A person-centered approach to achievement goal orientations in competitive tennis players: Associations with motivation and mental toughness     

Richard Gregory Cowden  Nicolas Mascret  Timothy Ryan Duckett 《运动与健康科学(英文)》2021,10(1):73

BackgroundResearch on achievement goal orientations in sport has typically relied on the use of variable-centered approaches that tend to overlook population heterogeneity. In this study, we used a person-centered approach to identify subgroups of competitive tennis players according to unique combinations of achievement goal orientations and tested for subgroup differences in motivation and mental toughness.MethodsA sample of 323 competitive tennis athletes (69.35% male) between 15 and 25 years of age (17.60 ± 2.40 years, mean ± SD) completed the 3 × 2 Achievement Goal Questionnaire for Sport, Sport Motivation Scale II, and Mental Toughness Index. Latent profile analysis was used to identify unique combinations of achievement goal orientations. Comparisons between latent subgroups on autonomous motivation, controlled motivation, and mental toughness were performed using analysis of variance.ResultsLatent profile analysis supported 3 distinct patterns of achievement goal profiles that were primarily distinguishable based on valence of competence (i.e., approach vs. avoidance). Analyses of variance indicated that athletes who were classified into subgroups that endorsed approach types of goals (regardless of the types of avoidance goals they endorsed) reported higher levels of autonomous motivation and mental toughness.ConclusionResults indicated that athletes tend to pursue a number of achievement goals collectively rather than in isolation. Although approach goals are more commonly linked to adaptive psychological functioning and positive outcomes, avoidance goals may also be associated with desirable psychological characteristics if they are pursued in conjunction with approach types of achievement goals.  相似文献   

The carbon footprint of active sport participants     

《Sport Management Review》2019,22(4):513-526

Researchers examining carbon dioxide-equivalent emissions (carbon footprint) in sport have focused on sport events and, to a lesser extent, sport teams, but provided only average or aggregate values. The author takes the perspective of active sport participants and considers the heterogeneity of individual sport participation behavior. Using online surveys, adult active sport participants (n = 6537) in 20 different sports with main residence in Germany were asked to report their sport-travel behavior in 2015, including traveling in the context of regular (weekly) activity, sport competitions/tournaments, league games, day trips, and training camps/vacations. Annual carbon footprints were estimated using information about travel distances and transportation means. The results revealed an average annual carbon footprint of 844 kg of carbon dioxide-equivalent emissions, with individual sports producing more emissions than team/racket sports. Participants in nature sports had the highest emission levels. Regression analyses revealed that environmental consciousness significantly reduced carbon footprint in individual sports, but not in team/racket and nature sports, supporting the existence of an environmental value-action gap. Activity years, club membership, weekly exercise hours, performance level, and income were mainly positively associated with annual carbon footprint, while gender was insignificant. The findings have implications for policy makers and managers in sport associations and clubs.  相似文献   

Mind the gap: Capturing value from basic research through combining mobile inventors and partnerships     

Bruno Cassiman  Reinhilde Veugelers  Sam Arts 《Research Policy》2018,47(9):1811-1824

To successfully generate more valuable technologies from accessing basic research knowledge, firms need to combine institutional and individual level bridges to universities and research institutes active in basic research. This combination is particularly important when the new technology builds on scientific prior art. While mobile inventors are needed to transfer and translate basic knowledge into new technologies, partnerships provide the commitment, resources and incentive structure to integrate this basic research knowledge more effectively into the firm’s innovation process, thus improving the value capture from mobile inventors. Our findings in the micro-electronics field illustrate the importance of jointly accounting for firm and inventor level industry-science links to assess their effectiveness and provides evidence on complementarity from using both. Furthermore, identifying the scientific nature of the technology projects critically determines whether the combination of these links allow to capture more value.  相似文献   

Psychological support for sport coaches: an exploration of practitioner psychologist perspectives     

Sarah Kelly  Richard Thelwell  Jamie B. Barker  Chris G. Harwood 《Journal of sports sciences》2018,36(16):1852-1859

In the present study we add to the literature by exploring the degree to which UK practitioner psychologists perceive themselves able to support sport coaches, and how professional training prepares psychologists for coach work across performance domains. Ten participants comprising seven sport and exercise psychologists with Health Care Professions Council (HCPC) practitioner psychologist status and three trainee psychologists studying towards the British Psychological Society (BPS) qualification in sport and exercise psychology (QSEP) were individually interviewed. All participants reported prior experience of working with coaches across all performance domains. We explored: practitioner’s understanding of the challenges coaches face within their job; practitioner’s experiences of coach work; perspectives about the ways in which practitioners could and should support coaches; and, the degree to which professional training prepares practitioners for coach work. Using recommended procedures of Connelly and Peltzer, content analysis revealed practitioners perceived the challenges faced by coaches are different at grassroots level compared to those working with elite athletes, and that practitioners require skills to provide one-to-one coach support and group-based interventions. All practitioners perceived that training programmes do not adequately equip trainees with skills required for coach work. We discuss the implications for enhancing practitioner training in the UK.  相似文献   

A cyclic pursuit framework for networked mobile agents based on vector field approach     

Hamed Rezaee  Farzaneh Abdollahi 《Journal of The Franklin Institute》2019,356(2):1113-1130

This paper proposes a pursuit formation control scheme for a network of double-integrator mobile agents based on a vector field approach. In a leaderless architecture, each agent pursues another one via a cyclic topology to achieve a regular polygon formation. On the other hand, the agents are exposed to a rotational vector field such that they rotate around the vector field centroid, while they keep the regular polygon formation. The main problem of existing approaches in the literature for cyclic pursuit of double-integrator multiagent systems is that under those approaches, the swarm angular velocity and centroid are not controllable based on missions and agents capabilities. However, by employing the proposed vector field approach in this paper, while keeping a regular polygon formation, the swarm angular velocity and centroid can be determined arbitrary. The obtained results can be extended to achieve elliptical formations with cyclic pursuit as well. Simulation results for a team of eight mobile agents verify the accuracy of the proposed control scheme.  相似文献   

From Pleasure Rows and Plashing Sculls to Amateur Oarswomanship: The Evolution of Women’s Amateur Rowing in Britain     

Lisa Taylor 《国际体育史杂志》2018,35(14):1490-1506

Abstract

This paper considers the emergence of amateur women’s rowing between the late nineteenth and early twentieth centuries, in light of contemporaneous social norms relating to gender and sport. It does not seek to identify a foundational point for women’s rowing, nor does it offer a comprehensive survey of the development of the sport over this period. Instead, it considers women’s rowing in three key contexts: women’s university colleges, at the end of the nineteenth century; the first women-only rowing club on the Thames, established in 1896 by Dr Frederick Furnivall; and the formation of a governing body for the women’s sport in 1923. Analysis of the conditions within the sport in these environments, and their implications, leads to more nuanced consideration of the women’s sport, and of gender as a normative social construct more widely. Discussion focuses on gendered influences on sporting behaviour, manifested in institutional regulation and hegemonic authority, and the intersection of class and gender.  相似文献   

Sex,sport and money: voice,choice and distributive justice in England,Scotland and Wales     

Cathy Devine 《Sport, Education and Society》2018,23(9):824-839

The three British Sports Councils are instrumental in developing the policy landscape for sport and physical education (PE). They aspire to equality between the sexes in ‘sport and physical recreation’ (SPR), in keeping with their Royal Charters [Sport England. (1996/2009). Royal Charter of English Sports Council (Sport England). Retrieved from https://www.sportengland.org/media/10309/consolidated-royal-charter.pdf; Sport Scotland. (1996). The Royal Charter for the Scottish Sports Council. Retrieved from http://www.sportscotland.org.uk/sportscotland/Documents/Resources/sportscotlandRoyalCharter.pdf; Sport Wales. (1997). The Royal Charter of the Sports Council for Wales. Retrieved from http://sport.wales/media/128780/royal%20charter.doc] and the Equality Act [HM Government. (2010). Equality Act 2010. London: TSO. Retrieved from http://www.legislation.gov.uk/ukpga/2010/15/pdfs/ukpga_20100015_en.pdf]. As public bodies they are committed to eliminating direct and indirect discrimination in provision, and advancing equality. One of their main functions is the distribution of public money, and all collect participation data detailing the different SPR choices of the sexes. These are primary planning tools in the three home countries. This paper investigates whether equality in relation to sex is considered a ‘first-order’ question of distributive justice for the Councils. Therefore, the funding awarded to the top SPR preferences by sex for each Country is presented. Defining SPR determines eligibility for funding and the boundaries of the SPR infrastructure which influences and interfaces with sport, school sport and PE. Consequently, critical feminist political and economic theory is used to evaluate the Councils’ framing of SPR and equality in relation to sex. Male preferences are disproportionately grant-aided leaving those of females significantly under-funded. Although the remit of the Councils is ‘sport and physical recreation’ this is usually reframed by them as ‘sport’. Equality is generally considered a second-order question of justice, and outsourced to national governing bodies of sport. Further dance, one of the most popular female SPR activities for girls, has not, until 2016, been designated as SPR in England and has been ineligible for funding. These policies suggest indirect discrimination against women and girls who disproportionately prefer physical recreation and dance to competitive sport. Therefore, the Sports Councils and/or overarching government departments may not be fulfilling their legal requirements under the Equality Act.  相似文献   

Domesticated Animals on Exhibit at the Museum of Comparative Zoology, 1900–1928     

Jenna Tonn 《Endeavour》2019,43(1-2):32-36

In 1905 the Museum of Comparative Zoology at Harvard University began planning for a new domesticated animals exhibition in honor of the 100th anniversary of the birth of its founder Louis Agassiz. The resulting displays of variation and heredity in poultry, pigeons, rabbits, mice, and guinea pigs proved surprisingly popular to museumgoers. Some of these specimens still exist in the museum’s storage facilities, namely a series of poultry donated by the biologist Charles B. Davenport and an elaborate set of guinea pigs from the experimental evolutionist William E. Castle. Situating these domesticated animal displays within academic and popular cultures of poultry fancying, animal breeding, and evolutionary science reveals how a nineteenth-century museum known for its ties to anti-evolutionary principles attempted to modernize its public exhibits.  相似文献   

国内法院对奥运会组委会的管辖权边界──以15名女子跳台滑雪运动员诉温哥华冬奥会组委会为例          下载免费PDF全文

王进 《体育科研》2018,(4):21-26,33

在15名女子跳台滑雪运动员诉温哥华冬奥会组委会一案中，加拿大国内法院对于奥运会组委会的管辖权问题成为了争议的焦点。奥组委在形式上虽然是一个国内组织，但由于其与国际奥委会、各国际单项体育联合会以及国内政府之间的特殊关系，使得国内法院在决定是否对涉及奥组委的争议案件行使管辖权时，不得不谨慎地判断争议行为作出的真正主体。通常情况下，对于奥组委执行国际体育组织的奥林匹克决议产生的纠纷，国内法院应当遵守《奥林匹克宪章》的规定，放弃对此类争议的管辖权，交由具有合法资格的国际体育仲裁院（CAS）进行裁决。  相似文献   

Swimming and peak bone mineral density: A systematic review and meta-analysis     

Alejandro Gomez-Bruton  Jesús Montero-Marín  Alejandro González-Agüero  Alba Gómez-Cabello  Javier García-Campayo  Luis A. Moreno 《Journal of sports sciences》2018,36(4):365-377

This meta-analysis aims to determine the effects of regular swimming on bone mineral density (BMD) in young adults (18–30 years). A systematic search was performed in Pubmed, SPORTDiscus and the Cochrane Library from the earliest possible year to March 2016. Swimmers were compared to non-athletic controls (CG) and to high-impact athletes (HIGH). Effect sizes with the Hedges g in random effects models were developed. Fourteen studies met the inclusion criteria and were included in the meta-analyses. Swimmers presented similar BMD values to CG in whole-body (g = ?0.20; P = 0.251), femoral neck (g = ?0.05; P = 0.818) and lumbar spine (g = 0.18; P = 0.492); and lower BMD in the whole-body (g = ?1.21; P < 0.001), femoral neck (g = ?1.51; P < 0.001) and lumbar spine (g = ?0.84; P = 0.017) than the HIGH. For the whole-body differences, the higher the latitude the smaller the differences between swimmers and HIGH (B = 0.10; P = 0.001). For the femoral neck differences, age also seemed to reduce the differences between groups (B = 0.19; P = 0.020). Young adult swimmers present similar BMD values than CG and lower values than HIGH.  相似文献