analysis, it was observed that, in many cases, urinary LH concentrations close to or below the threshold of 1.0 IU/L were related to low SG values (diluted samples, SG < 1.005). Based on anecdotal evidence, hyperhydration is being used by a number of athletes as a masking method, since urine dilution is
Ioanna Athanasiadou, Sven Christian Voss, Wesal El Saftawy, Hind Al-Jaber, Najib Dbes, Sameera Al-Yazedi, Waseem Samsam, Vidya Mohamed-Ali, Mohammed Alsayrafi, Georgia Valsami and Costas Georgakopoulos
Douglas M. Kleiner
Erik E. Swartz
Column-editor : Michael G. Dolan
Mark B. Andersen
John Strickland and Grant Bevill
review of biomechanics literature demonstrates that only the protective equipment available to batters and catchers have been evaluated, 5 – 9 whereas, to the authors’ knowledge, no tests have been performed for the facemasks available for fielders. Data from studies examining catcher’s masks are
Jennifer L. Huberty, Jeni L. Matthews, Meynard Toledo, Lindsay Smith, Catherine L. Jarrett, Benjamin Duncan and Matthew P. Buman
measured twice using an electronic stadiometer and weighing scale (Seca 274, Medical Measuring Systems, Chino, CA). Lab personnel discussed what could be expected from the general protocol, and how to navigate certain parts of the yoga sequence while wearing the measurement tools (mask, backpack, and
Blake D. McLean, Cloe Cummins, Greta Conlan, Grant Duthie and Aaron J. Coutts
% during straight line running), which could mask any small load increases in the anteroposterior and mediolateral axes that may occur during tackling drills. It has previously been shown that 3D accelerometer loads are strongly influenced by total distance traveled during locomotor activities (due to the
“Americanization” is a much more useful term than “globalization” in the Canadian context. The specific practices of commercial sport that have eroded local autonomy began as explicitly American practices, and state-subsidized American-based cartels flood the Canadian market with American-focused spectacles, images, and souvenirs. But the term does oversimplify the complexity of social determinations and masks the increasing role the Canadian bourgeoisie plays in continentalist sports. “American capitalist hegemony” is therefore preferable. The long debate over Americanization in Canada has also focused on the appropriate public policy response. Traditionally, Canadians have turned to the state to protect cultural expression from the inroads of American production, but that becomes increasingly difficult under neoconservative renovation and the regional trading bloc created by the 1989 U.S.-Canada Free Trade Agreement. The popular movements will need new means to protect and strengthen the presentation and distribution of their own sporting culture.
Matthieu M. de Wit, Rich S.W. Masters and John van der Kamp
Based upon evidence that vision for action has quicker access to visual information than vision for perception, we hypothesized that the two systems may have differentiated visual thresholds. There is also evidence that, unlike vision for perception, vision for action is insensitive to cognitive dual-task interference. Using visual masking, we determined the visual thresholds of 15 participants in a perception task, an action task and an action plus concurrent cognitive secondary task. There was no difference in threshold between the perception task and the action task, but the action plus concurrent secondary task was accompanied by a greater visual threshold than both the perception task and the action task alone, indicating dual-task interference. The action task was thus most likely informed by vision for perception. The implications of these results are reviewed in the context of recent discussions of the two visual systems model.