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Left ventricular hypertrophy in athletes: an exercise-echocardiographic study
Medicine and Science in Sports and Exercise
|December 1, 1985
Summary
Different training types lead to distinct heart adaptations. Static training increases heart wall thickness, while dynamic training increases heart chamber volume, with these changes persisting during exercise.
Area of Science:
- Cardiovascular Physiology
- Sports Cardiology
- Exercise Science
Background:
- Athletes exhibit cardiac adaptations distinct from sedentary individuals.
- Understanding these adaptations is crucial for interpreting cardiac health in athletes.
Purpose of the Study:
- To compare left ventricular (LV) dimensions in distance runners, wrestlers, and sedentary controls.
- To investigate how these LV dimensions change during graded exercise.
Main Methods:
- M-mode echocardiography was used to measure LV dimensions.
- Measurements were taken at rest and during 12 minutes of semi-supine bicycle ergometer exercise.
- Three groups were studied: 10 distance runners, 10 wrestlers, and 10 sedentary controls.
Main Results:
- Both runners and wrestlers showed increased LV mass compared to controls at rest.
- Wrestlers exhibited increased LV wall thickness, while runners showed increased LV end-diastolic dimension.
- These distinct patterns of LV adaptation persisted during exercise.
Conclusions:
- Different athletic disciplines induce specific patterns of left ventricular hypertrophy (LVH).
- Static training is associated with increased wall thickness, while dynamic training is linked to increased LV volume.
- These exercise-induced cardiac adaptations are maintained during moderate exercise and have functional significance.