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排序方式: 共有1558条查询结果,搜索用时 15 毫秒
1.
Kelly A. Mackintosh Nicola D. Ridgers Melitta A. McNarry 《Journal of sports sciences》2019,37(13):1506-1511
Physical activity (PA) is a key element in Cystic Fibrosis (CF) treatment strategies, yet little is known as to whether activity compensation occurs. This study examined whether PA and/or sedentary time on one day were temporally associated with time spent in these intensities the following day in youth with CF. Time spent sedentary and in different PA intensities were objectively-measured for seven consecutive days in 50 youth (22 boys; 12.0 ± 2.7 years); 25 with mild-to-moderate CF and 25 age- and sex-matched controls. Multilevel analyses (day and child) were conducted using generalised linear latent and mixed models. On any given day, every additional 10 minutes spent in sedentary time or moderate-to-vigorous physical activity (MVPA) were associated with 1.9 (95%CI: ?3.6 to ?1.2) and 12.4 (95%CI: ?22.1 to ?2.9) minutes less sedentary time the following day, respectively. These temporal associations were also observed when split by group (3.1 vs. 1.9 minutes for healthy and CF, respectively). These findings indicate that youth do not compensate their PA, irrespective of disease status, between days, but may compensate their sedentary time between days. Experimental studies are warranted to fully elucidate whether compensatory responses to PA and sedentary time occur, which is fundamental for informing PA promotion strategies. 相似文献
2.
Rebecca A. Battista Erin D Bouldin Karin A. Pfeiffer Christine E. Pacewicz Shannon R Siegel Eric M. Martin 《Measurement in physical education and exercise science》2021,25(1):43-52
ABSTRACT Participation in youth sport is positively associated with physical fitness and performance. The purpose of the current study was to examine if physical fitness measures during childhood and early adolescence predicted high school sport participation. Participants included youth in the Michigan State University Motor Performance Study. Measures consisted of the endurance shuttle run, Wells sit-and-reach, jump and reach, standing long jump, agility shuttle run and 30-yard dash. Individual, generalized estimating equation models were used to estimate the association between each measure and the odds of participating in high school sport. For both sexes, the endurance shuttle run and agility shuttle run were related to sport participation. For boys only, the long jump and 30-yard dash were also associated with sport participation. Better physical fitness and performance across several dimensions in childhood, including those related to motor skills, enhanced the likelihood of sport participation in high school. 相似文献
3.
Roman Farana Gerda Strutzenberger Timothy Exell Jiri Skypala Huw Wiltshire Gareth Irwin 《Journal of sports sciences》2019,37(13):1449-1456
The aim of the study was to determine if sex differences exist in the key elbow and wrist joint injury risk factors during different cartwheel (CW) and round-off (RO) techniques performed by young male and female artistic gymnasts. Sixteen active young gymnasts (8 males and 8 females) performed 30 successful trials of CW and RO with three different hand positions (parallel (10), T-shape (10) and reverse (10)). Synchronised kinematic and kinetic data were collected for each trial. Two-way repeated measures ANOVA (3 × 2, technique × sex) and effect-sizes (ES) were used for statistical analysis. In conclusion, female gymnasts exhibited greater normalised peak vertical ground reaction forces (VGRF), elbow and wrist compression forces and elbow internal adduction moments during CW and RO skills compared with male gymnasts. In both sexes, the parallel and reverse techniques increased peak VGRF, elbow and wrist compression forces and the elbow internal adduction moment. Increased elbow flexion resulted in decreased peak VGRF, elbow compression forces and elbow internal adduction moment. Injury risk factors including elbow extension and internal adduction moment with axial compression force suggest that a CW and RO in reverse and parallel techniques can be hazardous especially for young female gymnasts. 相似文献
4.
Since the mid-1980s, Australia has resettled thousands of African refugees. This paper focuses on the racialization of youth violence and the damage it sustains on refugee-background young Africans. The discussion proceeds in two interrelated stages. In the first stage, to understand the representation of African youth in the public sphere, the paper reviews the relevant literature, media headlines, and political commentaries. In so doing, it establishes that the continual framing of African youth as dangerous and violence-prone by conservative politicians and media outlets amounts to racial moral panic. In the second stage, guided by narrative research methodology, a small group of young Africans were invited to reflect on their everyday life under racialized frames. Accounts of the youth are presented under four themes: the presumption of guilt, emotional ill-being, opportunity hoarding, and the permanence of otherness. It is argued that, if left unaddressed, the racialization of youth violence can diminish the integration outcomes of African youth. 相似文献
5.
ABSTRACT
The aim of this study was to compare the effects of 20 min neuromuscular training with a programme of 10 min in youth football players. 342 (15.4 ± 1.7 years) male football players from 18 teams were included, and cluster-randomized by team into two intervention groups. Both groups performed an injury prevention programme twice a week over five months using the same exercises but a different duration. The first intervention group (INT10, n = 175) performed the programme for 10 min, the second intervention group (INT20, n = 167) for 20 min. Primary outcomes were lower extremity (LE) injuries. Secondary outcomes were injury type, severity, mechanism and compliance to the intervention. 13 teams with 185 players were included for final analysis. No significant group difference was found between INT10 (6.37 per 1000 h) and INT20 (7.20 per 1000 h) for the incidence rate ratio of the lower extremities (IRR = 1.03, 95% confidence interval 0.59, 1.79), nor for the distribution of injury location, type, severity or mechanism. The results show that performing preventive exercises for 10 min is no less effective than 20 min in youth football players. Shorter training sessions can, therefore, be effectively used for injury prevention. 相似文献
6.
José Roberto Andrade do Nascimento-Junior Leonardo de Sousa Fortes Gabriel Lucas Morais Freire Daniel Vicentini de Oliveira Lenamar Fiorese Lorcan Donal Cronin 《Measurement in physical education and exercise science》2020,24(1):11-24
ABSTRACTThis research adapted the Life Skills Scale for Sport (LSSS) into Portuguese and provided evidence for its construct validity. Study 1 included four translators and five academics who developed a Portuguese version of the LSSS (P-LSSS). During this study, evidence for the content and substantive aspects of construct validity was provided using an expert panel and 25 sports participants. Study 2 included 413 participants that completed the P-LSSS. Within this study, evidence for the structural aspect of construct validity was provided via factor analyses. Study 3 included 134 participants who completed the P-LSSS and a measure of motivation. This study provided evidence for the external aspect of construct validity, with results showing more self-determined motivation had positive relationships with participant’s life skills development. Overall, our findings provided evidence for the construct validity of P-LSSS scores. Researchers and practitioners can use the P-LSSS to assess life skills development within sports participants. 相似文献
7.
周进国 《吉林体育学院学报》2020,(1):1-6,20
本文的研究目的在于在社会企业与青少年体育俱乐部之间建立一种学术联系,基于社会企业的视角探寻我国青少年体育俱乐部能力建设的路径,为我国青少年体育俱乐部能力建设提供新视角。根据研究目的的需要,主要采用文献研究法及理论分析法。研究结论为:社会企业作为一种运用市场的理念和模式实现公益目标的创新型社会组织,能为我国青少年体育俱乐部能力建设提供启示。基于社会企业的视角,分别从内部治理能力、组织发展能力、外部拓展能力、公益开展能力等方面提出了我国青少年体育俱乐部能力建设的路径。内部治理能力建设,就是要建立现代化的管理制度;组织发展能力建设,就是要实施市场营销策略和培育社会资本;外部拓展能力建设,就是要强化信用意识和承担社会责任;公益开展能力建设,就是要提高体育发展能力和健康促进能力。 相似文献
8.
Tore Kristian Aune Arve Vorland Pedersen Rolf Petter Ingvaldsen Terje Dalen 《Scandinavian Journal of Educational Research》2017,61(3):369-375
The relative age effect (RAE) refers to that children born early in their year of birth show higher performance compared to children born late in the same cohort. The present study evaluated whether RAE exists within non-competitive physical education (PE) attainments, change in RAE magnitude with age, and possible gender differences. The results show a drop in PE attainment and a difference in number of high and low marks between the first and second half-year. Of the pupils who attained the highest mark, 73% were born in the first 6 months. In lower-secondary school, RAEs were larger in girls compared with boys. A possible explanation for the results is that the PE-teachers might be inspired by product-oriented criteria. 相似文献
9.
10.
Zhen Li 《International Journal of Lifelong Education》2017,36(6):662-678
Active citizenship is increasingly being framed in the context of lifelong and life-wide learning. However, research on young people’s participation in and experience of different forms of civic practice, particularly in informal settings in different sociocultural contexts, is scarce. Consequently, little is known about how these experiences shape their learning about active citizenship, their understanding of the self and their relationship to society. This paper reports findings from a small-scale qualitative research on students’ experiences of participation in extra-curricular activities (ECAs) in a UK Transnational Higher Education institution in China, in relation to the development of active citizenship and lifelong learning capacity. The findings suggest ECAs can provide opportunities for students to accumulate knowledge and develop skills, attitudes and values that underpin the promotion of active citizenship, while developing habits and skills essential for lifelong learning. 相似文献