Can sit-to-stand muscle power explain the ability to perform functional tasks in adults with severe obesity?     

Samuel T. Orange  Phil Marshall  Leigh A. Madden  Rebecca V. Vince 《Journal of sports sciences》2019,37(11):1227-1234

This study examined the relationship between sit-to-stand (STS) power and physical function in adults with severe obesity. Thirty-eight adults (age: 44 ± 12 years; body mass index [BMI]: 45.2 ± 7.8 kg/m²) completed evaluations of STS power, strength and functional performance. STS power was measured with a wearable inertial sensor, strength was assessed with the isometric mid-thigh pull, and function was measured with the timed up-and-go (TUG), six-minute walk test (6MWT) and 30-s chair STS. Power and strength (normalised to body mass) entered regression models in addition to age, gender, BMI and physical activity (daily step count). Power displayed large univariate associations with TUG (r = 0.50) and 30-s chair STS (r = 0.67), and a moderate association with 6MWT (r = 0.49). Forward stepwise regression revealed that power independently contributed to TUG (β = ?0.40, p = 0.010), 30-s chair STS (β = 0.67, p < 0.001) and 6MWT performance (β = 0.27, p = 0.007). Power also appeared to be a superior determinant of function compared with strength. Power generated via the STS transfer largely underpins the ability to perform functional tasks in adults with severe obesity, although intervention studies are required to investigate a potentially causal relationship.  相似文献   

Editorial     

Penelope L. Lisi  Patricia Marshall  Özlem Sensoy 《Multicultural Perspectives》2015,17(3)

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Editorial     

Penelope L. Lisi  Patricia Marshall  Özlem Sensoy 《Multicultural Perspectives》2014,16(4)

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A research note: further evidence of sports records in the middle ages     

John Marshall Carter 《国际体育史杂志》2013,30(3):417-419

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Policy discourse analysis: negotiating gender equity     

Catherine Marshall 《教育政策杂志》2013,28(2):125-156

This analysis of activists' and bureaucrats' politicking for gender policy in Australia demonstrates the utility of discourse analysis. Feminist policy initiatives are special: they challenge hegemony and they circulate counter discourse. Policy elites try to manage and discredit them. Traditional policy frameworks are used to identify policy with policy mechanisms, policy communities, value shifts and the like. But the use of policy discourse analysis for this Australian story elicits key strategies for constructing and managing a counter narrative and maintaining a counter public of outsiders using insiders to institutionalize gender policies even as equity and social justice value priorities recede.  相似文献   

重构中的图书馆软件产业     

王启云  俞传正  刘炜 《图书馆杂志》2007,26(9):56-60

2005年图书馆软件行业的重新洗牌,昭示了如今的风云变幻、吐故纳新乃至沧桑巨变。2006年图书馆集成管理系统(ILS)产业稳步发展,总收入从2005年的大约5.35亿美元提高到了2006年的5.7亿美元。一些公司ILS核心产品的收入在减少,而基于Web界面和电子内容管理的新产品收入在增加。无  相似文献   

Carol G. Jenkins, Medical Library Association President 2001-2002     

Marshall JG 《Bulletin of the Medical Library Association》2001,89(3):311-314

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Lunge performance and its determinants     

Cronin J  McNair PJ  Marshall RN 《Journal of sports sciences》2003,21(1):49-57

For activities such as squash, badminton and fencing, the ability to quickly complete a lunge and return to the start or move off in another direction is critical for success. Determining which strength qualities are important predictors of lunge performance was the focus of this study. Thirty-one male athletes performed: (1) a unilateral maximal squat (one-repetition maximum, 1-RM) and unilateral jump squat (50% 1-RM) on an instrumented supine squat machine, and (2) a forward lunge while attached to a linear transducer. We performed stepwise multiple regression analysis with lunge performance as the dependent variable and various strength, flexibility and anthropometric measures as the independent variables. From the many strength and power measures calculated, time to peak force was the best single predictor of lunge performance, which accounted for 55% of the explained variance. The best three-variable model for predicting lunge performance accounted for 76-85% of the explained variance. The models differed, however, according to whether lunge performance was expressed relative to body mass (time to peak force, mean power and relative strength = 76%) or taken as an absolute value (time to peak force, leg length and flexibility = 85%). We conclude that one to two trials were reliable for strength diagnosis and that one strength measure cannot accurately explain functional performance because other factors, such as body mass, flexibility and leg length, have diverse effects on the statistical models.  相似文献   

Student activity levels, lesson context, and teacher behavior during middle school physical education     

McKenzie TL  Marshall SJ  Sallis JF  Conway TL 《Research quarterly for exercise and sport》2000,71(3):249-259

There is little research on students' engagement in physical activity in middle school physical education (PE). We observed student activity, lesson context, and teacher behavior in 430 PE lessons taught by 126 teachers in 24 schools. Variables were analyzed by mixed-model nested analyses of covariance. Boys were more active than girls overall and during skill drills, game play, and free play. Student activity varied by lesson context, with fitness activities producing the most activity. Class size was negatively associated with student activity. Daily PE contributed a weekly total of 25 min of vigorous activity and 83 min of moderate-to-vigorous activity--much less than national objectives. Results suggest that numerous opportunities exist for increasing student physical activity during middle school PE.  相似文献   

“Back to Basics: Back to Boredom?”     

John Marshall Carter 《Clearing house (Menasha, Wis.)》2013,86(3)

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