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1.
Abstract

Maternal dietary habits influence maternal and foetal health, representing a pathway for intervention to maximise pregnancy outcomes. Advice on energy intake is provided on a trimester basis, with no additional calories required in the first trimester and an additional 340?kcal?d?1 and 452?kcal?d?1 needed for the second and third trimesters. Energy intake depends on pre-gravid body mass index (BMI); underweight women are recommended an increase of 150, 200 and 300?kcal?d?1 during the first, second and third trimester, normal weight women an increase of 0, 350 and 500?kcal?d?1 and obese women an increase of 0, 450 and 350?kcal?day?1. The recommendations for carbohydrate and protein intake are 175?g?d?1 and 0.88–1.1?g?kgBM?d?1, with no change to fat intake. The number of pre-gravid obese women is rising; therefore, we need to regulate weight in women of childbearing age and limit gestational weight gain to within the recommended ranges [overweight women 6.8–11.3?kg and obese women 5.0–9.1?kg]. This can be achieved using nutritional interventions, as dietary changes have been shown to help with gestational weight management. As pregnancy has been identified as a risk factor for the development of obesity, normal weight women should gain 11.5–16.0?kg during pregnancy. While some research has shown that dietary interventions help to regulate gestational weight gain and promote postpartum weight loss to some extent, future research is needed to provide safe and effective guidelines to maximise these effects, while benefitting maternal and foetal health.  相似文献   
2.
Race walking is an Olympic event where no visible loss of contact should occur and the knee must be straightened until midstance. The purpose of this study was to analyse ground reaction forces of world-class race walkers and associate them with key spatiotemporal variables. Nineteen athletes race walked along an indoor track and made contact with two force plates (1000 Hz) while being filmed using high-speed videography (100 Hz). Race walking speed was correlated with flight time (r = .46, p = .049) and flight distance (r = .69, p = .001). The knee's movement from hyperextension to flexion during late stance meant the vertical push-off force that followed midstance was smaller than the earlier loading peak (p < .001), resulting in a flattened profile. Athletes with narrower stride widths experienced reduced peak braking forces (r = .49, p = .046), peak propulsive forces (r = .54, p = .027), peak medial forces (r = .63, p = .007) and peak vertical push-off forces (r = .60, p = .011). Lower fluctuations in speed during stance were associated with higher stride frequencies (r = .69, p = .001), and highlighted the importance of avoiding too much braking in early stance. The flattened trajectory and consequential decrease in vertical propulsion might help the race walker avoid visible loss of contact (although non-visible flight times were useful in increasing stride length), while a narrow stride width was important in reducing peak forces in all three directions and could improve movement efficiency.  相似文献   
3.
There are established links between education and well-being, and between poverty and education. This article draws on interviews with parents of school-aged children impacted by a policy in the UK commonly referred to as the ‘bedroom tax’. A critical psychology perspective to education is put forward, acknowledging the complex interrelationships between psychological well-being, sociopolitical factors and education.  相似文献   
4.
This article explores an aspect of Karl Marx’s concept, praxis. Praxis is meaningful work, through which we fulfil ourselves by fulfilling others. The discussion draws on the author’s work with postgraduate student teachers, where both students and author were researching their own practice. Reflecting Marx’s conception of praxis as subjective fulfilment in the objective world, this activity was intended to trouble and complicate the categories ‘subjective’ and ‘objective’, whilst enabling students to become both more autonomous and other-oriented. The intention behind this article is to develop the theoretical vocabulary of praxis available to educational researchers and practitioners. Some ideas from Lacanian psychoanalysis are introduced, followed by extensive discussion of Slavoj ?i?ek’s concepts, ‘act’ and ‘event’. The key argument is that in a nascent educative praxis, ‘subjective’ and ‘objective’ perspectives can be understood not as fixed points of reference, but as dual orientations on a flow of signification. These ideas are developed alongside detailed examination of two university-based research sessions with student teachers. With reference to session activities, a rationale is provided for an emerging educative praxis, in which students explore creative tensions between ‘subjective’ and ‘objective’ perspectives on school-based practice.  相似文献   
5.
ABSTRACT

The paper presents a theorisation of pedagogic knowledge formation, as a continuous attempt to understand the positions in discourse we occupy. The paper documents some participatory practitioner research by teacher educators centred on a course development initiative for student teachers of English, at an English university. Students researched their experiences of becoming a teacher within a course that was largely school-based, whilst their tutors researched their own involvement in the process (the main focus of this paper). Drawing on Lacanian theory, tutors are depicted as learning subjects having more or less certainty or doubt about the knowledge they possess. In attempting to understand this interplay of certainty and doubt, tutors arrive at stronger conceptualisations of learning. Through this approach, the paper provides a theoretically informed conception of professional knowledge, as involving a process of renewing ideas about learning, in meeting or resisting external demands.  相似文献   
6.
The aim of the present study was to examine the spelling development of Greek‐speaking children in the early school grades. Although Greek orthography is regular for reading, it is much less transparent as far as spelling is concerned. Spelling development was investigated using a word spelling task designed to explore the effects of word length, familiarity and spelling regularity. One hundred and fifty normally developing primary school children living in Cyprus took part in the study. Results suggest that the children employed both phonological and lexical strategies in spelling Greek words. Results indicated that sub‐lexical procedures were more marked for younger children, whereas lexical processing was employed more widely by older children. The findings are interpreted in terms of stage developmental models.  相似文献   
7.
The aim of this study was to describe the pacing profiles and packing behaviour of athletes competing in the IAAF World Half Marathon Championships. Finishing and split times were collated for 491 men and 347 women across six championships. The mean speeds for each intermediate 5 km and end 1.1 km segments were calculated, and athletes grouped according to finishing time. The best men and women largely maintained their split speeds between 5 km and 15 km, whereas slower athletes had decreased speeds from 5 km onwards. Athletes were also classified by the type of packing behaviour in which they engaged. Those who ran in packs throughout the race had smaller decreases in pace than those who did not, or who managed to do so only to 5 km. While some athletes’ reduced speeds from 15 to 20 km might have been caused by fatigue, it was also possibly a tactic to aid a fast finish that was particularly beneficial to medallists. Those athletes who ran with the same competitors throughout sped up most during the finish. Athletes are advised to identify rivals likely to have similar abilities and ambitions and run with them as part of their pre-race strategy.  相似文献   
8.
Educational Studies in Mathematics - In this article, we report on a typology of the demands of statistical and mathematical products (StaMPs) embedded in media items related to the COVID-19...  相似文献   
9.
Educational Studies in Mathematics - In this article, we document the support provided by highly recognised journals in Mathematics Education in response to the challenges faced by English...  相似文献   
10.
This paper puts forward a framework for supervising teaching staff whose roles involve supporting the emotional well-being of young people and young adults. Initially, the increasing focus upon the interface between education and health is outlined and the potential for this ‘emotional labour’ to cause distress to those in helping roles is considered. Further, as a means of supporting these professionals, the rationale for, and importance of, reflexive practice is outlined. As such, self-care is promoted and clinical supervision related to this work is recommended. To account for the wide variety of ways of working with young people, a pluralistic framework for group supervision is outlined. This psychologically informed framework emphasises the importance of the supervisory alliance and breaks down the process into supervisory goals, tasks and methods. Each element is briefly described and the framework is suggested as a means of supporting those working in these contexts. This proposition is considered alongside a number of associated potential challenges and is outlined purposefully as a provocation to consider the implications of working in such a way within school settings.  相似文献   
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