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William J. Kraemer, Andrew C. Fry, Peter N. Frykman, Brian Conroy and Jay Hoffman

The use of resistance training for children has increased in popularity and interest. It appears that children are capable of voluntary strength gains. Exercise prescription in younger populations is critical and requires certain program variables to be altered from adult perspectives. Individualization is vital, as the rate of physiological maturation has an impact on the adaptations that occur. The major difference in programs for children is the use of lighter loads (i.e., > 6 RM loads). It appears that longer duration programs (i.e., 10-20 wks) are better for observing training adaptations. This may be due to the fact that it takes more exercise to stimulate adaptational mechanisms related to strength performance beyond that of normal growth rates. The risk of injury appears low during participation in a resistance training program, and this risk is minimized with proper supervision and instruction. Furthermore, with the incidence of injury in youth sports, participation in a resistance training program may provide a protective advantage in one’s preparation for sports participation.

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Bareket Falk, Sarah Braid, Michael Moore, Deborah O’Leary, Phil Sullivan and Panagiota Klentrou

The objective of this study was to assess bone strength using quantitative ultrasound (QUS, Sunlight Omnisense) in pre- and early-pubertal normal weight (NW, % body fat ≤20, n = 28), and overweight (OW, % body fat ≥25, n = 15) boys. Groups were similar in chronological and skeletal age, sexual maturity, sports participation, and calcium intake. Leisure-time physical activity was lower in OW boys. Radial speed of sound (SOS) was similar in the two groups. Tibial SOS, however, was significantly lower in OW compared with NW (3,554 ± 109 vs. 3,646 ± 71 m·s−1, respectively). Among pre- and early-pubertal boys, higher adiposity appears to be associated with lower bone SOS in the lower extremities.

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Daniel Gould

The mission of the Institute for the Study of Youth Sports (ISYS) is to provide leadership, scholarship, and outreach that “transforms” the face of youth sports in ways that maximize the beneficial physical, psychological, and social effects of participation for children and youth while minimizing detrimental effects. Since its inception in 1978, ISYS has partnered with numerous organizations to promote healthy youth sports participation. In this article, the general steps ISYS takes to form and facilitate partnerships are addressed. Four long-term partnerships are also described. The services provided to these organizations are described and the advantages and challenges of working with partners, in general, are delineated. How these partnerships are used to facilitate the teaching, outreach-engagement, and scholarship components of the Michigan State University land grant mission are also described. The case of ISYS shows that conducting community outreach and engagement projects greatly enhance the scholarly mission of the university.

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Meghan Schreck, Robert Althoff, Meike Bartels, Eco de Geus, Jeremy Sibold, Christine Giummo, David Rubin and James Hudziak

Few studies have explored the relation between withdrawn behavior (WB) and exercise and screen time. The current study used exploratory factor analysis to examine the factor structure of leisure-time exercise behavior (LTEB) and screentime sedentary behavior (STSB) in a clinical sample of youth. Structural equation modeling was employed to investigate the relations between WB and LTEB and STSB, conditional on gender. WB was assessed using the Child Behavior Checklist, and LTEB and STSB were measured using the Vermont Health Behavior Questionnaire. LTEB and STSB emerged as two separate factors. Gender moderated the structure of STSB only. For boys and girls, WB was inversely related to LTEB but not significantly related to STSB. LTEB and STSB are best represented as distinct, uncorrelated constructs. In addition, withdrawn youth may be at risk for poor health outcomes due to lower rates of LTEB. Mental health clinicians, sports psychologists, and related providers may be uniquely qualified to enhance motivation for sports participation in withdrawn youth.

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Thomas Rowland

The two articles in the area of cardiovascular physiology and disease in youth were chosen for commentary because of their exploration of new approaches to the diagnosis and management of cardiovascular derangements in young persons. The first, by Hinds et al., describes the potential clinical importance of detection of cardiovascular changes during exercise testing in adolescent athletes following concussions. This approach might prove useful in establishing safe return-to-play guidelines. The second, a review article by Van De Schoor et al, evaluates the frequency of myocardial scarring in athletes, some of adolescent age, which is a recognized risk factor for sudden cardiac death. These findings support other evidence indicating that sports participation per se might rarely increase the risk of such tragedies. Clearly more research is indicated by the information raised in both of these articles, but their importance to clinical medicine is obvious.

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Stacy Warner, Marlene A. Dixon and Christyn Schumann

Physical activity and sport developmental programs have demonstrated some success at providing valuable resources for young women as they navigate their teen years, yet these programs are not always intentional and/or accessible (Cadwallader, 2001; Petitpas, Cornelius, Van Raalte, & Jones, 2004; Tucker Center, 2007). One such program developed by the Women’s Sports Foundation is GoGirlGo. The curriculum, which combines sports participation with education, focuses on reducing and preventing unhealthy behaviors and on providing valuable connections and resources for girls. Using the theory of developmental intentionality, this qualitative investigation examined the efficacy of GoGirlGo in a five day long sport camp setting. This condensed delivery method is not addressed or recommended in the literature, yet the results of this investigation reveal that this delivery method is effective and could broaden the accessibility of the program.

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John A.W. Baker, Xiang-Jun Cao, David Wei Pan and Weili Lin

The effectiveness of the centralized sport system in China has been demonstrated by the achievements of athletes in international competition and the extent of mass sports participation; however, the efficiency of the system has been questioned. A government survey determined that administrators within the system came from diverse backgrounds with little or no training in sport, physical education, or management techniques. This situation is being remedied through workshops for existing administrators and 4-year degree programs for future administrators. This study provides information regarding the different perspectives of sport administration in China, the structure of the workshops and degree programs, and efforts being made to ensure that an already effective system becomes more efficient. All data were obtained from prime source materials and from surveys conducted by one of the authors.

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Renée M. Parker, Michael J. Lambert and Gary M. Burlingame

The present study was conducted to determine if female distance runners who report engaging in pathological food behaviors display the psychological characteristics of clinically diagnosed female eating-disordered patients. Comparisons were made among 29 eating-disturbed college runners, 31 normal college runners, 19 clinically diagnosed eating-disordered patients, and 34 nonathletic, non-eating-disordered college students. Measures included a 3-day diet journal, questionnaires collecting both personal information and information on eating behaviors and sports participation, the Eating Disorder Inventory (EDI), the Setting Conditions for Anorexia Nervosa Scale (SCANS), and the Minnesota Multiphasic Personality Inventory (MMPI). Without reaching eating-disordered clinical levels, the eating-disturbed runners appeared on psychological inventories as being more concerned with food and dieting than were the comparison runners and non-eating-disordered nonathletes. Only the eating-disordered group presented with significant levels of psychopathology. Implications for the athletic community are discussed.

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Clemens Drenowatz, Olivia Wartha, Jochen Klenk, Susanne Brandstetter, Martin Wabitsch and Jürgen Steinacker

This study examined the association between biological maturity, CVD risk, fitness and health behavior in 709 (359 male, 350 female) 8-year-old children (range: 6.3–8.9 years). Sports participation and sedentary behavior was assessed via parent questionnaire. Height and weight was measured and maturity status was predicted based on % of adult-height reached. Fitness was assessed via a test battery and CVD risk was determined using mean arterial pressure, cholesterol and intra-abdominal fat. BMIpercentiles (BMIPCT) differed significantly among early, average and late maturing children. Early maturing children displayed a higher CVD risk profile (0.5 vs. -0.2), lower fitness scores (-0.4 vs. 0.2), and spent more time watching TV (51 vs. 43 min/day) compared with their peers. After controlling for BMIPCT differences remained only for fitness in boys and TV time in girls.

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Martin Kristiansen, Ryna Levy-Milne, Susan Barr and Anne Flint

The purpose of this study was to assess reasons for and prevalence of supplement use among varsity athletes and nonvarsity athlete students (controls) at a Canadian university. A questionnaire, distributed to 247 varsity athletes and 204 controls, included variables regarding sports participation, supplements used, reasons for usage, perceived effects, and areas of interest about supplements. Response rates were 85.5% among varsity athletes and 44.6% among controls. Supplements were used by 98.6% of varsity athletes and 94.3% of controls. Varsity men most often reported using sports drinks, and used these (and carbohydrate gels, protein powder, and creatine) more than varsity women. Caffeine products were most often reported by other groups. Health professionals and the Internet were the most reported information sources, while friends most often recommended supplements. Many subjects indicated knowing little about supplements and wanting to learn more. Results indicate a need for nutrition education among both varsity athletes and university students.