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Left ventricular contractility and function at peak aerobic and anaerobic exercises
M Sagiv1, D Ben-Sira, E Goldhammer
1Sports Medicine & Rehabilitation Division, The Zinman College of Physical Education and Sport Sciences, Wingate, Israel. sagiv@wincol.macam98.ac.il
Medicine and Science in Sports and Exercise
|July 27, 2000
Summary
Left ventricular function differs significantly between peak aerobic and anaerobic exercise in young, trained individuals. Anaerobic exercise causes greater changes, suggesting caution during such intense physical exertion.
Area of Science:
- Cardiology
- Exercise Physiology
- Sports Medicine
Background:
- Understanding the cardiovascular response to different exercise types is crucial for athletes and clinicians.
- Left ventricular function is a key indicator of cardiac health during physical stress.
Purpose of the Study:
- To compare left ventricular function and contractility during peak aerobic exercise versus peak all-out anaerobic effort.
- To evaluate the impact of different exercise intensities and types on cardiac performance in young, healthy, trained subjects.
Main Methods:
- Utilized two-dimensional M-mode echocardiography to assess cardiac parameters.
- Studied 22 young, healthy, trained subjects performing incremental aerobic and all-out anaerobic exercises on a cycle ergometer.
Main Results:
- Significant differences observed in peak cardiac output, left ventricular pressure-volume ratio, end-systolic volume, and ejection fraction between aerobic and anaerobic efforts.
- Total peripheral resistance (TPR) was significantly higher during anaerobic exercise.
- No electrocardiographic abnormalities were reported in any subject.
Conclusions:
- Left ventricular function during peak anaerobic effort markedly differs from that during peak aerobic exercise.
- Differences are likely attributed to varying after-load responses between exercise modes.
- Suggests performing anaerobic-type exercise with caution in healthy young individuals.