Relationship between abdominal adiposity,cardiovascular fitness,and biomarkers of cardiovascular risk in British adolescents     

Moira S. Lewitt  Julien S. Baker 《运动与健康科学(英文)》2020,9(6):634-644

BackgroundPuberty is a critical time in the development of overweight and obesity. The aim of this study was to examine relationships between measures of adiposity, cardiovascular fitness, and biomarkers of cardiovascular disease risk in adolescents.MethodsIn a cross-sectional study design, 129 girls and 95 boys aged 12.9–14.4 years at various stages of puberty were included, along with their mothers (n = 217) and fathers (n = 207). Anthropometric assessments of adiposity were made, along with cardiovascular physical fitness, using the 20-m shuttle run test, and biomarkers associated with cardiovascular risk, including glucose, insulin, triglyceride, fibrinogen, and C-reactive protein (CRP) concentrations.ResultsWaist-to-height ratio values were similar in boys and girls and correlated positively with diastolic blood pressure, insulin, triglyceride, fibrinogen, and CRP concentrations, and inversely with cardiovascular fitness scores. Skinfold thickness measurements were higher in girls. High-molecular-weight adiponectin concentrations were lower in boys than girls, particularly in late puberty, and CRP levels were higher. Cardiovascular fitness, maternal body mass index (BMI), and paternal BMI contributed independently to the variance in waist measurements in girls and boys. Gender, triceps skinfold thickness, and weight-to-height ratio, but not parental BMI, contributed independently to the variance in cardiovascular fitness.ConclusionThere is a relationship between measures of adolescent adiposity and parental weight that involves factors other than cardiovascular fitness. Adolescent boys have relatively more abdominal fat than girls and a tendency to have a proinflammatory profile of biomarkers. These observations suggest that family and social environmental interventions are best undertaken earlier in childhood, particularly among boys.  相似文献   

Instruction Via Web-Based Modules in Early Childhood Personnel Preparation: A Mixed-Methods Study of Effectiveness and Learner Perspectives     

Heidi L. Hollingsworth  Chih-Ing Lim 《Early Childhood Education Journal》2015,43(2):77-88

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Creating teacher capacity in Early Childhood Education and Care institutions implementing an authoritative adult style     

Heidi Omdal 《Journal of Educational Change》2018,19(1):103-129

The being together intervention intends to raise teacher capacity in Norwegian Early Childhood Education and Care (ECEC) institutions and promote social and emotional development in preschoolers by implementing an authoritative (warm and predictable) adult style in the institution. An authoritative adult balances between building up high quality interactions with children, while at the same time having a predictable structure with clear norms and social expectations in the learning environment. The purpose of this study was to investigate what helped the ECEC institutions to successfully implement the program principles and core components, and what were the challenges. The staff groups of seven Norwegian ECEC institutions in different municipalities who took part in the innovation were interviewed at the beginning and before the end of the first year of implementation. Data analysis identified five success criteria in the implementation process; strong commitment to the authoritative adult style, strong focus on the implementation process, advanced support systems, highly involved leaders, and a collective orientation. These elements resulted in a shared vision and an academically grounded practice in the ECEC institutions. Staff members without formal professional training and a lack of written documentation in the ECEC institutions should be given more consideration in further improvement of the capacity building.  相似文献   

Fatigue increases ankle sprain risk in badminton players: A biomechanical study     

Alexis Herbaut  Julien Delannoy 《Journal of sports sciences》2020,38(13):1560-1565

ABSTRACT

Ankle sprains are the most common injury in regular badminton players and usually occur at the end of a match or training. The purpose of the present study was to examine the influence of fatigue produced by badminton practice on the lower limb biomechanics of badminton players. It was hypothesized that fatigue induces ankle kinematic and lower leg muscle activity changes which may increase the risk of ankle sprain. Ankle kinematics, ankle kinetics and muscles activities of 17 regular badminton players were recorded during lateral jumps before and after an intense badminton practice session. Post-fatigue, ankle inversion at foot strike and peak ankle inversion increased (+2.6°, p = 0.003 and +2.5°, p = 0.005, respectively). EMG pre-activation within 100 ms before foot landing significantly decreased after fatigue for soleus (?23.4%, p = 0.031), gastrocnemius lateralis (?12.2%, p = 0.035), gastrocnemius medialis (?23.3%, p = 0.047) and peroneus brevis (?17.4%, p = 0.036). These results demonstrate impaired biomechanics of badminton players when fatigue increases, which may cause a greater risk of experiencing an ankle sprain injury.  相似文献   

Bandpass sorting of heterogeneous cells using a single surface acoustic wave transducer pair     

Gergely Simon  Caroline Busch  Marco A. B. Andrade  Julien Reboud  Jonathan M. Cooper  Marc P. Y. Desmulliez  Mathis O. Riehle  Anne L. Bernassau 《Biomicrofluidics》2021,15(1)

Separation and sorting of biological entities (viruses, bacteria, and cells) is a critical step in any microfluidic lab-on-a-chip device. Acoustofluidics platforms have demonstrated their ability to use physical characteristics of cells to perform label-free separation. Bandpass-type sorting methods of medium-sized entities from a mixture have been presented using acoustic techniques; however, they require multiple transducers, lack support for various target populations, can be sensitive to flow variations, or have not been verified for continuous flow sorting of biological cells. To our knowledge, this paper presents the first acoustic bandpass method that overcomes all these limitations and presents an inherently reconfigurable technique with a single transducer pair for stable continuous flow sorting of blood cells. The sorting method is first demonstrated for polystyrene particles of sizes 6, 10, and 14.5 μm in diameter with measured purity and efficiency coefficients above 75 ± 6% and 85 ± 9%, respectively. The sorting strategy was further validated in the separation of red blood cells from white blood cells and 1 μm polystyrene particles with 78 ± 8% efficiency and 74 ± 6% purity, respectively, at a flow rate of at least 1 μl/min, enabling to process finger prick blood samples within minutes.  相似文献   

Gender Issues in Higher Education     

Jinghuan Shi  Heidi A. Ross 《Frontiers of Education in China》2010,5(2)

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A Multidisciplinary,Team-Based Teleconsultation Approach to Enhance Child Mental Health Services in Rural Pediatrics     

Kate Margolis  Kimberly Kelsay  Ayelet Talmi  Heidi McMillan  M. Cecile Fraley  John F. Fred Thomas 《Journal of educational and psychological consultation》2018,28(3):342-367

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Appendix A: Scenarios and Questions Used in the Interview     

Melanie Killen  Jennie Lee–Kim  Heidi McGlothlin  & Charles Stangor 《Monographs of the Society for Research in Child Development》2002,67(4):101-106

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Les colonies de vacances en France, 1944–1958: impulsions politiques autour d’un fait social majeur     

Julien Fuchs 《Paedagogica Historica: International Journal of the History of Education》2017,53(5):602-622

Abstract

This article looks at the French state’s approach to the “colonies de vacances” between 1944 and 1958. Created in 1876 by the Reverend Bion in Zurich, these summer camps originated as a charitable institution: their initial purpose was to provide rural retreats and to restore the health of poor urban youth. Set up on French soil in 1880, these institutions gradually grew in France in the late nineteenth and early twentieth centuries. Considered both as complements to the republican school and as extensions of the “patronages” (parish unions), they were important for children and adolescents from the industrial city suburbs, and were enshrined in the leisure policies of the Popular Front from 1936 onwards. After the Second World War, summer camps in France became a major social institution (300,000 children went to summer camps in 1945, 900,000 in 1949) in response to both hygiene and educational needs. Based on the archives of the Directorate of Youth Movements and Popular Education (1944–1947) and the General Directorate of Youth and Sports (1948–1958), this article aims to examine the politics behind the organisation of these summer camps and to demonstrate the social and political importance of these popular educational institutions which, in 1957, involved 1.35 million French children and teenagers. Although the history of French summer camp federations (UFCV, CEMEA, CPVC, UFOVAL, etc.) has been widely studied, how the state sees its role and influences these organisations has mostly been considered indirectly. The intention is to show that among the educational, cultural and sports policies implemented during the Fourth Republic in France, those related to the organisation of “colonies de vacances”, and therefore the organisation of holidays for a very large number of children and teenagers, occupy a significant place. In 1944, the summer camps were widely supported by the French state, which also planned to regulate this booming sector. The creation of qualifications for summer camp staff and directors in 1949 obliged organisations to start training schemes: they trained staff and directors to work in the municipal camps, associations, etc. Security issues led to the state tightening control of the summer camps, their recruitment and their activities. There was a great deal of political investment in these “colonies de vacances” during this period, and this was reflected in the creation of a Ministerial Education Committee in 1950, a general and regional body of inspectors for these camps, etc. However, the considerable expansion of summer camps posed increasing problems at the national political level resulting in changes to the initial subsidy policies. The State played a major part in crucial issues such as the sociological diversification of these institutions and the changes in their social role according to evolving sociocultural trend. The fact remains that the “colonies de vacances” were for the French state a centrepiece of the “popular education” that the political actors of the Fourth Republic wanted to implement in order to build the France of the post-war period..  相似文献   

Immersion,Reflection, Failure: Teaching Graduate Students to Teach Writing Online     

Stephen David Grover  Kelli Cargile Cook  Heidi Skurat Harris  Kevin Eric DePew 《Technical Communication Quarterly》2017,26(3):242-255

ABSTRACT

A common challenge facing those who prepare graduate students to teach writing online is the need to help those students connect online writing instruction (OWI) theory with their classroom practice. The authors present how graduate students are prepared to teach writing online at three universities and then synthesize those approaches to highlight three principles that can guide effective OWI preparation for graduate students in any program: immersion, reflection, and failure.  相似文献