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Gabriel Lozano-Berges Alejandro Gómez-Bruton Ángel Matute-Llorente Cristina Julián-Almárcegui Alba Gómez-Cabello Alejandro González-Agüero 《Research quarterly for exercise and sport》2017,88(2):230-236
Purpose: The aim of the present study was to determine which of the published anthropometric equations is the most appropriate to estimate body-fat percentage (BF%) in adolescent swimmers. Method: Eighty-eight swimmers (45 boys, 43 girls) participated in this study. Following the recommendations of the International Society of the Advancement of Kinanthropometry, biceps, triceps, subscapular, iliac-crest, supraspinale, front-thigh, and medial calf skinfold thicknesses were measured. Waist, hip, midthigh, calf, relaxed arm, and arm flexed and tensed girths were also registered. BF% was measured with dual-energy X-ray absorptiometry (DXA) to obtain the reference value. Existing anthropometric equations were applied, and BF% results obtained from anthropometric equations were compared to DXA BF% results with the modified Bland-Altman. Results: The Flavel, Durnin-Rahaman-Siri, and Durnin-Rahaman-Brozek were the only equations that did not demonstrate statistically significant differences when compared with DXA. Conclusion: The present study showed that the best anthropometric equation from existing literature to estimate BF% in swimmers is that proposed by Durnin-Rahaman (independently of applying the Siri or Brozek equation). 相似文献
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Carlos Cristi-Montero Javier Courel-Ibez Francisco B. Ortega Jose Castro-Piero Alba Santaliestra-Pasias Angela Polito Jrmy Vanhelst Ascensin Marcos Luis M. Moreno Jonatan R. Ruiz HELENA study group 《运动与健康科学(英文)》2021,10(3):360-367
PurposeThis study was aimed to analyze the mediation role of cardiorespiratory fitness (CRF) on the association between fatness and cardiometabolic risk scores (CMRs) in European adolescents.MethodsA cross-sectional study was conducted in adolescents (n = 525; 46% boys; 14.1 ± 1.1 years old, mean ± SD) from 10 European cities involved in the Healthy Lifestyle in Europe by Nutrition in Adolescence study. CRF was measured by means of the shuttle run test, while fatness measures included body mass index (BMI), waist to height ratio, and fat mass index estimated from skinfold thicknesses. A clustered CMRs was computed by summing the standardized values of homeostasis model assessment, systolic blood pressure, triglycerides, total cholesterol/high-density lipoprotein cholesterol ratio, and leptin.ResultsLinear regression models indicated that CRF acted as an important and partial mediator in the association between fatness and CMRs in 12–17-year-old adolescents (for BMI: coefficients of the indirect role β = 0.058 (95% confidence interval (95%CI): 0.023–0.101), Sobel test z = 3.11 (10.0% mediation); for waist to height ratio: β = 4.279 (95%CI: 2.242–7.059), z =3.86 (11.5% mediation); and for fat mass index: β = 0.060 (95%CI: 0.020–0.106), z = 2.85 (9.4% mediation); all p < 0.01).ConclusionIn adolescents, the association between fatness and CMRs could be partially decreased with improvements to fitness levels; therefore, CRF contribution both in the clinical field and public health could be important to consider and promote in adolescents independently of their fatness levels. 相似文献
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Despite an increasing array of ‘quality indicators’ and substantial investments in educating professionals, there continues to be clear evidence of discordant, or even negligent, practice by accredited professionals. We refer to discordant professional practice as being ‘out of tune’ with what is accepted as good practice. In a conceptual/theoretical analysis, we use discordant practice as a backdrop to exploring ways of being professionals. Our analysis is grounded in Heidegger’s notion of being-in-the-world. We explore how being-in-the-world can be uncanny and discordant, while at the same time, dwelling in the world implies familiarity and a sense of being ‘at home’. We also draw upon Merleau-Ponty’s arguments that know-how is performed, settling in the body to become habitual, while also incorporating others and things in the accomplishment of practice. We argue that conceiving know-how as knowing/being provides insights into what is entailed in learning to be professionals. 相似文献
25.
Judith Sowder Barbara Armstrong Susan Lamon Martin Simon Larry Sowder Alba Thompson 《Journal of Mathematics Teacher Education》1998,1(2):127-155
The middle-grades mathematics related to multiplicative structures has undergone careful scrutiny over the past decade. Researchers
have identified the types of reasonings involved; the difficulties students have with the concepts and why these difficulties
might occur; and the interconnections within this content area. On the basis of this research we make four recommendations
for the preparation and professional development of teachers. The recommendations deal with different but related forms of
reasoning: quantitative reasoning, multiplicative reasoning, proportional reasoning, and reasoning with rational numbers.
Problematic issues that follow from the recommendations are discussed.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
26.
Alba Práxedes Fernando Del Villar Álvarez Alberto Moreno Alexander Gil-Arias Keith Davids 《Physical Education & Sport Pedagogy》2019,24(4):332-343
Purpose: This study analysed the effects of a training intervention programme using principles of Non-Linear Pedagogy (NLP) on the decision making (DM) and performance behaviours (P) of youth footballers.
Method: 19 footballers (U12 yrs) participated in 14 training sessions, spread over three phases: Pre-intervention, Intervention, Retention. The intervention was based on Small-Sided and Conditioned Games. We assessed progress during the intervention phase at two different points: intermediate and final. The GPET instrument was used to analyse the DM and P during the completion of 3208 passes in the intervention.
Results: Results shown significant improvements in the DM and P after the intermediate and final points of the acquisition phase. Moreover, significantly higher values were also obtained in both variables in the retention, compared to the pre-intervention phase.
Conclusion: Results indicated that the NLP intervention programme was effective in improving both aspects of team games performance in youth players, with effects consolidated over time. 相似文献
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Frustration is an emotional state produced by the surprising omission in quantity and/or quality of an appetitive reinforcer.
The aversive properties of stressors, such as electric shocks, produce responses similar to those elicited by a state of frustration.
In this set of three experiments, we assessed the effects of water immersion (WIM, in Experiment 1)—that is, a physical stressor—and
first (in Experiments 1 and 2) and second trials of a consummatory extinction (cE; i.e., a surprising reward omission; in
Experiment 3) on the sexual behavior of male rats, as compared with nonstressed animals. The results showed a sexual deficit
in the animals subjected to either WIM or cE, relative to control subjects, although these experimental conditions differed
in the component of the male sexual response that was affected. The present results accord with the fear = frustration hypothesis,
and with Amsel’s frustration theory. 相似文献
28.
de Alba Alicia 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1999,45(5-6):431-443
This article argues that the link between educational curricula and society as a whole has become critically uncertain. This crisis is linked to a number of factors related to the post-modern world view, including: the disappearance of grand utopian social visions of the kind that used to underpin educational policy; the lack of adequate theoretical tools; and the way in which academics are exposed to a multitude of different cultural norms. The author argues that this situation calls for a fundamental re-thinking of the link between curriculum and society, based on a more flexible and pluralistic approach. 相似文献
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Lledó Gonzalo Lorenzo Lledó Asunción Gilabert-Cerdá Alba Lorenzo-Lledó Alejandro 《Education and Information Technologies》2022,27(4):4865-4885
Education and Information Technologies - In today's society, technology plays a fundamental role. More and more activities of daily life are being developed with the help of technology. One of... 相似文献