Cardiac structure and function in children has been shown to be influenced by athletic training.1 In adult athletes, functional differences exist between those undergoing dynamic vs isometric training.2-5 Childhood endurance-trained athletes have been studied, but to date, few studies have evaluated the effects of isometric training on children's hearts.6 The purpose of this Doppler echocardiography study was to assess the effects of such training in a group of elite national championship high school wrestlers, comparing morphologic and functional cardiac alterations with those of nonathletic controls.
PATIENTS AND METHODS
Seventeen high school wrestlers (Table 1) were randomly selected from the finalists (first through sixth place) at the National Junior Wrestling Championships held at the University of Northern Iowa, Cedar Falls, July 15 to 21, 1985. All tournament participants were finalists in their particular weight classes from their own state or region. Subjects participated in GrecoRoman and/or freestyle