Differences in Cardiac Parameters Among Elite Rowers and Subelite Rowers
ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
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There is significant individual variability in the cardiac adaptation that occurs in response to exercise training. Factors associated with this variability remain incompletely understood. To date, the relationship between the competitive level at which athletes participate and their underlying cardiac parameters has not been explored. Purpose The purpose of this study was to determine whether parameters of cardiac structure and function differ significantly among elite competitive rowers ER, subelite competitive rowers SR, and sedentary controls C. Methods Cardiac parameters were assessed in ER n 20, SR n 20, and C n 20 using two-dimensional. tissue Doppler, and speckled-tracking echocardiography. Results Physiologic cardiac remodeling was present in both ER and SR as evidenced by the significant differences in the majority of structural and functional parameters in both rower groups when compared with C. When compared with SR, ER were found to have greater left ventricular LV end-diastolic volume 76 6 vs 71 8 mL-mexp-2, P 0.02, LV mass 150 11 vs 134 16 g.m-2, P 0.002. and right ventricular RV end-diastolic chamber dimensions 15.6 T 0.9 vs 13.9 - 1.5 sq cm2mexp -2, P 0.001.
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