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Daniel P. Bailey Sarah J. Charman Thomas Ploetz Louise A. Savory Catherine J. Kerr 《Journal of sports sciences》2017,35(22):2164-2171
This study examines the association between prolonged sedentary time and breaks in sedentary time with cardiometabolic risk in 10–14-year-old children. This cross-sectional design study analysed accelerometry-determined sedentary behaviour and physical activity collected over 7 days from 111 (66 girls) UK schoolchildren. Objective outcome measures included waist circumference, fasting lipids, fasting glucose, blood pressure, and cardiorespiratory fitness. Logistic regression was used for the main data analysis. After adjustment for confounders, the odds of having hypertriglyceridaemia (P = 0.03) and an increased clustered cardiometabolic risk score (P = 0.05) were significantly higher in children who engaged in more prolonged sedentary bouts per day. The number of breaks in sedentary time per day was not associated with any cardiometabolic risk factor, but longer mean duration of daily breaks in sedentary time were associated with a lower odds of having abdominal adiposity (P = 0.04) and elevated diastolic blood pressure (P = 0.01). These associations may be mediated by engagement in light activity. This study provides evidence that avoiding periods of prolonged uninterrupted sedentary time may be important for reducing cardiometabolic disease risk in children. 相似文献
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Hosni Hasan Keith Davids Jia Yi Chow Graham Kerr 《European Journal of Sport Science》2017,17(3):294-302
This study investigated effects of wearing compression garments and textured insoles on modes of movement organisation emerging during performance of lower limb interceptive actions in association football. Participants were six skilled (age?=?15.67?±?0.74 years) and six less-skilled (age?=?15.17?±?1.1 years) football players. All participants performed 20 instep kicks with maximum velocity in four randomly organised insoles and socks conditions, (a) Smooth Socks with Smooth Insoles (SSSI); (b) Smooth Socks with Textured Insoles (SSTI); (c) Compression Socks with Smooth Insoles (CSSI); and (d), Compression Socks with Textured Insoles (CSTI). Results showed that, when wearing textured and compression materials (CSSI condition), less-skilled participants displayed significantly greater hip extension and flexion towards the ball contact phase, indicating larger ranges of motion in the kicking limb than in other conditions. Less-skilled participants also demonstrated greater variability in knee–ankle intralimb (angle–angle plots) coordination modes in the CSTI condition. Findings suggested that use of textured and compression materials increased attunement to somatosensory information from lower limb movement, to regulate performance of dynamic interceptive actions like kicking, especially in less-skilled individuals. 相似文献
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Kirstin Hallmann Cristina Muñiz Artime Christoph Breuer Sören Dallmeyer Magnus Metz 《Journal of Cultural Economics》2017,41(4):467-487
Participation in sport and participation in cultural activities are usually studied separately. However, since both activities dominate the leisure time of most individuals, it is reasonable to analyse simultaneously the determinants of participation in both activities. Informed by the economic household theory, this study examined the core factors of time, income, human capital as well as several socio-demographic factors. The results showed that there was as small but significant correlation between sports and cultural participation. Thus, both can be described as complementary and competing activities. Leisure time, gender, education, nationality and subjective well-being were significant predictors of both sports and cultural participation. Differences were found for the variables age and income. This paper also describes the characteristics of those individuals who are not likely to participate in either activity and emphasises the importance of social inclusion programmes. 相似文献
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Four studies with 180 5–7 year olds, 165 8–11 year olds and 199 adults show that young children appreciate the distinctive role played by mechanistic explanations in tracking causal patterns. Young children attributed greater knowledge to individuals offering mechanistic reasons for a claim than others who provide equally detailed nonmechanistic reasons. In Study 1, 5–7 year olds attributed greater knowledge to those offering mechanistic reasons. In Studies 2 and 3, all ages (5–7 and adults for Study 2; 5–7, 8–11 and adults for Study 3) assigned greater knowledge to those offering mechanistic reasons about causally central features than those offering nonmechanistic reasons. In Study 4, all ages (5–7, 8–11, adults) modulated the epistemic bias as a function of embedding goals. 相似文献
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The 2004 Olympic Games saw a range of judging scandals in the sport of artistic gymnastics that prompted the International Gymnastics Federation to make changes to the sport's judging system. Therefore, following these games, the International Gymnastics Federation reworked the gymnastics scoring system, where the most prominent change was the removal of the ‘perfect 10’ as the highest score possible, to be replaced by an open-ended scoring system. The goal of this paper is to examine the effectiveness of the open-ended system that was introduced in 2006 through examining some of the sport's key values – an approach loosely aligned with broad internalism. It is suggested that the dual purposes of analysing what is achieved and the manner of achieving it are key values of the sport and are differentiated through the way judging utilises two categories known, in gymnastics, as ‘difficulty’ and ‘artistry’. This paper argues that the method of judging ‘difficulty’ is an improvement on previous judging methods. Our analysis of the definition and judging of ‘artistry’ in artistic gymnastics, however, reveals a less certain result. 相似文献