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161.
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Ryan D. Burns James C. Hannon Timothy A. Brusseau Patricia A. Eisenman Barry B. Shultz Pedro F. Saint-Maurice 《Journal of sports sciences》2016,34(1):18-26
A popular algorithm to predict VO2Peak from the one-mile run/walk test (1MRW) includes body mass index (BMI), which manifests practical issues in school settings. The purpose of this study was to develop an aerobic capacity model from 1MRW in adolescents independent of BMI. Cardiorespiratory endurance data were collected on 90 adolescents aged 13–16 years. The 1MRW was administered on an outside track and a laboratory VO2Peak test was conducted using a maximal treadmill protocol. Multiple linear regression was employed to develop the prediction model. Results yielded the following algorithm: VO2Peak = 7.34 × (1MRW speed in m s?1) + 0.23 × (age × sex) + 17.75. The New Model displayed a multiple correlation and prediction error of R = 0.81, standard error of the estimate = 4.78 ml kg?1·min?1, with measured VO2Peak and good criterion-referenced (CR) agreement into FITNESSGRAM’s Healthy Fitness Zone (Kappa = 0.62; percentage agreement = 84.4%; Φ = 0.62). The New Model was validated using k-fold cross-validation and showed homoscedastic residuals across the range of predicted scores. The omission of BMI did not compromise accuracy of the model. In conclusion, the New Model displayed good predictive accuracy and good CR agreement with measured VO2Peak in adolescents aged 13–16 years. 相似文献
163.
David. M. Kelly Anthony. J Strudwick Greg Atkinson Barry Drust Warren Gregson 《Journal of sports sciences》2016,34(14):1328-1332
ABSTRACTThe measurement of relative physiological stress during training is important because this is the stimulus for the long-term adaptive response. Measurements of perceived exertion (RPE) have been reported to correlate with the heart rate during field-based training sessions. Nevertheless, there are few studies on how well RPE tracks with the heart rate over repeated training sessions in elite soccer players. Therefore, we aimed to quantify the within-participant correlations between variability in session-RPE (sRPE) and the heart rate in elite male soccer players, and to determine whether the playing position moderated these correlations. The field-based training of four central defenders, four wide defenders, six central midfielders, two wide midfielders and three attackers from an elite English Premier League squad were monitored over an entire in-season competitive period, giving a total of 1010 individual training sessions for study. Correlations between session-RPE and heart rates were quantified using a within-participant model. The correlation between changes in sRPE and heart rates was r = 0.75 (95% CI: 0.71–0.78). This correlation remained high across the various player positions (wide-defender, r = 0.81; central-defender, r = 0.74; wide midfielder, r = 0.70; central midfielder, r = 0.70; attacker, r = 0.84; P < 0.001). The correlation between changes in RPE and heart rates, measured during a season-long period of field-based training, is high in a sample of elite soccer players. 相似文献
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Margaret Carlisle Duncan Barry Brummett 《Research quarterly for exercise and sport》2013,84(2):168-177
Abstract This study employs the theory of “media logic” and the method of hermeneutical criticism to demonstrate some effects of a major social institution, television, on the “text” of experiencing spectator sports. The study finds that the medium of television makes spectator sports into an experience which incorporates narrative, intimacy, commodification, and rigid time segmentation. The conventions imposed by television on spectator sports are presented here as powerfully affecting the meanings which televised sports have for their audiences. 相似文献
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Lorrae Ward Lexie Grudnoff Barry Brooker Mary Simpson 《Asia Pacific Journal of Education》2013,33(1):68-80
Concerns around the provision and retention of quality teachers are global. Amongst these concerns are the preparedness of graduate teachers and the quality and nature of teacher education. The purpose of the article is to focus questions of teacher preparedness and education within a wider discussion around the professional life-cycle of teachers. Initial teacher education is viewed as the first phase of the professional life-cycle of a teacher; part of a professional continuum of learning and expertise, rather than a distinct preparatory phase. We do not present a detailed model for this continuum; believing there is still significant work to be done on defining and delineating the levels of expertise. Such work is beyond the scope of this paper. We do provide a starting point for further consideration. Further, we suggest a scaffolded transition, determined by the learning needs of teachers, between initial teacher education and induction, moving to in-service learning, with closer connections between providers and schools to mitigate against a disconnect between these phases of development. The potential role of professional standards in supporting teacher learning across the professional life-cycle is also discussed. 相似文献
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Barry G. Sheckley 《Community College Journal of Research & Practice》2013,37(2):165-175
Relationships between self‐directed learning projects of adults and the directed learning activities comprising a community college curriculum need to be developed and clarified. Learning projects are defined as a series of related episodes where individuals intentionally spend seven or more hours to gain and retain fairly certain knowledge, information or skills. Trained interviewers used a structured interview format to investigate a total of 290 learning projects conducted by 41 males enrolled in a community college. During the 12 months preceeding the interview, subjects completed an average of 7 learning projects, devoting an average of 285 hours to each learning project. The learning projects were self‐directed (56%), for immediate or future use (57%), not motivated by academic credit (79%), acquired information from another person (57%), and resulted in a large amount of knowledge gained (63%). The results suggest that, even when adults are enrolled in a formal academic program, their learning projects are self‐directed, intrinsically motivated, and pragmatically oriented. The findings imply that: (a) procedures to utilize intrinsic motivation could be more widely employed in curricula design; and (b) the teacher of adults would best serve students as a facilitator who guides and supports learning. 相似文献