Teacher attitudes on coping with grief in the public school classroom     

Jon K. Reid  Wayne A. Dixon 《Psychology in the schools》1999,36(3):219-229

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Spatial characteristics of professional tennis serves with implications for serving aces: A machine learning approach     

David Whiteside  Machar Reid 《Journal of sports sciences》2017,35(7):648-654

This study sought to determine the features of an ideal serve in men’s professional tennis. A total of 25,680 first serves executed by 151 male tennis players during Australian Open competition were classified as either aces or returned into play. Spatiotemporal (impact location, speed, projection angles, landing location and relative player locations) and contextual (score) features of each serve were extracted from Hawk-Eye data and used to construct a classification tree model (with decision rules) that predicted serve outcome. k-means clustering was applied to the landing locations to quantify optimal landing locations for aces. The classification tree revealed that (1) serve directionality, relative to the returner; (2) the ball’s landing proximity to the nearest service box line and (3) serve speed classified aces with an accuracy of 87.02%. Hitting aces appeared more contingent on accuracy than speed, with serves directed >5.88° from the returner and landing <15.27 cm from a service box line most indicative of an ace. k-means clustering revealed four distinct locations (≈0.73 m wide × 2.35 m deep) in the corners of the service box that corresponded to aces. These landing locations provide empirically derived target locations for players to adhere to during practice and competition.  相似文献   

Acute and chronic effect of sodium bicarbonate ingestion on Wingate test performance: a systematic review and meta-analysis     

João Paulo Lopes-Silva  Reid Reale  Emerson Franchini 《Journal of sports sciences》2019,37(7):762-771

The aim of this study was to perform a systematic review and meta-analysis on the acute and chronic effects of sodium bicarbonate (NaHCO₃) ingestion on Wingate performance. Following a search through PubMed, Scopus and Web of Science, 9 studies were found meeting inclusion criteria (6 acute and 3 chronic). Random-effects meta-analysis of standardized mean difference (SMD) for peak and mean power was performed. Study quality was assessed using the QualSyst. Results of the meta-analysis showed that acute ingestion of NaHCO₃ did not improve Wingate test peak (weighted average effect size Hedges’s g = 0.02, 95%CI: – 0.19 to 0.23, P = 0.87) or mean power (weighted average effect size Hedges’s g = 0.15, 95%CI: ?0.06 to 0.36, P = 0.92). However, chronic ingestion of NaHCO₃ improved Wingate test peak (weighted average effect size Hedges’s g = 1.21, 95%CI: 0.83 to 1.42, P = 0.001) and mean power (weighted average effect size Hedges’s g = 1.26, 95%CI: 0.96 to 1.56, P = 0.001). Quality assessment of selected articles was classified as strong. This meta-analysis provides evidence that chronic, but not acute, ingestion of NaHCO₃ increases both Wingate test peak and mean power.  相似文献   

Why Olympia matters for modern sport     

Heather L. Reid 《体育哲学杂志》2017,44(2):159-173

From the modern scientific perspective, Olympia is a ruin at the far end of a fading sense of history that represents little more than the origins from which sport has continuously evolved. Quantitative measurements show continued increases in human performance, equipment efficiency and funding. But some question this athletic evolution. We worry about qualitative issues, such as virtue, meaning and beauty. The source of this contrast is a difference in values: Olympic vs. Efficiency values. Such values establish an ethos in sporting communities that influences how we behave, explain and even conceptualize our activities. I argue from the perspectives of metaphysics, epistemology, aesthetics, ethics and politics, that Olympic Ethos is needed to balance out the modern Efficiency Ethos, which threatens to dehumanize sport.  相似文献   

Individualised dietary strategies for Olympic combat sports: Acute weight loss,recovery and competition nutrition     

Reid Reale  Gary Slater  Louise M. Burke 《European Journal of Sport Science》2017,17(6):727-740

Olympic combat sports separate athletes into weight divisions, in an attempt to reduce size, strength, range and/or leverage disparities between competitors. Official weigh-ins are conducted anywhere from 3 and up to 24?h prior to competition ensuring athletes meet weight requirements (i.e. have ‘made weight’). Fighters commonly aim to compete in weight divisions lower than their day-to-day weight, achieved via chronic and acute manipulations of body mass (BM). Although these manipulations may impair health and absolute performance, their strategic use can improve competitive success. Key considerations are the acute manipulations around weigh-in, which differ in importance, magnitude and methods depending on the requirements of the individual combat sport and the weigh-in regulations. In particular, the time available for recovery following weigh-in/before competition will determine what degree of acute BM loss can be implemented and reversed. Increased exercise and restricted food and fluid intake are undertaken to decrease body water and gut contents reducing BM. When taken to the extreme, severe weight-making practices can be hazardous, and efforts have been made to reduce their prevalence. Indeed some have called for the abolition of these practices altogether. In lieu of adequate strategies to achieve this, and the pragmatic recognition of the likely continuation of these practices as long as regulations allow, this review summarises guidelines for athletes and coaches for manipulating BM and optimising post weigh-in recovery, to achieve better health and performance outcomes across the different Olympic combat sports.  相似文献   

Now you see,now you don’t … the influence of visual occlusion on racket and ball kinematics in the tennis serve     

Georgia Giblin  David Whiteside  Machar Reid 《Sports biomechanics / International Society of Biomechanics in Sports》2017,16(1):23-33

The serve is considered amongst the most important strokes in tennis. Not surprisingly, the development of a mechanically consistent and proficient serve is paramount. Correspondingly, drills that involve players serving with their eyes closed are thought to promote mechanical consistency. The purpose of this study was therefore to contrast the effect of the removal of visual feedback on ball and racket kinematics in the serve. A 10-camera 500-Hz VICON MX motion analysis system recorded the service actions of eight elite young players as they performed three serves with eyes open and three serves with eyes closed. Removal of vision resulted in considerable differences in both racket and ball kinematics, with players failing to make contact on 16 of 24 serves. Temporally, the preparation phase was significantly shorter with eyes closed. Spatially, the ball was located 6.5 cm further to the right at zenith, and 13 cm higher at impact with eyes closed. These results highlight that the serve is not entirely pre-programmable, and that visual feedback is critical to the spatiotemporal regulation of the serve. In turn, coaches need to be aware of the implications of modifying visual feedback in serve, and ensure that the consequence is congruent with their intent.  相似文献   

Career evolution and knowledge of elite coaches of swimmers with a physical disability     

Cregan K  Bloom GA  Reid G 《Research quarterly for exercise and sport》2007,78(4):339-350

In the last decade there has been an increase in empirical research on coaches of elite able-bodied athletes, while coaches of athletes with a disability have generally been overlooked. Thus, the purpose of the current study was to address this oversight by examining the career evolution and knowledge of these coaches. Six elite coaches of swimmers with a physical disability were interviewed using an unstructured, open-ended interview format. Results revealed information pertaining to the coaches' backgrounds, career evolution, and knowledge in training and competition. As well, all coaches stressed the importance of coaching their athletes as an elite swimmer as opposed to coaching a swimmer with a disability.  相似文献   

The future of the IMC's     

W R Reid  W S Wright 《Exceptional children》1968,35(3):319-320

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