Energy cost of different skating techniques in cross-country skiing     

Millet GP  Boissiere D  Candau R 《Journal of sports sciences》2003,21(1):3-11

The aims of this study were to compare the aerobic energy cost of four 'on-snow' skating techniques in cross-country skiing and to examine the relationships between performance and aerobic energy cost. Twelve male skiers from recreational to national standard performed four level skating trials of 6 min duration in random order, each at the same submaximal velocity but with a different skating technique: (1) 'offset' (V1), using a double asymmetrical and asynchronous pole plant as weight is transferred to one ski; (2) 'two-skate' (V2A), where the pole plant is symmetrical; (3) 'one-skate' (V2), where there is a pole plant as weight is transferred to each ski; and (4) 'conventional', without poles. Oxygen uptake (VO2), pulmonary ventilation, the respiratory exchange ratio and heart rate were measured using a K4(b2) portable gas analyser. The aerobic energy cost (VO2/mean speed) and heart rate were higher (P < 0.05) in the one-skate than in the offset condition. This may be explained by the greater and more efficient use of the upper body and the lower variation in centre of gravity velocity in the offset condition. The aerobic energy cost was 5-9% higher (P < 0.01) in the conventional than in the other techniques, probably because of the shorter duration of propulsive forces within a cycle in the conventional skating condition. Moreover, in ski skating, the mechanical efficiency (propulsive forces/total forces) was shown to be higher in the upper than in the lower limbs. The correlation coefficient between performance and aerobic energy cost was significant in the two-skate (r = 0.68, P = 0.02), one-skate (r = 0.72, P = 0.01) and conventional (r = 0.62, P = 0.04) conditions, but not in the offset condition (r = 0.50, P = 0.10). Our results stress the importance of the upper body component in cross-country skiing and that the aerobic energy cost discriminates between skiers of different standards.  相似文献   

Public Choices and Social Learning: The New Multimedia Technologies in Europe     

Robin Williams 《The Information Society》2000,16(4):251-262

  相似文献   

Talk in Eleven Year Old Children's Response Groups     

Robin J. Dixon 《English in Education》1985,19(2):36-44

  相似文献   

Basecamp     

Robin Featherstone 《Journal of the Medical Library Association》2009,97(1):67

  相似文献   

Checking and adjusting the lens: case study clearance     

Robin Yeomans 《Cambridge Journal of Education》1987,17(2):89-90

  相似文献   

#MeToo,sexual harassment: an article,a forum,and a dream for the future     

Robin Patric Clair  Nadia E. Brown  Debbie S. Dougherty  Hannah K. Delemeester  Patricia Geist-Martin  William I. Gorden 《Journal of Applied Communication Research》2019,47(2):111-129

#MeToo has breathed new life into the women’s movement and especially into understanding and rectifying sexual harassment, abuse and assault. It has galvanized activists around the globe. And it has placed thousands of stories of the harassed in full view of the public. Sexual harassment, abuse and assault may occur within the organizational context or beyond; but sexual harassment, in particular has been legally labeled an organizational phenomenon. With this in mind, Robin Clair frames the early part of this article around the most recent organizational communication theories (see the appendix for an overview of these theories). Following the essay is a forum, in which invited scholars address questions related to the #MeToo movement.  相似文献   

Theoretical Frameworks of Performance‐Based Models     

Robin Tamez 《Performance Improvement》2016,55(6):19-24

The purpose of this article is to highlight theories that support the functions of performance‐based design models and to discuss the implications of integrating divergent models into the system‐oriented human performance technology (HPT) and performance improvement (PI) disciplines. HPT, PI, and instructional systems design (ISD) share a systems framework, along with the influence of common theories such as performance theory, learning theory, adult learning, cognitive psychology, and behavioral psychology (Foshay, Villachica, & Stepich, 2014). This article focuses on the role of theory as a tool in the practitioner's toolbox and as a connection point when working with teams and organizations that have different theoretical orientations. Performance‐based ISD models are discussed, including Robinson and Robinson's (1989) Training for Impact, Brethower and Smalley's (1998) Performance‐Based Instruction, and Bradford and Boler's (2015) Horizon Model. Allen and Sites's (2012) successive approximation model (SAM) retains elements of ADDIE as a process, but the model is iterative rather than systematic in design.  相似文献   

A Gem State Academic Program Profile: Department of Organizational Learning and Performance at Idaho State University     

Karen Wilson Scott  Robin L. Lindbeck  Robert W. Lion 《Performance Improvement》2016,55(7):32-40

  相似文献   

Reviewing the Family Unit as a Stakeholder in Talent Development: Is It Undervalued?     

Robin David Taylor  Dave Collins 《Quest (Human Kinetics)》2015,67(3):330-343

As elite youth sport becomes more organized and professionalized, the role of the family is increasingly acknowledged as being significant in the development of young talent. High-profile examples across a range of professional sports, both positive and negative, have drawn attention toward this important stakeholder. Accordingly, this review first examines the key issues in relation to family involvement in talent development in relation to what is perceived as good and bad practice on behalf of the family. Next the key theoretical underpinning is considered, Family Systems Theory, and how it may be integrated within elite youth sport. Finally, the article concludes with a summary of where the current literature leaves us and where we can progress from here. Two possible inputs are suggested that could benefit the effectiveness of family involvement: a focus on the family holistically and a second on the role different family members can play.  相似文献   

Do values drive the plan? Investigating the nature and role of organizational values in university strategic planning     

Mueller  Robin Alison 《Tertiary Education and Management》2015,21(1):41-55

Strategic planning is a common practice at higher education institutions. Furthermore, it is assumed that identifying organizational values is an essential part of the planning process. Values are often construed as foundational elements of strategic thinking that serve to ‘drive the plan’. However, there is little conceptual or applied evidence to support the effectiveness of coupling organizational values articulation with strategic planning processes. The author reports on a study that was designed to effectively conceptualize organizational values, and foster a deeper understanding of organizational values application in higher education administration. This research involved a textual analysis of strategic planning documents pertaining to organizational values from Canadian universities. Research results offer concrete ways to conceptualize and apply organizational values within university settings. The results serve as a foundation to explore small-group-focused approaches to both policy creation and evaluation pertaining to the articulation of organizational values in university administration.

  相似文献