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Cardiac stroke volume: effects of athletic training
The Journal of Sports Medicine
|January 1, 1975
Summary
Achieving a large cardiac stroke volume for enhanced oxygen transport involves increasing systolic emptying with short-term training or diastolic heart volume with years of endurance training. Genetic factors also play a role in stroke volume capacity.
Area of Science:
- Cardiovascular Physiology
- Exercise Science
- Sports Medicine
Background:
- High-capacity oxygen transport is crucial for athletic performance.
- A large cardiac stroke volume is essential for efficient oxygen delivery.
- Understanding factors influencing stroke volume is key for optimizing training.
Purpose of the Study:
- To explore the physiological adaptations leading to increased cardiac stroke volume.
- To investigate the time course and requirements for developing a high stroke volume.
- To examine potential training strategies for maximizing stroke volume.
Main Methods:
- Analysis of physiological responses to different training durations and intensities.
- Consideration of cardiac structural changes (systolic emptying, diastolic volume).
- Review of factors including training period, age, and genetics.
Main Results:
- Short-term training (1-3 months) may increase systolic emptying.
- Significant increases in stroke volume require enhanced diastolic heart volume, developed over years of endurance training.
- Training during puberty and genetic predisposition may influence stroke volume capacity.
Conclusions:
- Developing a high stroke volume is a long-term adaptation, primarily through increased diastolic heart volume in elite endurance athletes.
- Optimal training methods for maximizing stroke volume remain unclear, though interval training with supine recovery shows potential.
- Further research is needed to determine the practical value of specific training protocols for enhancing stroke volume.
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