The longest journeys in Super Rugby: 11 years of travel and performance indicators     

Michele Lo  Robert J. Aughey  William G. Hopkins  Nicholas Gill 《Journal of sports sciences》2013,31(18):2045-2050

ABSTRACT

Regular air travel is common in sport. The aim of this study was to understand the extent to which travel has affected Super Rugby teams’ performance from 2006, the first season with available Key Performance Indicators (KPIs), to 2016. Data were analysed with mixed linear models for the effects of number of time-zones crossed (east or west), travel duration, the away-match disadvantage, difference in ranking, a set of amendments to the laws of Rugby Union in 2008, a change in competition format (introduction of a conference system) in 2011, and a secular trend. In 2006, the predicted combined effects of travelling 24 h across 12 time-zones and playing away were trivial or small and negative but generally unclear for most of the KPIs in both directions of travel. In 2016 more effects were clear, small and negative for westward travel, while most effects for eastward travel were clear, small to moderate and negative. Most KPIs showed small to moderate increases over the 11 years, while difference in ranking, the introduction of new rules and game format led to mostly small changes. Changes in the physical demands of the game, and inadequate recovery time for long-haul travel can explain these effects.  相似文献   

Out of your zone? 21 years of travel and performance in Super Rugby     

Michele Lo  Robert J. Aughey  William G. Hopkins  Nicholas Gill 《Journal of sports sciences》2013,31(18):2051-2056

ABSTRACT

The extent to which travel has affected Super Rugby teams’ performances was analysed using outcomes of all matches played from the beginning of the competition in 1996 to the end of the 2016 season. Points difference and matches won or lost were predicted with general and generalized mixed linear models. The predictors were the linear effects of number of time zones crossed and travel duration based on the teams’ locations for each match and their locations in the previous week. The away-match disadvantage was also estimated, along with trends in all these effects. In 1996 the predicted combined effect of eastward travel across 12 time zones was a reduction of 5.8 points scored per match, resulting in 4.1 more matches lost every 10 matches. Corresponding effects for westward travel were 6.4 points and 3.1 matches. In 2016 effects travelling eastward were 3.7 points and 2.3 matches, whereas travelling westward the effects were 3.7 points and 1.5 matches. These travel effects were due mainly to the away-match disadvantage: 5.7 points and 3.2 matches in 1996; 5.2 points and 2.3 matches in 2016. Teams in Super Rugby are dealing successfully with long-haul travel and should now focus on reducing the away-match disadvantage.  相似文献   

An Examination of Personal/Situational Variables,Stress Appraisal,and Burnout in Collegiate Teacher-Coaches     

Betty C. Kelley Ph.D.  Diane L. Gill 《Research quarterly for exercise and sport》2013,84(1):94-102

Abstract

Following Smith's (1986) cognitive-affective model of stress and burnout in athletics, this investigation examined (a) the relationship of personal/situational variables (social support, gender, and years of experience) to stress appraisal and (b) the relationship of stress appraisal (perceived stress, coaching issues, and role conflict) to burnout. Male (n = 99) and female (n = 115) teacher-head basketball coaches from NCAA Division III and NAIA colleges completed established measures of burnout, perceived stress, teacher—coach role conflict, and social support and a measure of coaching issues developed for this study. Multivariate analyses supported the hypothesized relationships. Specifically, greater satisfaction with social support, less experience, and gender (females higher) were related to stress appraisal, and all stress appraisal variables were positively related to burnout. Contrary to previous studies, these teacher—coaches reported moderate to high levels of burnout.  相似文献   

The Relationship of Self-Efficacy and Perceived Well-Being to Physical Activity and Stair Climbing in Older Adults     

Diane L. Gill PhD  Betty C. Kelley  Kathleen Williams  Jeffrey J. Martin 《Research quarterly for exercise and sport》2013,84(4):367-371

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Comparison of the Validity of Four Fall-Related Psychological Measures in a Community-Based Falls Risk Screening     

Delilah S. Moore  Rebecca Ellis  Maria Kosma  Jennifer M. Fabre  Kevin S. McCarter  Robert H. Wood 《Research quarterly for exercise and sport》2013,84(3):545-554

Abstract

We examined the measurement properties of fall-related psychological instruments with a sample of 133 older adults (M age = 74.4 years, SD = 9.4). Measures included the Comprehensive Falls Risk Screening Instrument, Falls-efficacy Scale-International (FES-I), Activities-specific Balance Confidence (ABC), modified Survey of Activities and Fear of Falling in the Elderly (mSAFFE), Consequences of Falling (CoF), Physical Activity Scale for the Elderly (PASE), and 36-Item Short-Form Health Survey (SF-36). The FES-I, ABC, mSAFFE, and CoF were significantly correlated with each other, with SF-36, and with mobility. The ABC and mSAFFE were significantly correlated with PASE. The ABC differentiated between fallers and nonfallers and predicted total falls risk. Findings can assist with the selection of psychological instruments in a falls risk screening context.  相似文献   

Designing System Dualities: Characterizing a Web-Supported Professional Development Community     

Sasha A. Barab  James G. MaKinster  Rebecca Scheckler 《The Information Society》2013,29(3):237-256

In this article we focus on the challenges we have encountered in attempting to support the development of an online community of practice for grade 5-12 mathematics and science teachers. Specifically, this project involves the design and evaluation of an electronic knowledge network, the Inquiry Learning Forum (ILF), a web-based professional development system designed to support a community of practice (CoP) of in-service and preservice mathematics and science teachers who are creating, reflecting upon, sharing, and improving inquiry-based pedagogical practices. This research examines the interplay among a variety of variables that characterize the dynamics of building a social network through which participating teachers will seek to share and improve their pedagogical practices. Our research suggests that designing for virtual communities involves balancing and leveraging complex dualities from the "inside" rather than applying some set of design principles from the "outside." This research provides an illuminative case study from which others can more readily identify patterns occurring in their own interventions and navigate the challenges they face more intelligently.  相似文献   

Cooperation,competition and coopetition in innovation communities     

Rebecca Liu 《普罗米修斯》2013,31(2):91-105

This study explores competitors’ engagement in innovation communities. Some view working with competitors as a risky endeavour, some see it as potentially beneficial and others take it as something in-between. We address this issue by posing two questions: (1) why do rival firms cooperate, compete or ‘coopete’ (a syncretic approach); and (2) how do rival firms engage in these activities? To achieve this, we first review the relevant literature to construct conceptual arguments, and then investigate three innovation communities in the UK. The findings concern the importance of common and conflicting interests as fundamental drivers of a firm’s cooperative and competitive stance in an innovation community. While a ‘win–win’ strategy has been over-emphasised, data reveal that the fear of ‘lose–lose’ is vital to drive firm cooperation. Finally, our study suggests that rival relationships link to a strategic incentive alignment between common and conflicting interests; that is, rivals cooperate when common interests are higher, and compete on other occasions. Data seem to suggest that in a conflicting situation firms often maximise their private benefits at the expense of common interests. Data also suggest that this alignment varies in different innovation stages and in both an inter-organisational and an intra-organisational setting. This paper contributes to the existing work on the competitive/relational strategy of firms in the innovation space.  相似文献   

Lower-body compression garments worn following exercise improves perceived recovery but not subsequent performance in basketball athletes     

Rebecca Atkins  Wing-Kai Lam  Aaron T. Scanlan  C. Martyn Beaven 《Journal of sports sciences》2020,38(9):961-969

ABSTRACT

This study examined the effects of lower-body compression garments on perceived recovery and subsequent performance in basketball athletes. In a parallel-group design, 30 recreational, male basketball athletes were randomly allocated to either a control (CON, n = 15, loose-fitting clothing) or experimental group (COMP, n = 15, compression garments) for 15 h following fatigue-inducing, basketball-specific exercise in the evening (1600-1800 h). Perceptual measures of fatigue and muscle soreness, as well as physical performance tests (sprints, jumps and agility), were performed pre-exercise, post-exercise, and post-recovery (15 h following exercise). Subjective and objective measures of sleep were recorded following the exercise trial. There were non-significant (p > 0.05), unclear-trivial differences between groups for all performance measures. Perceived post-recovery fatigue (d = ?1.27, large) and muscle soreness (d = ?1.61, large) were significantly lower in COMP compared to CON (p < 0.05). COMP exhibited better perceived sleep quality (d = 0.42, small, p = 0.18) than CON, with an unclear difference in sleep duration between groups (p > 0.05). Wearing lower-body compression garments overnight improved perceived fatigue and muscle soreness, but had negligible effects on subsequent physical performance in basketball athletes. Future research should focus on longer periods of compression wear following fatiguing exercise.  相似文献   

Imaging the cadavers being dissected does not appear to improve the gross anatomy dissection experience          下载免费PDF全文

Rebecca S. Lufler Ph.D.  Ann C. Zumwalt Ph.D. 《Anatomical sciences education》2014,7(1):78-79

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The Next Big Idea: A Framework for Integrated Academic and Behavioral Intensive Intervention          下载免费PDF全文

Laura Berry Kuchle  Rebecca Zumeta Edmonds  Louis C. Danielson  Amy Peterson  T. Chris Riley‐Tillman 《Learning disabilities research & practice》2015,30(4):150-158

Despite advances in evidence‐based core instruction and intervention, many students with disabilities continue to achieve poor academic and behavioral outcomes. Many of these students are not sufficiently responsive to standardized programs and require more intensive, individualized supports. While many interventions and school problem‐solving teams focus primarily on either academic or behavioral concerns, students with the most intensive needs often have interrelated needs in both areas. The next big idea in special education should be to merge these efforts, building upon all that we have learned about problem solving at all levels of support, to improve outcomes for these students. Data‐based individualization provides a framework for integrating academic and behavioral problem solving and intervention.  相似文献