Background: Studies have not examined the relationships between serum vitamin D (SVitD), serum cortisol (SCort), bone mineral density (BMD), and body fat percent (BF%) in elite figure skaters. However, studies of non-athletes have found that BMD is inversely related to SCort and directly related to SVitD, and BF% is inversely related to SVitD and directly related to SCort. It was, therefore, the purpose of this study to assess the relationships between SCort, SVitD, BMD, and BF% in elite figure skaters. Methods: U.S. national team figure skaters were assessed at a national training camp during the summer, 2012. BMD and body composition were measured by dual energy x-ray absorptiometry (DEXA). Blood chemistry values for SVitD and SCort were obtained via venous puncture after an overnight fast, the same morning as the DEXA measurement. Georgia State University Institutional Review Board approval was obtained for the assessment of data collected at this training camp. Results: 24 out of 39 training camp attendees (61.5%) volunteered to be assessed as part of this study. Subjects ranged from 17 to 34 years and included males (n=11) and females (n=12). In all skaters statistically significant negative correlations (2-tailed Spearman) were found between SCort and BMD of the spine (r=-0.458, p=0.032), pelvis (r=-0.532, p=0.011), ribs (r=-0.517, p=0.014), and trunk (r=-0.538, p=0.010). In females, SCort was negatively correlated with BMD of the pelvis (r=-0.664, p=0.026) and trunk (r=-0.609, p=0.047), and was positively correlated with total BF% (r=0.657, p=0.020) and trunk fat % (r=0.708, p=0.010). In males, SCort was significantly correlated with BMD of the ribs (r=-0.627, p=0.039). The 3 skaters (all female) with SCort > 28 mcg/dL had significantly lower mean BMD of the total body, left femoral neck, legs, trunk, and pelvis, and significantly greater BF% of the total body and trunk when compared to the 20 skaters with SCort 7-28 mcg/dL. No significant correlations between SVitD and BMD or BF% were found. A Mann-Whitney U test found no significant differences in BMD and BF% between the 8 skaters with SVitD ≥ 30 ng/mL compared to the 15 skaters with SVitD < 30 ng/mL (p>0.05). Females with SVitD ≥ 30 ng/mL had significantly higher BMD (p=0.041) of the right femoral neck when compared to those with lower SVitD. Conclusions: Correlations consistently found negative associations between SCort cortisol and BMD in multiple assessment areas, particularly those composed of trabecular bone. Higher SCort was also associated with higher BF% in female skaters. Despite spending a great deal of time in indoor facilities, limiting vitamin D creation through sunlight exposure, no significant correlation between SVitD and BMD was found. Female athletes in ‘appearance’ sports, may be predisposed to restrained eating behaviors, which may be associated with elevated SCort. These findings suggest a need for further study of the interaction between SCort, BMD, and BF% in these athletes. The lack of a statistically significant relationship between SVitD and BMD suggests the need to investigate additional factors associated with bone injury risk in athletes.

Syftet med denna studie var att undersöka unga idrottares upplevelser i en topprestation. Studiens frågeställningar var: ·        Vilka upplevelser har unga idrottare i en topprestation? ·        Upplever unga idrottare flow i en topprestation? ·        Vilka faktorer ligger bakom en topprestation hos unga idrottare?  Utifrån syfte och frågeställningar valdes mätinstrumentet Flow State Scale-2 (FSS-2). FSS-2 består av ett påståendeformulär som mäter den totala upplevelsen av flow samt var och en av de nio dimensionerna av flow. Kontakt togs via telefon och mail med ansvariga tränare vid idrottsgymnasier för att finna unga idrottare med ett tydligt minne av en topprestation. Undersökningsgruppen blev 51 stycken unga idrottare, män och kvinnor i åldrarna16-20 år som utövat fotboll, ishockey eller orientering på elitnivå. Litteratursökning gjordes i bibliotekskatalogen tillhörande Umeå Universitet. Den funna relevanta litteraturen och artiklarna har legat till grund för denna studies bakgrundsdel.  Påståendeformuläret FSS-2 visar att undersökningspersonerna, i sin topprestation, hade en stark upplevelse av inre tillfredsställelse, tydliga mål, koncentration på uppgiften, känsla av kontroll och balans mellan skicklighet och utmaning. Vidare upplevde de att handlingar och tankar kunde utföras automatiskt, tydlig återkoppling av resultatet i prestationen och avsaknad av osäkerhet. Undersökningsgruppen upplevde en viss förändrad tidsuppfattning i sin topprestation. Resultatet av studien visar att undersökningspersonerna upplevde en hög grad av flow i sina topprestationer. Bakomliggande faktorer till de unga idrottarnas topprestationer är kroppsliga dimensioner, fysiologiska faktorer, motoriska faktorer, psykologiska faktorer och sociologiska faktorer.  En slutsats av denna studie är att oavsett kön eller typ av idrott framkommer följande karaktäristiska faktorer när de upplevt en topprestation; trygg, säker, automatiserad, fokuserad och en känsla av kontroll. Dessa faktorer sammantaget tycks skapa en tydlig upplevelse av tillfredsställelse och glädje.

Thesis (M.S.)--University of Wisconsin -- La Crosse, 2000. / Includes bibliographical references (leaves 33-34).

Thesis (M.S.)--University of Wyoming, 2008. / Title from PDF title page (viewed on Dec. 4, 2009). Includes bibliographical references (p. 75-88).

Thesis (Ph. D.)--University of California, San Diego and San Diego State University, 2002. / Vita. Includes bibliographical references (leaves 266-274).

Thesis (M.A.)--Ball State University, 2009. / Title from PDF t.p. (viewed on Dec. 14, 2009). Includes bibliographical references (p. [30]-34).

Thesis (M.S.)--University of Wisconsin -- La Crosse, 2009. / Includes bibliographical references.

Thesis (M.S.)--Florida State University, 2004. / Advisor: Dr. David Pargman, Florida State University, College of Education, Dept. of Educational Psychology and Learning Systems. Title and description from dissertation home page (viewed June 29, 2004). Includes bibliographical references.

Thesis (M.S. in Leadership and Human Resource Development)--Naval Postgraduate School, June 2004. / Thesis advisor(s): Armando Estrada, William Bowman. Includes bibliographical references (p. 61-62). Also available online.

The Black experience throughout the history sport has engendered significant transformations to the landscape and culture of both sport and society. However, in the present sociocultural climate of intercollegiate athletics, the disproportion of Black male student athletes in the revenue generating high profile sports have a unique experience in sport unlike their athlete and non-athlete counterparts. The uniqueness of these student athletes’ experiences exists in the ways in which they figure to negotiate their Blackness and their roles as an athlete and student contextualized within the current racial climate of sport culture. There remains a gap in existing literature and research of the conditions and lived experiences of Black student athletes concerning the developmental process of racial identity and its relationship with their athletic identities and academic self-concepts. The present research addresses this gap of knowledge about these stakeholders (i.e. the Black male student athlete) in sport by conducting a mix-methods study exploring the issues of identities, academic self-concept, and developing a deeper understanding based on the experiential knowledge of participants. The relationships between racial and athletic identity and academic self-concept were examined with a participant sample of Black male college football players at Division 1-A universities (N=255). Additionally, a qualitative instrumental case study grounded by Critical Race Theory explored the experiences and perceptions of eleven Black male student athletes participating in high profile athletic programs at predominately White institutions. The research findings indicate at least partial evidence of a relationship between pre-encounter assimilationist and miseducation attitudes with academic self-concept mediated by an elevated athletic identity of participants. There were five themes that emerged from the empirical materials. The themes are presented as: Lane Assignments, Allegiance to the Game versus Classroom, Race Matters??, Conformity, and Still at Work. This research illustrates that the identity, academic self-concepts and experiences of the Black male student athlete in college sport is vastly impacted by complex sociocultural systems. Findings suggest intercollegiate athletic support staff should purposefully accommodate the needs and experiences of student athletes with culturally relevant systems of practice to enhance student athlete development. / text