Comparison of Cardiac Dimensions in Resistance Trained Young and Older Men
Lauschke, Catherine Ann
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https://hdl.handle.net/2142/72495
Description
Title
Comparison of Cardiac Dimensions in Resistance Trained Young and Older Men
Author(s)
Lauschke, Catherine Ann
Issue Date
1993
Doctoral Committee Chair(s)
Misner, J.E.,
Department of Study
Kinesiology
Discipline
Kinesiology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Animal Physiology
Education, Physical
Abstract
The purpose of this study was to determine the combined effect of age and resistance training on the cardiac structure of healthy young and older men. Thirty young men, ages 20 to 34, and 14 older men, ages 39 to 58, were included in the study. Twenty-two of the subjects were chronically resistance trained, while the remaining 22 were control subjects who did not participate in any type of regular physical activity. Resting cardiovascular measurements including heart rate, systolic and diastolic blood pressures, and a 12-lead resting electrocardiogram were completed on all subjects.
Two-dimensional echocardiography was used to measure left ventricular internal diameter at end-diastole (LVIDd) and end-systole (LVIDs), left ventricular posterior wall thickness (LVPWTd), interventricular septal wall thickness (IVSTd), and left atrial diameter at end-systole (LADs). Calculated cardiovascular parameters included: left ventricular mass (LVM), stroke volume (SV), cardiac output (Q), ejection fraction (EF), and fractional shortening (FS).
Data collected showed that the young weight lifters (YWL) had significantly greater LVM than the young controls (YC) due to greater wall thicknesses with slight increases in LVIDd. There was no significant difference in LVM between the two older groups. LVM was highly correlated to lean body mass (LBM) in all subjects. The LADs was significantly affected by age with the older subjects having greater diameters than the younger subjects. The SV of the YWL was greater than that of the YC, whereas the two older groups had similar SV's. There was no difference in EF and FS when all groups were compared.
These data suggest that resistance training is associated with greater LVM, but that age and weight lifting did not impose an additive effect on cardiac structure. In addition, the cardiac hypertrophy experienced by the YWL appears to be related to increases in LBM.
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