The validity and reliability of a sample of 10 Wattbike cycle ergometers     

Barney Wainwright  Carlton Brian Cooke  John Paul O’Hara 《Journal of sports sciences》2017,35(14):1451-1458

ABSTRACT

The purpose of the study was to assess the validity and inter-bike reliability of 10 Wattbike cycle ergometers, and to assess the test–retest reliability of one Wattbike. Power outputs from 100 to 1000 W were applied using a motorised calibration rig (LODE) at cadences of 70, 90, 110 and 130 rev · min^?1, which created nineteen different intensities for comparison. Significant relationships (P < 0.01, r² = 0.99) were found between each of the Wattbikes and the LODE. Each Wattbike was found to be valid and reliable and had good inter-bike agreement. Within-bike mean differences ranged from 0.0 W to 8.1 W at 300 W and 3.3 W to 19.3 W at 600 W. When taking into account the manufacturers stated measurement error for the LODE (2%), the mean differences were less than 2%. Comparisons between Wattbikes at each of the nineteen intensities gave differences from 0.6 to 25.5 W at intensities of 152 W and 983 W, respectively. There was no significant difference (P > 0.05) between the measures of power recorded in the test–retest condition. The data suggest that the Wattbike is an accurate and reliable tool for training and performance assessments, with data between Wattbikes being able to be used interchangeably.  相似文献   

Computerized Agility Training Improves Change-of-Direction and Balance Performance Independently of Footwear in Young Adults     

Max R. Paquette  Brian K. Schilling  Joshua D. Bravo  Shelby A. Peel  Yuhua Li  Robert J. Townsend 《Research quarterly for exercise and sport》2017,88(1):44-51

Understanding the effects of training in different footwear on sporting performance would be useful to coaches and athletes. Purpose: This study compared the effects of computerized agility training using 3 types of footwear on change-of-direction and balance performance in young adults. Method: Thirty recreationally active young adults (M_age = 22.8 ± 3.1 years; M_height = 1.71 ± 0.7 m; M_bodymass = 73.4 ± 10.3 kg) were randomly assigned to a 6-week computerized agility training intervention in 1 of 3 footwear groups (n = 10/group): barefoot, minimal footwear, or traditional shoes. Participants had no previous barefoot or minimal-footwear training experience. Dependent variables included change-of-direction test time to completion, Star Excursion Balance Test, and single-leg stability evaluation. Testing was performed at the start of the training program, after 2 weeks, after 4 weeks, and at the end of the training program. Results: No group or time interactions were found for any of the dependent variables. Time main effects were observed for the performance measures of change of direction, Star Excursion, and single-leg-with-eyes-open stability evaluation. Participants improved in all 3 tests as early as 2 weeks into the intervention, with improvements continuing through the entire 6-week intervention. Conclusions: The lack of interaction and footwear effects suggests that agility and balance improvements during foot agility training are independent of footwear in a recreationally active young-adult population. Computerized agility training improves change-of-direction and balance performance within 2 weeks of training implementation. Future studies should consider footwear training effects in different populations, including frail older adults and athletes.  相似文献   

Correction to: Computerized Agility Training Improves Change-of-Direction and Balance Performance Independently of Footwear in Young Adults     

Max R. Paquette  Brian K. Schilling  Joshua D. Bravo  Shelby A. Peel  Yuhua Li  Robert J. Townsend 《Research quarterly for exercise and sport》2017,88(2)

  相似文献   

Boundary-Work in the Health Research Field: Biomedical and Clinician Scientists’ Perceptions of Social Science Research     

Mathieu Albert  Suzanne Laberge  Brian D. Hodges 《Minerva》2009,47(2):171-194

Funding agencies in Canada are attempting to break down the organizational boundaries between disciplines to promote interdisciplinary research and foster the integration of the social sciences into the health research field. This paper explores the extent to which biomedical and clinician scientists’ perceptions of social science research operate as a cultural boundary to the inclusion of social scientists into this field. Results indicated that cultural boundaries may impede social scientists’ entry into the health research field through three modalities: (1) biomedical and clinician scientists’ unfavourable and ambivalent posture towards social science research; (2) their opposition to a resource increase for the social sciences; and (3) clinician scientists procedural assessment criteria for social science. The paper also discusses the merits and limitations of Tom Gieryn’s concept of boundary-work for studying social dynamics within the field of science.

Brian D. HodgesEmail:

  相似文献   

Bookreviews     

A. D. C. Peterson  Brian Holmes  G. De Landsheere  Helena W. F. Stellwag  Oskar Anweiler  J. O. J. Vanden Bossche  Abraham Robinson  F. I. Calvert  H. H. Stern  J. F. Willatt  Sydney Taylor  M. J. Langeveld  M. A. Brimer  T. N. Postlethwaite  Alexandre Vexliard 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1964,10(1):106-126

  相似文献   

Rollback,scissor-like closure of the Mongol-Okhotsk Ocean and formation of an orocline: magmatic migration based on a large archive of age data     

Tao Wang  Ying Tong  Wenjiao Xiao  Lei Guo  Brian F Windley  Tatiana Donskaya  Shan Li  Narantsetseg Tserendash  Jianjun Zhang 《国家科学评论(英文版)》2022,9(5)

Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly. The eastern Central Asian Orogenic Belt, where the Mongol-Okhotsk orocline is situated, is one of the world''s largest magmatic provinces. Using a large data set of U-Pb zircon ages, we updated the timing of many published igneous rocks, which allowed us to recognize tightly ‘folded’ linear Carboniferous-Jurassic magmatic belts that wrap around the Mongol-Okhotsk suture and their migrations both sutureward and suture-parallel. The new successive magmatic belts reveal a rollback, scissor-like (or zipper-like) closure of the Mongol-Okhotsk Ocean that was fundamentally controlled by coeval subduction rollback and rotation of the Siberian and Mongolian-Erguna blocks. This study also demonstrates the complex mechanisms and processes of the closure of an ocean with irregular margins and the formation of a consequent orocline.  相似文献   

Playing for position: education policy,Physical Education and nationalism in Wales     

John Evans  Brian Davies    Dawn Penney 《教育政策杂志》2013,28(4):285-302

This paper explores the connections between Physical Education, nationalism and citizenship in England and Wales focusing upon how education legislation, in particular the National Curriculum (NC) and Local Management of Schools (LMS), are implicated in the cultural production of ideational differences between and amongst the peoples of England and Wales. As our previous research has centred heavily on the making and implementation of education policy and PE in England, we take this opportunity to adjust our gaze and focus squarely on issues of cultural production in Wales, particularly relationships between the construction of images of Welsh identity and education policy and practice relating to PE and sport in schools. The analysis highlights that tendencies towards a narrow, conservative, cultural restoration are as evident in Wales as they are in England and obstruct progression towards more innovative and progressive ideals.  相似文献   

Authority in the Valley: TVA in Wild River and the Popular Media, 1930–1940     

Brian Black 《Journal of American culture (Malden, Mass. : 2003)》1995,18(2):1-14

  相似文献   

Primary—Secondary Liaison in English     

John Bennett  Brian Cadman  Peter Davies  David Michie 《English in Education》1983,17(1):56-64

  相似文献   

How much effort is needed to keep up with the literature relevant for primary care?     

Brian S Alper  Jason A Hand  Susan G Elliott  Scott Kinkade  Michael J Hauan  Daniel K Onion  Bernard M Sklar 《Journal of the Medical Library Association》2004,92(4):429-437

OBJECTIVES: Medicine must keep current with the research literature, and keeping current requires continuously updating the clinical knowledge base (i.e., references that provide answers to clinical questions). The authors estimated the volume of medical literature potentially relevant to primary care published in a month and the time required for physicians trained in medical epidemiology to evaluate it for updating a clinical knowledge base. METHODS: We included journals listed in five primary care journal review services (ACP Journal Club, DynaMed, Evidence-Based Practice, Journal Watch, and QuickScan Reviews). Finding little overlap, we added the 2001 "Brandon/Hill Selected List of Print Books and Journals for the Small Medical Library." We counted articles (including letters, editorials, and other commentaries) published in March 2002, using bibliographic software where possible and hand counting when necessary. For journals not published in March 2002, we reviewed the nearest issue. Five primary care physicians independently evaluated fifty randomly selected articles and timed the process. RESULTS: The combined list contained 341 currently active journals with 8,265 articles. Adjusting for publication frequency, we estimate 7,287 articles are published monthly in this set of journals. Physicians trained in epidemiology would take an estimated 627.5 hours per month to evaluate these articles. CONCLUSIONS: To provide practicing clinicians with the best current evidence, more comprehensive and systematic literature surveillance efforts are needed.  相似文献