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The purpose of this study was to test the hypothesis that increased availability of blood-borne glucose would improve endurance after carbohydrate loading. A single-leg exercise model was employed, taking advantage of the fact that supercompensation of muscle glycogen occurs only in a previously exercised limb. Endurance time to exhaustion at 70% of maximal oxygen uptake (VO2 max) was determined for 11 males and three females who were then allocated to a control group or a high-carbohydrate (CHO) group. For 3 days following Test 1 the control group maintained a prescribed normal diet whilst the CHO group increased the proportion of energy derived from carbohydrate (62.1 +/- 4.3% cf. 43.9 +/- 2.0%, P less than 0.01). The endurance test was then repeated using the leg that was inactive during Test 1. Endurance time was increased on Test 2 (123.7 +/- 43.2 min cf. 98.5 +/- 21.9 min, P less than 0.05 one-tailed test) for the CHO group but not for the control group (101.8 +/- 21.7 min cf. 107.5 +/- 9.1 min, NS). There was no indication of enhanced carbohydrate metabolism during Test 2 for the CHO group but mean heart rate was lower during Test 2 than during Test 1 (145 +/- 14 beat min-1 cf. 152 +/- 12 beat min-1, P less than 0.05). These results suggest that the prior consumption of a high-carbohydrate diet improves endurance during high-intensity cycling with a limb with normal muscle glycogen concentration. 相似文献
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Rex Wang Phil Scown Cathy Urquhart Julie Hardman 《Education and Information Technologies》2014,19(1):21-39
Facebook is a frequently used Computer Mediated Environment (CME) for students and others to build social connections, with identities and deposited self-expression. Its widespread use makes it appropriate for consideration as an educational tool; though one that does not yet have clear guidelines for use. Whether a social networking site can be used for educational objectives remains largely unexplored as a research question. This paper discusses a study conducted at the University of Auckland and at Manchester Metropolitan University on how their students use Facebook, and its impact on their social and academic lives. Using theories of social capital and knowledge management, we explore some potential educational uses of Facebook. Guidelines are included for the educational use of Facebook by tutors in a university environment. These include both positive recommendations and activities and approaches to avoid; and include educational, administrative and legal issues. 相似文献
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We have previously shown that single-leg training results in improved endurance for exercise with the untrained leg (UTL) as well as for exercise with the trained leg (TL). The purpose of this study was to see whether the improved endurance of the untrained leg could be explained on the basis of changes in muscle metabolism. Exercise time to exhaustion at 80% of maximum oxygen uptake (VO2 max) was determined for each leg separately, pre- and post-training. Muscle metabolite concentrations were measured pre- and post-training in biopsy samples obtained immediately before this endurance test and at the pre-training point of exhaustion (END1). After six weeks of single-leg training endurance time was increased for both the UTL and the TL (UTL 34.0 +/- 16.4 min vs 97.9 +/- 26.3 min, P less than 0.01; TL 28.3 +/- 10.1 min vs 169.0 +/- 32.6 min, P less than 0.01). No changes in muscle metabolite concentrations were found in resting muscle. Training increased muscle ATP (P less than 0.05) and glycogen (P less than 0.01) concentrations and decreased muscle lactate concentration (P less than 0.05) in the TL at END1. No significant changes in muscle metabolite concentrations were found for the UTL. The improved endurance of the contralateral limb after single-leg training could not be explained on the basis of changes in muscle metabolism. 相似文献
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Following is a project sketch of a day program for adjudicated, abusive* and high risk families with babies 8–18 months of age.In order to broaden understanding and treatment of the battered child, four major agencies coordinated efforts to design a network of services under one administration, titled the Parental Stress Center, which houses a residential treatment center for babies 0–12 months. The FACT program is a very recent addition to the Parental Stress Center. This day program may be a transitional placement for families leaving the residential program but in need of continued support and further training, or an initial placement by court mandate.The goals of the program are to insure growth and development of the child and the parent; to assist in establishing more scientific and legally acceptable criteria for court determination and disposition, and to research the effectiveness of the program plan.The FACT program is both diagnostic and therapeutic in nature. The modality simulates a home environment — living, dining, play, nursery, kitchen and bathroom — with an interdisciplinary approach to parent and child, alleviating frustration and stress. By use of materials and affective behavior, a creative learning environment is established. In the church converted apartment parents and children experience a “typical” day's routine alongside teachers who are surrogate, model mothers. Each set of parents are given one day off per week. This “normalizing” factor aids the family in developing a routine which can easily be transferred to their own homes and lives. Simultaneously judicious use of social services helps remove environmental frustrations. In addition case conferences allow other ancillary services to assist in evaluation, diagnosis, prognosis and implementation. Joint conclusions are submitted to the courts quarterly or biannually for further jurisdiction. Although the program is relatively new, emotional and behavioral changes are quite evident in the initial program participants.Pre-service and in-service staff training, based on the program plan and program evaluation, are an integral part of the program.Areas are being explored for further in-depth study. “Effective ways to care for and educate stressful toddlers” or “Methods of transferring modes of parenting from institution to the home” could be areas proposed to the Parental Research team for exploration. 相似文献
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The purpose of this study was to test the hypothesis that increased availability of blood‐borne glucose would improve endurance after carbohydrate loading. A single‐leg exercise model was employed, taking advantage of the fact that supercompensation of muscle glycogen occurs only in a previously exercised limb. Endurance time to exhaustion at 70% of maximal oxygen uptake (VO2max) was determined for 11 males and three females who were then allocated to a control group or a high‐carbohydrate (CHO) group. For 3 days following Test 1 the control group maintained a prescribed normal diet whilst the CHO group increased the proportion of energy derived from carbohydrate (62.1 ± 4.3% cf. 43.9 ± 2.0%, P < 0.01). The endurance test was then repeated using the leg that was inactive during Test 1. Endurance time was increased on Test 2 (123.7 ± 43.2 min cf. 98.5 ± 21.9 min, P <0.05 one‐tailed test) for the CHO group but not for the control group (101.8 ± 21.7 min cf. 107.5 ± 9.1 min, NS). There was no indication of enhanced carbohydrate metabolism during Test 2 for the CHO group but mean heart rate was lower during Test 2 than during Test 1 (145 ± 14 beat min ‐1 cf. 152 ± 12 beat min ‐1, P<0.05). These results suggest that the prior consumption of a high‐carbohydrate diet improves endurance during high‐intensity cycling with a limb with normal muscle glycogen concentration. 相似文献
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Lindsay Hetherington Mark Hardman Jill Noakes Rupert Wegerif 《Studies in Science Education》2013,49(2):141-176
ABSTRACTScience is concerned with understanding the world. As such, engaging with the materiality of that world is integral to both empirical experimentation and theorising within science. However, it has been recognised for some time that the way scientists learn about the world and the way that young people learn about science cannot be simply equated. This difference has been pronounced in recent decades by the dominance of constructivist and social-constructivist theories of learning, which focus on the development of concepts in the minds of people. Whilst these theories have yielded insight into the complexity of learning, the role of the material remains undertheorised, not only within practical science inquiry, but also in relation to the broader materiality of classrooms. Through a detailed critical literature review, this paper demonstrates the need for a stronger theoretical frame through which to understand the role of the material in the learning and pedagogy of science. Building upon the gaps and possibilities that this review reveals, we outline a new material-dialogic theory via a synthesis of Barad’s Agential Realism and Bakhtinian dialogic theory. The significance of this paper lies in offering a theoretical basis for more effective practice. 相似文献
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Despite their important role in the assessment and decision-making process, there has been very little research on the attitudes of educational psychologists (EPs) to inclusion. In this article, we report a recent study in which 144 EPs from 37 English local education authorities responded to a postal questionnaire. This examined their hypothetical and ideal placement of a range of children with different special educational needs, and their orientation to inclusion and beliefs about the nature and process of children's learning. Results reveal that the majority were supportive of inclusion and adopt a social constructionist philosophy toward the nature and process of children's learning. 相似文献
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