The Vietnamization of Stephen King     

Tony Magistrale  Michael J. Blouin 《Journal of American culture (Malden, Mass. : 2003)》2019,42(4):287-301

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Key somatic variables in young backstroke swimmers     

Senda Sammoud  Alan Michael Nevill  Yassine Negra  Raja Bouguezzi  Chaabene Helmi  Younés Hachana 《Journal of sports sciences》2019,37(10):1162-1167

The purpose of this study was to estimate the optimal body size, limb-segment length, girth or breadth ratios for 100-m backstroke mean speed performance in young swimmers. Sixty-three young swimmers (boys [n = 30; age: 13.98 ± 0.58 years]; girls [n = 33; age: 13.02 ± 1.20 years]) participated in this study. To identify the optimal body size and body composition components associated with 100-m backstroke speed performance, we adopted a multiplicative allometric log-linear regression model, which was refined using backward elimination. The multiplicative allometric model exploring the association between 100-m backstroke mean speed performance and the different somatic measurements estimated that biological age, sitting height, leg length for the lower-limbs, and two girths (forearm and arm relaxed girth) are the key predictors. Stature and body mass did not contribute to the model, suggesting that the advantage of longer levers was limb-specific rather than a general whole-body advantage. In fact, it is only by adopting multiplicative allometric models that the abovementioned ratios could have been derived. These findings highlighted the importance of considering somatic characteristics of young backstroke swimmers and can help swimming coaches to classify their swimmers and enable them to suggest what might be the swimmers’ most appropriate stroke (talent identification).  相似文献   

Facilitators and Barriers to Movement Integration in Elementary Classrooms: A Systematic Review     

Robert Dan Michael  Cate A. Egan  Lynda Nilges  Ali Brian  Robert Johnson 《Research quarterly for exercise and sport》2019,90(2):151-162

Purpose: A systematic review was conducted to identify facilitators and barriers to movement integration (MI) in elementary school classrooms. Method: Online databases (Educational Resources Information Center, Google Scholar, PsycINFO, and PubMed) served as data sources for the study. Following the PRISMA guidelines, relevant published research on MI was identified and screened for inclusion in a qualitative synthesis. Content analysis of the included articles (N = 28) was used to identify themes of MI facilitators and barriers. Facilitators and barriers were then categorized using a social-ecological framework. Results: A total of 12 themes of MI facilitators and barriers were identified and categorized into two social-ecological levels: institutional factors (e.g., administrative support, resources) and intrapersonal factors (e.g., teacher confidence, ease of implementation). Conclusion: This review can inform research and practice aimed at supporting the implementation of MI in elementary classrooms.  相似文献   

Sprint running kinematics and kinetics in pre-peak-height-velocity male children on a non-motorised treadmill: reliability and normative data     

Michael Clemens Rumpf  John Cronin  Jonathan Oliver  Michael Hughes 《Sports biomechanics / International Society of Biomechanics in Sports》2019,18(3):256-263

The purpose of this study was to quantify the reliability of kinematic and kinetic variables using a sample of pre-peak-height-velocity (PHV) male athletes sprinting on a non-motorised treadmill. Following variables were measured and their normative data presented, average and peak velocity, average and peak power, average and peak horizontal force, average and peak vertical force, average step frequency, average step length, average work. Twenty-five participants performed three 5-s all-out sprints from a standing split start on a non-motorised treadmill on three separate occasions. Per cent change in the means (-3.66 to 3.35%) and coefficients of variation (0.56–7.81%) were thought reliable for all variables. However, average step rate, average horizontal force and average vertical force did not meet the standards (≥0.70) set for acceptable intraclass correlation coefficients (ICC). Due to the homogeneous group, it was expected to receive low ICC values. Therefore, youth sprinting performance can be tested reliably on a non-motorised treadmill, especially if the per cent change in the mean and CV are deemed the important reliability measures. Normative data are given for the participant’s age as well as their maturity level for kinematic and kinetic variables.  相似文献   

Optimizing recovery to support multi-evening cycling competition performance     

Normand A Richard  Michael S Koehle 《European Journal of Sport Science》2019,19(6):811-823

Road criterium and track bicycle racing occur at high speeds, demand repeated high power outputs, last 10–90?min, and offer little chance for recovery after the event. Consecutive evenings of criterium and track racing are respectively known as speed-week or six-day events and take place in evening hours over the course of a week. Given the schedule and timing of these competitions, return to homeostasis can be compromised. No recommendations exist on how to optimize recovery for cyclists participating in these types of repeated evening competitions. Criterium and track cyclists spend considerable time, near and above the individual lactate threshold and therefore mostly utilize carbohydrate as their chief energy substrate. Henceforth, pre – and post-race nutrition and hydration is examined and recommendations are brought forward for carbohydrate, protein, and fluid intake. As evening high-intensity exercise perturbs sleep, strategies to optimize sleep are discussed and recommendations for an optimal sleep environment are given. Active recovery is examined, and the benefits of a short duration low intensity exercise reviewed. Passive recovery methods such as compression garments and cold water immersion are recommended, while evidence for massage, pneumatic compression devices, and neuromuscular electrical stimulation is still lacking. Optimizing recovery strategies will facilitate a return to the resting state following strenuous night competition.  相似文献   

Tranquility base,we've got red herrings on our scope     

Robert Michael McAvoy 《Performance Improvement》1981,20(3):14-25

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Videodisc conference report     

Michael Rutkaus 《Performance Improvement》1981,20(3):21-22

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State terminology of behavioral disorders     

Ted L. Miller  Michael H. Epstein 《Psychology in the schools》1979,16(2):224-229

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University-industry relationships in the life sciences: Implications for students and post-doctoral fellows     

Michael E. Gluck 《Research Policy》1987,16(6)

Growth in the industrial support of university research in the life sciences and more specifically in biotechnology has raised questions concerning its effects, both positive and negative, on the educational experiences of graduate students and post-doctoral fellows. A survey of 693 graduate students and post-doctoral fellows at six research intensive universities in the United States reveals that 19 percent of the responding students and fellows receive direct industry support for their research or training and that another 15 percent work with faculty advisors supported by industrial funds. On average students and fellows in this sample believe that the benefits of relationships with private firms outweigh the risks. In addition, students funded by private firms are more likely than those without industry connections to report patents resulting from their research. No relationship is found between industry support and young scientists' career plans or their rating of the quality of their educational experiences. However, the data suggest the existence of some risks: industry support is associated with fewer or delayed publications, inhibition of scientific communication on the part of some trainees, and some restrictions on students' and fellows' research. In a few cases, students are supported by funds from companies in which faculty advisors hold equity, a situation that creates potential conflicts of interest for students' mentors. To protect students, university administrators must monitor the relationships with industry that give rise to these potential problems. Future research into industrial support of research and training is needed to extend these results.  相似文献   

Touts out? The Waterson review on secondary ticketing     

Michael Rushton 《Cultural Trends》2016,25(4):287-290

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