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Cardio-vascular changes during graded exercise.
D Venkatesh1, K P Putturaya, C A Sreekantha
1Department of Physiology, Bangalore Medical College.
Indian Journal of Physiology and Pharmacology
|October 1, 1988
Summary
Untrained male students showed significant heart rate and systolic blood pressure increases during graded exercise. Diastolic blood pressure dropped during the second session, possibly due to epinephrine release.
Area of Science:
- Cardiovascular Physiology
- Exercise Science
Background:
- Understanding cardiovascular adaptation to exercise is crucial for public health.
- Untrained individuals may exhibit distinct physiological responses compared to trained athletes.
Purpose of the Study:
- To investigate the cardiovascular system's adaptation to graded exercise in untrained male medical students.
- To analyze changes in heart rate and blood pressure during and after exercise.
Main Methods:
- Subjects performed two 5-minute exercise sessions on a bicycle ergometer at different grades.
- A 15-minute rest period was observed between exercise sessions.
- Heart rate and blood pressure were monitored throughout the study.
Main Results:
- A statistically significant increase in heart rate was observed during both exercise sessions, persisting post-exercise.
- Systolic blood pressure significantly increased during both exercise sessions.
- Diastolic blood pressure showed a significant decrease during the second exercise session.
Conclusions:
- Cardiovascular responses to graded exercise in untrained males include elevated heart rate and systolic pressure, with a potential drop in diastolic pressure.
- These physiological changes may be linked to the sustained release of epinephrine.
- Further research could explore long-term adaptations and interventions for untrained populations.