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Ross C. Brownson, Diana C. Parra, Marsela Dauti, Jenine K. Harris, Pedro C. Hallal, Christine Hoehner, Deborah Carvalho Malta, Rodrigo S. Reis, Luiz Roberto Ramos, Isabela C. Ribeiro, Jesus Soares and Michael Pratt


Physical inactivity is a significant public health problem in Brazil that may be addressed by partnerships and networks. In conjunction with Project GUIA (Guide for Useful Interventions for Physical Activity in Brazil and Latin America), the aim of this study was to conduct a social network analysis of physical activity in Brazil.


An online survey was completed by 28 of 35 organizations contacted from December 2008 through March 2009. Network analytic methods examined measures of collaboration, importance, leadership, and attributes of the respondent and organization.


Leadership nominations for organizations studied ranged from 0 to 23. Positive predictors of collaboration included: south region, GUIA membership, years working in physical activity, and research, education, and promotion/practice areas of physical activity. The most frequently reported barrier to collaboration was bureaucracy.


Social network analysis identified factors that are likely to improve collaboration among organizations in Brazil.

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Sarah Edney, Tim Olds, Jillian Ryan, Ronald Plotnikoff, Corneel Vandelanotte, Rachel Curtis and Carol Maher

, participants were required to assemble into a team of minimum 3 to maximum 8 Facebook friends who also met the eligibility criteria and who were willing to join the study. The first participant from each team to join the study was designated as the “captain” of the team, and this captain was primarily

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Mark L. Shik

The population of reticulospinal neurons of the hindbrain receives input from several brain regions and activates spinal interneurons that assemble stepping. Axons of these reticulospinal neurons descend in the ventral part of the lateral funiculus. Axons of certain spinal neurons form the “stepping strip” in the dorsal part of the lateral funiculus. Stimulation of this strip elicits stepping via particular spinal neurons that send their axons to the ventral part of the lateral funiculus. Neurons of these two types form the propriospinal system capable of activating spinal interneurons that assemble stepping.

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Julien Louis, Fabrice Vercruyssen, Olivier Dupuy and Thierry Bernard

Master athletes are often considered exemplars of successful aging, thanks to their capacity to maintain a high sports performance during their entire life. A high training capacity, regular participation in sporting competitions, and delayed alterations in body composition and physiological capacities have been listed among the main factors contributing to impressive master athletes’ performances. However, there is a paucity of data on the metabolism and dietary habits of master athletes, and the question of whether they need to adapt their nutrition to the aging process remains open. Herein, the authors presented a contemporary overview of the metabolic challenges associated with aging, including the risk of low energy availability, anabolic resistance, and periods of metabolic crisis due to forced immobilization. After assembling scientific evidence to show that master athletes must adapt their dietary intake, the authors proposed a summary of nutritional recommendations for master athletes and suggested the next stage of research.

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Ronald J. Maughan

In May 2017, the Medical and Scientific Commission of the International Olympic Committee assembled a panel of experts at their offices in Lausanne, Switzerland, to discuss the role of dietary supplements in the life of the high-performance athlete. Participants were selected because of their

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P.A. Hancock

What I seek to achieve in this article is an exploration of how some of the distilled and assembled principles of behavior can be applied to human goals, aspirations, and performance writ large. I look to do this through an analysis of various areas of application, although the primary framework upon which I erect this discourse is my own autobiographical progress in science. My grounding in formal research was derived from motor learning and control and it then developed into an examination of all human interaction with technical systems under the general title human factors/ergonomics. In showing an indissoluble link between the foundations of motor control and the technological mediation of human factors and ergonomics, I hope to inform and inspire their consideration of the greater aspirations for all of kinesiological science. In terms of specifics, I discuss the work my laboratory has produced over a number of decades on issues such as driving, fight, and other human-augmenting technologies, with a special focus on performance under stress and high workload conditions. To conclude, I discuss, dispute, and finally dispense with the proposition that science and purpose (proximal understanding and ultimate meaning) can be dissociated. I hope to demonstrate why the foregoing principles and their ubiquitous application mean that science in general bears a heavy, if unacknowledged burden with respect to the current failings, especially of Western society.

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Peter T. Katzmarzyk, Kara D. Denstel, Kim Beals, Jordan Carlson, Scott E. Crouter, Thomas L. McKenzie, Russell R. Pate, Susan B. Sisson, Amanda E. Staiano, Heidi Stanish, Dianne S. Ward, Melicia Whitt-Glover and Carly Wright

Advisory Committee was assembled under the auspices of the National Physical Activity Plan Alliance ( The Committee reviewed the evidence and assigned grades to 10 indicators using data from nationally representative studies and surveys. The indicators included: 1) overall

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Population-Based Sample in Recife, Brazil Jesus Soares * Eduardo J. Simões * Luiz Roberto Ramos * Michael Pratt * Ross C. Brownson * 1 2010 7 s2 S229 S241 10.1123/jpah.7.s2.s229 Assembling the Puzzle for Promoting Physical Activity in Brazil: A Social Network Analysis Ross C. Brownson * Diana C

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Ricardo Pires, Thays Falcari, Alexandre B. Campo, Bárbara C. Pulcineli, Joseph Hamill and Ulysses Fernandes Ervilha

criterion was adopted because the first coefficients in the DWT correspond to the complete group of coefficients within resolution levels. For each of these sequences of coefficients, the corresponding vectors for training an SVM were assembled, and because at any time we always compared 2 classes (rearfoot

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Julia Rudecki, Katie Weatherson and Guy Faulkner

environment. All participants were provided with 3 information sheets: (1) instructions on how to assemble the desk, (2) how to use the desk to break up sitting time, and (3) information about the health benefits of reducing sitting time. There was no control group in this study. The institutional research