Mediating effects of resistance training skill competency on health-related fitness and physical activity: the ATLAS cluster randomised controlled trial     

Jordan J. Smith  Philip J. Morgan  Ronald C. Plotnikoff  David F. Stodden  David R. Lubans 《Journal of sports sciences》2016,34(8):772-779

The purpose of this study was to examine the mediating effect of resistance training skill competency on percentage of body fat, muscular fitness and physical activity among a sample of adolescent boys participating in a school-based obesity prevention intervention. Participants were 361 adolescent boys taking part in the Active Teen Leaders Avoiding Screen-time (ATLAS) cluster randomised controlled trial: a school-based program targeting the health behaviours of economically disadvantaged adolescent males considered “at-risk” of obesity. Body fat percentage (bioelectrical impedance), muscular fitness (hand grip dynamometry and push-ups), physical activity (accelerometry) and resistance training skill competency were assessed at baseline and post-intervention (i.e., 8 months). Three separate multi-level mediation models were analysed to investigate the potential mediating effects of resistance training skill competency on each of the study outcomes using a product-of-coefficients test. Analyses followed the intention-to-treat principle. The intervention had a significant impact on the resistance training skill competency of the boys, and improvements in skill competency significantly mediated the effect of the intervention on percentage of body fat and the combined muscular fitness score. No significant mediated effects were found for physical activity. Improving resistance training skill competency may be an effective strategy for achieving improvements in body composition and muscular fitness in adolescent boys.  相似文献   

Dribbling determinants in sub-elite youth soccer players     

Matteo Zago  Andrea Gianluca Piovan  Isabella Annoni  Daniela Ciprandi  F. Marcello Iaia 《Journal of sports sciences》2016,34(5):411-419

Dribbling speed in soccer is considered critical to the outcome of the game and can assist in the talent identification process. However, little is known about the biomechanics of this skill. By means of a motion capture system, we aimed to quantitatively investigate the determinants of effective dribbling skill in a group of 10 Under-13 sub-elite players, divided by the median-split technique according to their dribbling test time (faster and slower groups). Foot-ball contacts cadence, centre of mass (CoM), ranges of motion (RoM), velocity and acceleration, as well as stride length, cadence and variability were computed. Hip and knee joint RoMs were also considered. Faster players, as compared to slower players, showed a 30% higher foot-ball cadence (3.0 ± 0.1 vs. 2.3 ± 0.2 contacts · s^?1, P < 0.01); reduced CoM mediolateral (0.91 ± 0.05 vs. 1.14 ± 0.16 m, P < 0.05) and vertical (0.19 ± 0.01 vs. 0.25 ± 0.03 m, P < 0.05) RoMs; higher right stride cadence (+20%, P < 0.05) with lower variability (P < 0.05); reduced hip and knee flexion RoMs (P < 0.05). In conclusion, faster players are able to run with the ball through a shorter path in a more economical way. To effectively develop dribbling skill, coaches are encouraged to design specific practices where high stride frequency and narrow run trajectories are required.  相似文献   

高职市场营销专业职业技能培养的思考   总被引：2，自引：0，他引：2  

翟方葆 《襄樊职业技术学院学报》2003,2(3):39-41

高职市场营销专业职业技能培养目标应体现出实用性，职业技能教学要突出训练性，职业技能考核要体现开放性，这样才能更好地体现出高职的教育特色，有利于学生职业技能的形成。  相似文献   

基于VBA的图文混排题库系统的建立   总被引：2，自引：0，他引：2  

王延涛  王艳辉 《通化师范学院学报》2004,25(2):36-38

基于Visual Basic for Applications(VBA)发展了一种新型题库系统，使题库的录入、抽题、试卷生成均在Word下进行，很好地解决了图混排问题，同时给题库程序开发人员和用户提供了一个更为方便、快捷的界面，是一种很有前途的题库系统。  相似文献   

Pepper Spray Cop and the American Dream: Using Synecdoche and Metaphor to Unlock Internet Memes’ Visual Political Rhetoric     

Heidi E. Huntington 《Communication Studies》2016,67(1):77-93

Social media are increasingly important in protest movements for communication and organization. As such, scholars should consider these ephemeral messages as a tool for understanding such movements’ rhetoric. This article draws on Kjeldsen’s method for the critique of visual political rhetoric and adds consideration of intertextuality, synecdoche, and metaphor to demonstrate a method for the rhetorical analysis and a critique of Internet memes as visual, political rhetoric. The Pepper Spray Cop meme arising from Occupy Wall Street is presented as a case-study example. The article considers the centrality of the intertextual nature of memes as a unique form of visual rhetoric in activist contexts and contributes to the literature on user-generated and activist rhetoric.  相似文献   

Visual Basic中的菜单设计原则和编程技巧     

方园 《北京工业职业技术学院学报》2003,(4)

论述标准Windows应用程序界面设计的基本原则,主要是菜单的设计原则。以及在VB环境中菜单制作的方法和动态菜单实现。  相似文献   

Visual body pedagogies: how anti-oppressive education informs the teaching and learning of sporting bodies     

Robert E. Owens  Roger G. LeBlanc  Pam K. Brown 《Sport, Education and Society》2016,21(5):661-676

In this article, the authors borrow from anti-oppressive education theory for its potential to disrupt how students visually conceive sporting bodies and to problematize the teaching and learning of these bodies within undergraduate physical education (PE) programs. Fourteen photo stories produced by students enrolled in PE programs at two universities were analysed using a semiotic approach to excavate the emergent themes of sporting bodies from the narratives. Relying on Kumashiro's anti-oppressive educational theoretical framework, the authors found that most of stories reified discursive practices that (re)produce gender oppression in sport. Despite these findings, the authors also discovered anti-oppressive pedagogies are useful for teaching against the body oppressions conveyed in the photo stories. How anti-oppressive education informs other areas of PE should be examined in the future.  相似文献   

言语技能的掌握与外语基本能力的培养     

郝勇 《湖北广播电视大学学报》2006,23(1):51-53

掌握外语不仅要掌握关于外语的知识,重要是熟练运用外语的各种言语技能。外语的各种技能之间有着不同程度的依存关系,或相互影响,或相互补充,对一种技能的掌握有利于另一种技能的发展。从学习者的心理特点上看,掌握外语言语技能可以分为三个层级。提高外语教学质量的关键就在于如何有效地推动和加速三个掌握层级上的发展和变化,而加速三个掌握层级的发展变化的基本途径就是要培养学习者的基本外语能力。  相似文献   

基于VB的试卷生成系统的开发     

任兆香  张乐峰 《天津工程师范学院学报》2003,13(4):20-24

介绍了用VB开发的试卷生成系统的功能特点、主界面、整体程序结构框图,以及设计过程中题库目录验证、章数与题量显示、各单元抽题数量的确定及生成分试卷和总体试卷等主要环节的编程技术。该系统以有关课程题库为背景进行了上机调试,均能可靠运行。  相似文献   

试论师范生拜师学艺的意义     

王叔新 《台州学院学报》2007,29(1):59-62

师范生拜师学艺是实践教学改革的产物。在高等教育大众化的历史趋势和以实践创新为主基调的新世纪教育背景下,拜师学艺能促进理论联系实际,提高课堂教学质量和效益;能有效地提高师范生实践教学能力;能密切高校与中小学的联系;能为教育改革发展提供借鉴,为师范生的职前培养和职后发展开辟广阔的空间。  相似文献