| 1. |
- Allentoft, Morten E., et al.
(författare)
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100 ancient genomes show repeated population turnovers in Neolithic Denmark
- 2024
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Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 625, s. 329-337
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Tidskriftsartikel (refereegranskat)abstract
- Major migration events in Holocene Eurasia have been characterized genetically at broad regional scales1–4. However, insights into the population dynamics in the contact zones are hampered by a lack of ancient genomic data sampled at high spatiotemporal resolution5–7. Here, to address this, we analysed shotgun-sequenced genomes from 100 skeletons spanning 7,300 years of the Mesolithic period, Neolithic period and Early Bronze Age in Denmark and integrated these with proxies for diet (13C and 15N content), mobility (87Sr/86Sr ratio) and vegetation cover (pollen). We observe that Danish Mesolithic individuals of the Maglemose, Kongemose and Ertebølle cultures form a distinct genetic cluster related to other Western European hunter-gatherers. Despite shifts in material culture they displayed genetic homogeneity from around 10,500 to 5,900 calibrated years before present, when Neolithic farmers with Anatolian-derived ancestry arrived. Although the Neolithic transition was delayed by more than a millennium relative to Central Europe, it was very abrupt and resulted in a population turnover with limited genetic contribution from local hunter-gatherers. The succeeding Neolithic population, associated with the Funnel Beaker culture, persisted for only about 1,000 years before immigrants with eastern Steppe-derived ancestry arrived. This second and equally rapid population replacement gave rise to the Single Grave culture with an ancestry profile more similar to present-day Danes. In our multiproxy dataset, these major demographic events are manifested as parallel shifts in genotype, phenotype, diet and land use.
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| 2. |
- Allentoft, Morten E., et al.
(författare)
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Population genomics of post-glacial western Eurasia
- 2024
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Ingår i: Nature. - 0028-0836 .- 1476-4687. ; 625:7994, s. 301-311
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Tidskriftsartikel (refereegranskat)abstract
- Western Eurasia witnessed several large-scale human migrations during the Holocene1–5. Here, to investigate the cross-continental effects of these migrations, we shotgun-sequenced 317 genomes—mainly from the Mesolithic and Neolithic periods—from across northern and western Eurasia. These were imputed alongside published data to obtain diploid genotypes from more than 1,600 ancient humans. Our analyses revealed a ‘great divide’ genomic boundary extending from the Black Sea to the Baltic. Mesolithic hunter-gatherers were highly genetically differentiated east and west of this zone, and the effect of the neolithization was equally disparate. Large-scale ancestry shifts occurred in the west as farming was introduced, including near-total replacement of hunter-gatherers in many areas, whereas no substantial ancestry shifts happened east of the zone during the same period. Similarly, relatedness decreased in the west from the Neolithic transition onwards, whereas, east of the Urals, relatedness remained high until around 4,000 bp, consistent with the persistence of localized groups of hunter-gatherers. The boundary dissolved when Yamnaya-related ancestry spread across western Eurasia around 5,000 bp, resulting in a second major turnover that reached most parts of Europe within a 1,000-year span. The genetic origin and fate of the Yamnaya have remained elusive, but we show that hunter-gatherers from the Middle Don region contributed ancestry to them. Yamnaya groups later admixed with individuals associated with the Globular Amphora culture before expanding into Europe. Similar turnovers occurred in western Siberia, where we report new genomic data from a ‘Neolithic steppe’ cline spanning the Siberian forest steppe to Lake Baikal. These prehistoric migrations had profound and lasting effects on the genetic diversity of Eurasian populations.
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| 3. |
- Book Jr., Robert T., et al.
(författare)
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Oatmeal is better than no meal : the career pathways of ten professional athletes from underserved communities in the United States
- 2021
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Ingår i: International Journal of Sport and Exercise Psychology. - New York : Taylor & Francis. - 1612-197X .- 1557-251X. ; 19:4, s. 504-523
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Tidskriftsartikel (refereegranskat)abstract
- The objective of this study was to explore career pathways to athletic success in American professional athletes with low socioeconomic background. Ten African American professional male athletes, who met the criteria of playing at least one year in a professional league and spending their formative years in an American underserved community, participated in the study. Interviews inspired by the cultural praxis of athletes’ careers, lasted 68-137 minutes, and the transcripts were thematically analysed. Four career stages (childhood years, middle/high school years, college years, professional years) and three themes (context, challenges, coping) were visible in the career pathways of the participants. During the first stage the athletes’ athletic foundation was developed by participating in inexpensive, easy to access sports in unstructured sporting environments, while simultaneously relying upon the strength of a mother to keep them safe. An increased susceptibility to the dangers of environmental factors (e.g., drugs, gangs) during the middle/high school years made this period of time the most precarious for the athletes, but was also the most crucial for their athletic development. The college years were a time of “catching up,” whereby the athletes entered a whole new environment for which they were physically (e.g., underweight) and psycho-socially (e.g., racial integration) unprepared, but their hard work and the help of peers and coaches propelled them to success (i.e., professional contract). Finally, the results indicate that coping resources the athletes developed dealing with hardship were perceived as key factors enabling them to endure the difficulties of a professional career. © 2020 International Society of Sport Psychology.
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| 4. |
- Book Jr, Robert T., et al.
(författare)
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Sink or swim : career narratives of two African American athletes from underserved communities in the United States
- 2021
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Ingår i: Qualitative Research in Sport, Exercise and Health. - Abingdon : Routledge. - 2159-676X .- 2159-6778. ; 13:6, s. 904-919
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Tidskriftsartikel (refereegranskat)abstract
- The objective of this study was to explore the career narratives of professional athletes from underserved communities in the United States. Two African American athletes (named Marcus and Imari for the study), who both met the criteria of playing at least one year in a professional league and spending their formative years in an underserved community, participated in this study. Life story interviews lasting about two hours were explored through the principles of narrative analysis, focusing on both content and structure. Each participant constructed a sink or swim narrative typology termed risk, descent, and gain that focused more on the environmental context in an underserved community than their athletic development, which opposes the performance narrative often depicted by professional athletes. Although the contextualised nature of risk manifested differently for Marcus and Imari, their life courses both reflected low points precipitated by risky decisions or circumstances followed by gainful moments ultimately culminating in professional contracts. The analysis also uncovered the realities and challenges associated with having the intersecting identity of being a poor, Black aspiring athlete in a racially charged atmosphere. Finally, the athletes’ perceptions of how their challenging formative development influenced their professional career pathway as well as the ramifications of sink or swim narratives in popular American culture are considered. © 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.
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| 5. |
- Book, Robert T., et al.
(författare)
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“All they have seen is a model for failure:” Stakeholder’s perspectives on athletic talent development in American underserved communities
- 2022
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Ingår i: Journal of Applied Sport Psychology. - Philadelphia : Routledge. - 1041-3200 .- 1533-1571. ; 34:6, s. 1037-1057
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Tidskriftsartikel (refereegranskat)abstract
- This study explores the primary challenges faced and strategies implemented in underserved athletic talent development environments (UATDEs) in the United States and examines how developing within such environments impacts athletes once they reach the college and professional levels of sports. Thirteen stakeholders (M = 10, F = 3), who had significant experience working with professional and youth athletes from underserved communities, participated in the study. Unstructured interviews lasting slightly over an hour (M = 74 min) were analyzed using the principles of reflexive thematic analysis and the process uncovered two categories: shared features of school-based UATDEs in the United States and the ripple effects of trauma which were used to structure the findings. Within these two categories, primary themes were presented relating to the challenges observed and strategies implemented to overcome these obstacles in UATDEs as well as how developing within a UATDE can influence an athlete upon leaving the environment. The study found that stakeholders (i.e., administrators, coaches, etc.) who work within UATDEs must be aware of the inherent challenges that the environment creates and how to best support the athletes who require increased psychosocial developmental attention. Further, the same stakeholders also need to be supported in their work. Finally, when athletes from UATDEs leave the environment, stress-inducing traumatic events of their formative years may stay with them requiring that stakeholders at the university and professional levels provide support to those that need it as talent can suffer from trauma. Lay summary: This study explored the perceptions of stakeholders who work with athletes in or coming from American underserved communities. The consensus is that significant challenges exist for coaches working in such environments and athletes developing in these circumstances will likely carry emotional trauma with them during their life and athletic careers.Implications for practice Applied practitioners working in UATDEs must prioritize the psychosocial development of their athletes as much, if not more, than athletic development. Organizations, such as AASP and ISSP must educate (e.g., through conferences, seminars, webinars, etc.) stakeholders and coaches working in UATDEs of the potential challenges faced and resources required to excel in such environments. Applied practitioners in university and professional sport must understand that athletes coming from UATDEs will need additional and specialized support focused upon, for example, the transition to a new environment or managing the ripple effects of trauma. © 2021 Association for Applied Sport Psychology.
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| 6. |
- Book, Robert T., et al.
(författare)
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Professional migration from the United States to Europe : Composite vignettes of black male basketball players from underserved communities
- 2021
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Ingår i: Psychology of Sport And Exercise. - : Elsevier. - 1469-0292 .- 1878-5476. ; 54
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To explore how the intersectional perspective of being a Black male from an underserved community shaped the professional cultural transition of American basketball players to Europe. Design: and Method: The seven Black male athletes, who met the criteria of playing at least one year in a professional European basketball league and spending their formative years in an underserved community in the USA, participated in this study. Life story interviews, lasting between one and 2 h, were analysed through the principles of narrative analysis. Creative non-fiction was used to represent the findings in the form of composite vignettes using the words of the participants to create an evocative and meaningful experiential reconstruction. Findings: The analysis uncovered three primary themes; steppingstones to becoming a professional basketball migrant; from America to Europe: a whole new world once again; and “don't bother to unpack your bags:” from ups and downs to settlement plans. Within these themes, the intersectional identity of being a Black male from a poor community underpinned the storyline. Conclusions: All seven participants left their underserved community at some point during their teenage years, and this transition into a more affluent, White dominated society proved beneficial for the move to Europe. Further, the shared intersectional identity of being an African American male from a low socioeconomic community had critical implications for how they experienced the cultural transition to Europe, and how they were received by the host environment. © 2021 Elsevier Ltd
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| 7. |
- Book, Robert T., et al.
(författare)
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“We are their last chance” : A case study of a college basketball environment in an American underserved community
- 2024
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Ingår i: Journal of Applied Sport Psychology. - Philadelphia, PA : Routledge. - 1041-3200 .- 1533-1571. ; 36:1, s. 1-23
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Tidskriftsartikel (refereegranskat)abstract
- In this case study we used the holistic ecological approach (HEA) to examine an underserved athletic talent development environment (UATDE) in the United States to: (1) holistically describe a successful UATDE—in this case a community college basketball program known as Best Community College, and (2) explore factors contributing to the success of developing athletes that repeatedly earn athletic scholarships. Data were collected via in-situ observations, document analysis, and interviews (both formal and informal) with coaches, players, and other key stakeholders. The findings were summarized in two empirical models: (1) the UATDE empirical model of Best Community College, and (2) the underserved environment success factors (UESF) empirical model of Best Community College. The operation of the UATDE was significantly influenced by the underserved community in which it was embedded, translating to a lack of financial and human resources, while the team’s roster was occupied by athletically talented, but psychosocially vulnerable players. These challenges were overcome, in part, by a dedicated support team as well as the cultural paradigm established by the head coach as a cultural leader. Conclusively, this case study constitutes an important supplementation to the evolving body of literature utilizing the HEA, highlighting how an environmental context can shift the focus of athletic talent development when we consider the concept of a UATDE. Lay summary: This case study explored a successful community college basketball program located within an underserved American community. While the investigation concludes that socioeconomic challenges in the surrounding community created significant barriers to success, the head coach and support team were able to help players succeed in sport and life.IMPLICATIONS FOR PRACTICE Those working in community colleges must be made aware of issues stemming from where the environment is located and also related to the backgrounds of the prospective athletes. Community college sports programs are an important steppingstone to life and sport success for the athletes they serve but a lack of human and financial resources are a large barrier to success that can be counteracted by strong cultural leaders within the sport program. UATDEs must be considered a unique context and practitioners should let this context inform their practice, for example, by supporting the staff as much as the athletes, supporting the head coach in developing a functional cultural paradigm, and supporting the athletes’ broader psychosocial development and not only their performance. © 2023 Association for Applied Sport Psychology.
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| 8. |
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| 9. |
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| 10. |
- Henriksen, Kristoffer, et al.
(författare)
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A holistic ecological approach to sport and study : The case of an athlete friendly university in Denmark
- 2020
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Ingår i: Psychology of Sport And Exercise. - Amsterdam : Elsevier. - 1469-0292 .- 1878-5476. ; 47
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: Dual career development environments (DCDEs) exist to support student-athletes in their endeavours to combine sport with education or work. Such environments are likely to vary in their structure, processes, philosophy, and degree of efficiency. With the overall aim of applying the holistic ecological approach (Henriksen, Stambulova & Roessler, 2010) to the study of DCDEs, the objectives of the present study are: (a) to provide a holistic description of a Danish athlete-friendly university as a DCDE, and (b) to investigate the factors influencing the environment’s effectiveness. Methodology: Based on two working models, the study takes a case study approach and a real-time perspective and uses multiple sources of data (interviews, observations, and documents). Results: Two empirical models summarize the findings and portray the DCDE as: (1) centred on a dual career (DC) support team that serves to support communication and coordination between the sport, study, and private domains; (2) focused on providing individual solutions for each athlete; (3) teaching student-athletes to plan, prioritize, communicate, and take responsibility for the balance in their DC endeavour; and (4) deeply rooted in a shared DC philosophy that puts sport first and recognizes that the student-athletes must be seen as whole persons. Conclusion: Researcher-practitioners in the DC context are encouraged to focus not only on the challenges and coping strategies of the individual student-athletes but to understand and (if necessary) optimize the entire environment around them. © 2019 Elsevier Ltd. All rights reserved.
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