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   

Web-Based Organizational Tools for Professional Librarians     

Nicole A. Cooke 《Public Services Quarterly》2013,9(2):137-150

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Rebuilding america's primary wealth-the soil     

Morris Llewellyn Cooke 《Journal of The Franklin Institute》1943,236(4):363-372

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The chemical theory of the voltaic battery     

J.P. Cooke 《Journal of The Franklin Institute》1872,93(2):131-137

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The right to know the need to act     

Eileen D. Cooke  Director 《Government Information Quarterly》1987,4(4)

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Gut microbiota and obesity:Impact of antibiotics and prebiotics and potential for musculoskeletal health     

Teja Klancic  Raylene A.Reimer 《运动与健康科学(英文)》2020,9(2):110-118,197

Obesity is a complex disease with multiple contributing factors.One of the most intensely studied factors during the past decade has been the gut microbiota,which is the community of all microbes in the intestinal tract.The gut microbiota,via energy extraction,inflammation,and other actions,is now recognized as an important player in the pathogenesis of obesity.Dysbiosis,or an imbalance in the microbial community,can initiate a cascade of metabolic disturbances in the host.Early life is a particularly important period for the development of the gut microbiota,and perturbations such as with antibiotic exposure can have long-lasting consequences for host health.In early life and throughout the life span,diet is one of the most important factors that shape the gut microbiota.Although diets high in fat and sugar have been shown to contribute to dysbiosis and disease,dietary fiber is recognized as an important fermentative fuel for the gut microbiota and results in the production of short-chain fatty acids that can act as signaling molecules in the host.One particular type of fiber,prebiotic fiber,contributes to changes in the gut microbiota,the most notable of which is an increase in the abundance of Bifidobacterium.This review highlights our current understanding of the role of gut microbiota in obesity development and the ways in which manipulating the microbiota through dietary means,specifically prebiotics,could contribute to improved health in the host,including musculo skeletal health.  相似文献   

Impact of age on host responses to diet-induced obesity:Development of joint damage and metabolic set points     

Kelsey H.Collins  Graham Z.MacDonald  David A.Hart  Ruth A.Seerattan  Jaqueline L.Rios  Raylene A.Reimer  Walter Herzog 《运动与健康科学(英文)》2020,9(2):132-139,197

Background:Osteoarthritis is one of the leading causes of pain and disability worldwide,and a large percentage of patients with osteoarthritis are individuals who are also obese.In recent years,a series of animal models have demonstrated that obesity-inducing diets can result in synovial joint damage(both with and without the superimposition of trauma),which may be related to changes in percentage of body fat and a series of low-level systemic inflammatory mediators.Of note,there is a disparity between whether the dietary challenges commence at weaning,representing a weanling onset,or at skeletal maturity,representing an adult onset of obesity.We wished to evaluate the effect ofthe dietary exposure time and the age at which animals are exposed to a high-fat and high-sucrose(HFS) diet to determine whether these factors may result in disparate outcomes,as there is evidence suggesting that these factors result in differential metabolic disturbances.Based on dietary exposure time,we hypothesized that rats fed an HFS diet for 14 weeks from weaning(HFS Weanling) would demonstrate an increase in knee joint damage scores,whereas rats exposed to the HFS diet for 4 weeks,starting at 12 weeks of age(HFS Adult) and rats exposed to a standard chow diet(Chow)would not display an increase in knee joint damage scores.Methods:Male Sprague-Dawley rats were fed either an HFS diet for 14 weeks from weaning(HFS Weanling) or an HFS diet for 4 weeks,starting at 12 weeks of age(HFS Adult).At sacrifice,joints were scored using the modified Mankin Criteria,and serum was analyzed for a defined subset of inflammatory markers(Interleukin-6,leptin,monocyte chemoattractant protein-1,and tumor necrosis factorα).Results:When the HFS Weanling and HFS Adult groups were compared,both groups had a similar percent of body fat,although the HFS Weanling group had a significantly greater body mass than the HFS Adult group.The HFS Weanling and HFS Adult animals had a significant increase in body mass and percentage of body fat when compared to the Chow group.Although knee joint damage scores were low in all 3 groups,we found,contrary to our hypothesis,that the HFS Adult group had statistically significant greater knee joint damage scores than the Chow and HFS Weanling groups.Furthermore,we observed that the HFS Weanling group did not have significant differences in knee joint damage scores relative to the Chow group.Conclusion:These findings indicate that the HFS Weanling animals were better able to cope with the dietary challenge of an HFS diet than the HFS Adult group.Interestingly,when assessing various serum proinflammatory markers,no significant differences were detected between the HTS Adult and HFS Weanling groups.Although details regarding the mechanisms underlying an increase in knee joint damage scores in the HFS Adult group remain to be elucidated,these findings indicate that dietary exposure time maybe less important than the age at which an HFS diet is introduced.Moreover,increases in serum proinflammatory mediators do not appear to be directly linked to knee joint damage scores in the HFS Weanling group animals but may be partially responsible for the observed knee joint damage in the adults over the very short time of exposure to the HFS diet.  相似文献   

From Vision to Change: Educational Initiatives and Research at the Intersection of Physics and Biology     

Eric Brewe  Nancy J. Pelaez  Todd J. Cooke 《CBE life sciences education》2013,12(2):117-119

In this editorial we link the articles published in this Special Issue with the framework from Vision and Change and summarize findings from the editorial process of assembling the Special Issue.The authors of Vision and Change (American Association for the Advancement of Science [AAAS], 2011 ) issued the following call to action to biologists, physicists, chemists, and mathematicians:

To ensure that all students graduate with a basic level of scientific literacy and meet the challenges raised in Bio 2010: Transforming Undergraduate Education for Future Research Biologists (2003), Scientific Foundations for Future Physicians: Report of the AAMC-HHMI Committee (2009), A New Biology for the 21st Century (2009), and similar reports, biologists, physicists, chemists, and mathematicians need to look thoughtfully at ways they can introduce interdisciplinary approaches into their gateway courses. (AAAS, 2011 , p 54)

The articles that comprise this special issue of CBE—Life Sciences Education (LSE) take important steps toward responding to this call by describing teaching and learning at the intersection of biology and physics. Broadly defined, the work aims to encourage the development of genuine interdisciplinary understanding, or “the capacity to integrate knowledge and modes of thinking in two or more disciplines or established areas of expertise to produce a cognitive advancement … in ways that would have been impossible or unlikely through single disciplinary means” (Boix Mansilla and Duraisingh, 2007 , p. 219). Indeed, many of the most exciting recent breakthroughs in the life sciences have occurred at the intersection of these established disciplines. Physical laws help to predict, describe, and explain biological phenomena occurring at molecular to ecosystem levels, and the development of new physical tools helps to visualize these phenomena in new and informative ways. Thus, the Vision and Change report stresses the urgency for undergraduate biology and physics educators to develop, assess, and revise content materials, pedagogical strategies, and epistemological perspectives for encouraging student learning in interdisciplinary biology and physics classes.We received more than 50 abstracts in response to the call for this special issue, and we are pleased to publish 10 Articles, four Essays, and eight Features reflecting the state of educational transformation at the intersection of biology and physics. Several articles describe integration of physics into biology curriculum or biology into physics curriculum that goes beyond simple provision of examples from the respective disciplines (e.g., Batiza et al., Christensen et al., Svoboda Gouvea et al., O’Shea et al., Thompson et al., Breckler et al.). A number of articles address cross-cutting themes, such as problem solving (e.g., Hoskinson et al.) and energy (e.g., Cooper and Klymkowsky, Svoboda Gouvea et al.), the application of mathematical laws to biological phenomena (e.g., Redish and Cooke), epistemology (e.g., Watkins and Elby), and assessment as a powerful tool for driving curriculum change, in this case the integration of physics and biological thinking (e.g., Svoboda Gouvea et al., Momsen et al., Thompson et al.). Other articles reflect research crossing disciplinary boundaries to introduce research approaches (e.g., Watkins and Elby, Momsen et al.) or innovative curriculum models (e.g., Manthey and Brewe, Donovan et al., Thompson et al.) to help students develop reasoning strategies that move beyond traditional disciplinary boundaries. The Hillborn and Friedlander essay highlights potential impacts of cross-disciplinary collaboration in education on the revised Medical College Admission Test.We were pleased by the number of articles coauthored by physicists and biologists working in teams to examine and recommend new directions for the future of biology education. These teams brought a richness and depth of knowledge in both disciplines that made it possible to move instruction and research forward at the intersection of the disciplines. Together, these articles start to provide the evidence base for responding to the calls for interdisciplinary teaching and learning. Further, they provide opportunities to compare and contrast education and epistemologies in biology and physics, allowing for more informed integration of knowledge from these disciplines.  相似文献   

Parable of Frills and Fads     

Robert Locke Cooke 《Clearing house (Menasha, Wis.)》2013,86(2):111-112

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The inextricable link between sport and the press in the Victorian era: the example of the ‘Sentinel Cup’     

Martyn Dean Cooke 《Sport in History》2019,39(1):1-23

During the Victorian era sport underwent what has been described by academics as a ‘revolution’. What began the nineteenth century as largely informal, recreational pastimes with few written rules and a small commercial fringe was transformed into a codified, commercialised, mass-spectator entertainment industry. During this period an inextricable link developed between sport and the press and both became mutually beneficial; sport provided a continuous conveyor belt of content for journalists to report whilst newspapers provided enhanced publicity and exposure in return. However, the press were not merely commentators and observers of sport and several publications took a more central role in its development and organisation. This is exemplified by the Staffordshire Sentinel, a regional newspaper that circulated across North Staffordshire and South Cheshire, which established the self-titled ‘Sentinel Cup’ in 1892. The competition was officially created to develop junior association football in the region, although key stakeholders also had other alternative motives, and it has been contested for 125 consecutive years, making it the longest continuous football cup in Britain. This paper uses the ‘Sentinel Cup’ as an exemplar of how the press became increasingly involved in sport during the Victorian era and explores the competition’s inauguration.  相似文献