education》1989,2(3):199-214
Michigan State UniversityAir Force Human Resources Laboratory 相似文献
98.
Curriculum development through Delphi 总被引:1,自引:0,他引:1
This article reports on the use of the Delphi method for curriculum design in higher education. The basic Delphi methodology is outlined along with possible goals and objectives in a Delphi study. The results of an actual case study in the use of the Delphi method for curriculum development are reported. Attention is given to the problem of selecting participants for a Delphi exercise, followed by recommendations for future research. 相似文献
99.
The influence of a 3-week institute upon secondary biology and earth science teachers regarding their experiences with respect to the teaching of evolution was investigated. The institute directors, with National Science Foundation (NSF) funding, hoped to foster an understanding of the nature of science, provide enhanced content, and support a forum for teachers to discuss problems common to the teaching of evolution. Analysis of data indicated statistically significant increases in participants' acceptance of the theory of evolution and their understanding of both applied evolutionary principles and the applied nature of science. In addition, a significant reduction in participants' perceived anxieties regarding the teaching of evolution was achieved. Further, a qualitative examination of Stages of Concern (SoC) profiles indicated a slight shift by participants toward the use of more student-centered instruction. Finally, data were collected from 9 of the original 19 participants at a voluntary follow-up session, 8 months after the formal institute. Scores from all of the data-collection instruments (with the exception of SoC profiles) exhibited a slight decline. These decreases were not, however, statistically significant. Examination of SoC profiles, however, indicated a much stronger adoption by follow-up participants for the use of student-centered instructional strategies for the teaching of evolution. 相似文献
100.
Recognition and Multiculturalism in Education 总被引:2,自引:0,他引:2
Lawrence Blum 《Journal of Philosophy of Education》2001,35(4):539-559
Charles Taylor's 'Politics of Recognition' has given philosophical substance to the idea of 'recognition' and has solidified a link between recognition and multiculturalism. I argue that Taylor oversimplifies the valuational basis of recognition; fails to appreciate the difference between recognition of individuals and of groups; fails to articulate the value of individuality; fails to appreciate the difference between race and ethnoculture as dimensions of identity; and fails to appreciate equality as a recognitional value. The value of recognition in education goes beyond multiculturalism, and the reasons for multiculturalism go far beyond recognitional concerns. 相似文献