‘Strong is the new skinny’: navigating fitness hype among teenagers in northern Sweden     

Emelie Wiklund  Emma Jonsson  Anna-Britt Coe 《Sport, Education and Society》2019,24(5):441-454

An increased interest in health, diet, and physical activity exist among young people, in this study termed ‘fitness hype’. Viewing the body and health as commodities can be understood as part of a healthism discourse. In this study, we explored how Swedish high school students perceive and negotiate the trend regarding exercise, diet and body ideals. Semi-structured interviews were conducted with ten high school students, aged 16–18 years, from various educational programs and with varying levels of physical activity. Using qualitative content analysis, we developd one overarching theme navigating life satisfaction in the face of an ‘unhealthy fitness hype’. Four additional, interrelated categories showed how the young people negotiated this developing trend through: (1) the quest for social recognition and value, (2) social media sets the standards, (3) the paradox of strong and skinny as the new standard, and (4) the need for new safety nets. Our results highlight the young people’s perceptions of an excessive and influential focus on health and exercise in contemporary society. They described a fitness hype as exorbitant and unhealthy ideals of body and exercise, and understood this as problematic. Social media was seen as contributing to this hype as a powerful arena for ‘the quest for social recognition and value’. While not all the young people felt negatively affected by the fitness hype, they perceived its influence on their lives. Further, body and fitness ideals were gendered. Teenage girls faced the paradox of shaping themselves as ‘strong and skinny’. Social ties were recognized as an important safety net, particularly classmates, sports mates, and coaches. Knowledge of these problems from the perspective of young people is crucially needed among health professionals and educators. Further research should explore additional support strategies, and young people’s experiences of fitness hype among additional youth groups.  相似文献   

The effects of an increased calorie breakfast consumed prior to simulated match-play in Academy soccer players     

Marc A. Briggs  Liam D. Harper  Ged McNamee  Emma Cockburn  Penny L.S. Rumbold  Emma J. Stevenson 《European Journal of Sport Science》2017,17(7):858-866

Dietary analysis of Academy soccer players highlights that total energy and carbohydrate intakes are less than optimal, especially, on match-days. As UK Academy matches predominantly kick-off at ～11:00?h, breakfast is likely the last pre-exercise meal and thus may provide an intervention opportunity on match-day. Accordingly, the physiological and performance effects of an increased calorie breakfast consumed ～135-min before soccer-specific exercise was investigated. English Premier League Academy soccer players (n?=?7) repeated a 90-min soccer match simulation on two occasions after consumption of habitual (B_hab; ～1100?kJ) or increased (B_inc; ～2100?kJ) energy breakfasts standardised for macronutrient contributions (～60% carbohydrates, ～15% proteins and ～25% fats). Countermovement jump height, sprint velocities (15-m and 30-m), 30-m repeated sprint maintenance, gut fullness, abdominal discomfort and soccer dribbling performances were measured. Blood samples were taken at rest, pre-exercise, half-time and every 15-min during exercise. Although dribbling precision (P?=?.522; 29.9?±?5.5?cm) and success (P?=?.505; 94?±?8%) were unchanged throughout all time-points, mean dribbling speed was faster (4.3?±?5.7%) in B_inc relative to B_hab (P?=?.023; 2.84 vs 2.75?m?s^?1). Greater feelings of gut fullness (67?±?17%, P?=?.001) were observed in B_inc without changes in abdominal discomfort (P?=?.595). All other physical performance measures and blood lactate and glucose concentrations were comparable between trials (all P?>?.05). Findings demonstrate that Academy soccer players were able to increase pre-match energy intake without experiencing abdominal discomfort; thus, likely contributing to the amelioration of energy deficits on match-days. Furthermore, whilst B_inc produced limited benefits to physical performance, increased dribbling speed was identified, which may be of benefit to match-play.  相似文献   

Study of silica nanoparticles – polysiloxane hydrophobic treatments for stone-based monument protection     

Lavinia de Ferri  Pier Paolo Lottici  Andrea Lorenzi  Angelo Montenero  Emma Salvioli-Mariani 《Journal of Cultural Heritage》2011,12(4):356

The growing interest in the conservation of historic buildings encourages the development of water-repellent materials and methodologies to consolidate and/or protect stones. Recently, particular attention was devoted to composites of inorganic oxides nanoparticles and hybrid siloxane or silicone polymers. Here we present a study on the water repellence of a thin protective coating obtained through sol-gel process starting from Glymo and Dynasylan 40®, and loading the silicate matrix with nano-sized silica particles (Aeroxide LE1® -Degussa-Evonik). The coatings were applied to limestone, sandstone and granite samples. The silica nanoparticles have been characterized by XRD, the siloxane matrix through micro-Raman spectroscopy, while the surface morphology was examined by SEM. The efficacy of the treatments has been evaluated through static contact angle measurements and capillary water absorption. The optical appearance of the coatings was evaluated by colorimetric measurements. Nanoparticles at suitable concentration gave high values for the static contact angle (up to ∼ 150°), for all stone species even for four months exposure to atmospheric conditions. The coatings, in the water capillary absorption tests, however, behave as expected only for granite even if the long-term water direct contact reduces the hydrophobicity.  相似文献   

Consistency of performances in the Tkatchev release and re-grasp on high bar     

Hiley MJ  Yeadon MR  Buxton E 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(2):121-130

The Tkatchev on the high bar is a release and re-grasp skill in which the gymnast rotates in a direction during flight opposite to that of the preceding swing. Since the release window is defined as the time during which the gymnast has appropriate linear and angular momentum to ensure the bar can be re-grasped, it was speculated that the release windows for this skill would be smaller than for dismounts that are less constrained. One senior male gymnast competing at national standard performed 60 Tkatchev trials. A four-segment planar simulation model of the gymnast and high bar was used to determine the release windows in 10 successful and 10 unsuccessful performances of the Tkatchev recorded using a Vicon motion analysis system. Model parameters were optimized to obtain a close match between simulations and recorded performances in terms of rotation angle (1 degree), bar displacements (0.01 m), and release velocities (1%). Each matched simulation was used to determine the time window around the actual point of release for which the model had appropriate release parameters to complete the Tkatchev successfully. The release windows for the successful trials were small compared with those of dismounts. The unsuccessful trials were associated with later release and later timing of the actions at the shoulders and hips.  相似文献   

Différentes représentations utilisant la notion de barycentre     

Emma Castelnuovo 《Educational Studies in Mathematics》1969,2(2-3):307-332

Sans résumé  相似文献   

Publisher–Society partnerships to further image accessibility and global inclusivity in the Humanities and Social Sciences: Comparing top-down and bottom-up approaches     

George Cooper  Katherine Burton  Alejandra Black  Mokheseng Buti  Geraldine Richards  Ginny Herbert  Emma Lockwood  Janet Remmington 《Learned Publishing》2023,36(1):58-67

• Collaboration between publishers and learned society partners can accelerate and amplify DEIA outcomes.
• 97 HSS titles have adopted alt-text publication workflows and this change has been welcomed by journal authors and editors.
• Efforts to promote global inclusivity do not always result in greater membership diversity, retention and growth.
• Top-down, publisher-led DEIA initiatives are effective when they are aligned strategically to pre-existing society initiatives.
• Bottom-up, member-led DEIA initiatives benefit from publisher support to mitigate financial and time-based barriers to active participation.
• To reliably track DEIA outcomes, publishers ought to adopt systematic data collection strategies through initiatives like C4 and the Joint Commitment.

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How do socioeconomic attainment gaps in early mathematical ability arise?     

Ella James-Brabham  Toni Loveridge  Francesco Sella  Paul Wakeling  Daniel J. Carroll  Emma Blakey 《Child development》2023,94(6):1550-1565

Socioeconomic attainment gaps in mathematical ability are evident before children begin school, and widen over time. Little is known about why early attainment gaps emerge. Two cross-sectional correlational studies were conducted in 2018–2019 with socioeconomically diverse preschoolers, to explore four factors that might explain why attainment gaps arise: working memory, inhibitory control, verbal ability, and frequency of home mathematical activities (N = 304, 54% female; 84% White, 10% Asian, 1% black African, 1% Kurdish, 4% mixed ethnicity). Inhibitory control and verbal ability emerged as indirect factors in the relation between socioeconomic status and mathematical ability, but neither working memory nor home activities did. We discuss the implications this has for future research to understand, and work towards narrowing attainment gaps.  相似文献   

Exploring how children with reading difficulties respond to instructional supports in literacy games and the role of prior knowledge     

Laura Benton  Nelly Joye  Emma Sumner  Andrea Gauthier  Seray Ibrahim  Asimina Vasalou 《British journal of educational technology : journal of the Council for Educational Technology》2023,54(5):1314-1331

Digital literacy games can be beneficial for children with reading difficulties as a supplement to classroom instruction and an important feature of these games are the instructional supports, such as feedback. To be effective, feedback needs to build on prior instruction and match a learner's level of prior knowledge. However, there is limited research around the relationship between prior knowledge, instruction and feedback in the context of learning games. This paper presents an empirical study exploring the influence of prior knowledge on response to feedback, in two conditions: with or without instruction. Thirty-six primary children (age 8–11) with reading difficulties participated: each child was assessed for their prior knowledge of two suffix types—noun and adjective suffixes. They subsequently received additional instruction for one suffix type and then played two rounds of a literacy game—one round for each suffix type. Our analysis shows that prior knowledge predicted initial success rates and performance after a verbal hint differently, depending on whether instruction was provided. These results are discussed with regards to learning game feedback design and the impact on different types of knowledge involved in gameplay, as well as other game design elements that might support knowledge building during gameplay.

Practitioner notes

What is already known about this topic

• Instructional supports, such as elaborative feedback, are a key feature of learning games.
• To be effective, feedback needs to build on prior instruction and match a learner's level of prior knowledge.
• Prior knowledge is an important moderator to consider in the context of elaborative feedback.

What this paper adds

• Providing additional instruction (eg, pre-training) may act as a knowledge enhancer building on children's existing disciplinary expertise, whereas the inclusion of elaborative feedback (eg, a hint) could be seen as a knowledge equaliser enabling children regardless of their prior knowledge to use the pre-training within their gameplay.
• Highlights the importance of children's preferred learning strategies within the design of pre-training and feedback to ensure children are able to use the instructional support provided within the game.
• Possible implications for pre-training and feedback design within literacy games, as well as highlighting areas for further research.

Implications for practice and/or policy

• Pre-training for literacy games should highlight key features of the learning content and explicitly make connections with the target learning objective as well as elaborative feedback.
• Pre-training should be combined with different types of in-game feedback for different types of learners (eg, level of prior knowledge) or depending on the type of knowledge that designers want to build (eg, metalinguistic vs. epilinguistic).
• Modality, content and timing of the feedback should be considered carefully to match the specific needs of the intended target audience and the interaction between them given the primary goal of the game.

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Childhood acquired brain injury: the knowledge and training needs of special educational needs coordinators     

Emily Bennett  Shirley Thomas  Emma Woolf 《Support for Learning》2022,37(2):209-224

The aim of this study was to further explore Special Educational Need Co-ordinators' (SENCos) knowledge of childhood acquired brain injury (ABI) and if they have received training on how to effectively support children and young people (CYP) with an ABI in school. SENCos from Nottinghamshire were asked to complete a survey face-to-face or online. Data reported by Howe and Ball (Support for Learning, 32, 1, 85–100), was also used to allow comparisons between different counties in the UK for knowledge of childhood ABI. Results indicated that SENCos from Nottinghamshire hold numerous uncertainties about childhood ABI, although less uncertainties than SENCos from the West Midlands. A majority SENCos from Nottinghamshire had not received training about childhood ABI. Additional challenges in supporting CYP with an ABI were also identified. The findings show a clear need for more training on childhood ABI across UK schools. It is also apparent that obtaining funding for CYP with an ABI can be a challenge for SENCos. However, further research is needed to determine what these barriers to funding are.  相似文献