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To characterize the physical demands associated with on-the-job use of current firefighting equipment and the performance of essential firefighting operations, an initial task analysis of all firefighting operations was followed by an in-depth physical and physiological characterization of those tasks deemed to be physically demanding. The most commonly(More)
The range of exercise intensities that elicit high fat oxidation rates (FOR) in youth and the influence of pubertal status on peak FOR are unknown. In a longitudinal design, we compared FOR over a range of exercise intensities in a small cohort of developing prepubertal male subjects. Five boys all at Tanner stage 1 (ages 11-12 yr) and nine men (ages 20-26(More)
BACKGROUND Understanding sudden cardiac death in the young may inform prevention strategies. OBJECTIVE To determine the scope and nature of sudden death in a geographically defined population. METHODS We performed a retrospective population-based cohort study in Ontario, Canada, of all sudden cardiac death cases involving persons aged 2-40 years(More)
To qualify as a Bona Fide Occupational Requirement (BFOR), a Job Specific Physical Fitness Protocol (JSPFP) must conform to the requirements delineated in the 1999 Supreme Court of Canada's Meiorin Decision and the 2004 amendment to the Criminal Code of Canada. It is also highly recommended that the development of BFORs follow the template created in the(More)
Athletes (n = 345) invited to the annual combine conducted by the National Hockey League (NHL) prior to the entry draft were administered tests to measure upper body strength, lower body power, aerobic and anaerobic energy systems, and body composition. Their common variance was extracted using factor analysis from which an overall composite index was(More)
Recently, we proposed that the higher stroke volume (SV) and cardiac output (Q) of endurance-trained (ETR) versus untrained (UTR) individuals are attributable primarily to the enhanced diastolic filling of ETR consequent to a larger blood volume (BV). To test this hypothesis, we examined the effects of manipulating BV on the cardiac function of six ETR and(More)
PURPOSE Cardiac rehabilitation (CR) is significantly underutilized. However, physician endorsement promotes greater patient utilization. This study examined perceptions of provider endorsement by patients (1) of sociodemographic groups who are often less represented in CR and by clinical indication and (2) by type of healthcare provider and place of(More)
OBJECTIVE To determine whether plasma volume expansion (PVexp) in elite endurance-trained (ET) cyclists, who already possess both a high blood volume (BV) and a high VO2max, leads to further enhancements in their cardiac function, VO2max, and endurance performance (time to exhaustion at 95% VO2max). METHODS Nine male ET cyclists (V02max = 68.9 +/- 0.6(More)
Recent feedback from physical activity (PA) participants, fitness professionals, and physicians has indicated that there are limitations to the utility and effectiveness of the existing PAR-Q and PARmed-X screening tools for PA participation. The aim of this study was to have authorities in exercise and chronic disease management to work with an expert(More)
Alterations in [Hb], which are mediated through changes in arterial oxygen content, and alterations in BV, which are mediated through changes in cardiac output (Q), have a significant effect on both VO2max and aerobic performance. If BV is held constant, a decrease in [Hb] (anaemia) causes a decrease in VO2max and aerobic performance, while an increase in(More)