Related Experiment Videos
[Effect of obesity on cardiovascular performance]
Zeitschrift Fur Die Gesamte Innere Medizin Und Ihre Grenzgebiete
|March 1, 1983
Summary
Obese individuals exhibit distinct systolic time intervals and lower cardiac output compared to normal-weight individuals. However, cardiovascular regulation normalizes in obese subjects who achieve moderate exercise capacity.
Area of Science:
- Cardiology
- Physiology
- Exercise Science
Context:
- Investigating cardiovascular function in obesity is crucial for understanding associated health risks.
- Systolic time intervals and cardiac output are key indicators of heart performance.
- Load ergometry assesses exercise capacity and cardiovascular response.
Purpose:
- To compare cardiovascular parameters, specifically systolic time intervals and cardiac output, between normal-weight and obese individuals.
- To evaluate the impact of exercise capacity on cardiovascular regulation in obese subjects.
Summary:
- This study measured systolic time intervals (time of tension, left-ventricular ejection time) and cardiac output in 55 normal-weight and 76 obese individuals.
- While the index of tension showed no significant difference, obese individuals displayed altered time of tension and ejection time, and lower cardiac output.
- Obese individuals with exercise capacity below 75 Watt had an average index of tension of 1.04; only half reached 100 Watt.
- Cardiovascular regulation (heart rate and blood pressure) did not differ between obese individuals (n=32) achieving >75 Watt and normal-weight controls.
Impact:
- Findings highlight specific cardiovascular adaptations in obesity, independent of blood pressure changes.
- Identifies a threshold of exercise capacity (>75 Watt) where cardiovascular regulation in obese individuals approaches that of normal-weight individuals.
- Provides insights into the physiological differences that may contribute to cardiovascular disease risk in obesity.