EXERCISE AND SPORTS PHYSIOLOGY
CARDIOVASCULARRESPONSE TO EXERCISE
Presented by: AVIK BASU
The following aspects of cardiovascular system are influenced by exercise:
1. Blood Flow Distribution
2. Heart Rate
3. Cardiac Output4. Blood Pressure
REGULATION OF
BLOOD FLOW
What is auto-regulation?
It is a manifestation of local blood flow regulation in a particular organ
system at tissue level
Metabolic
Myogenic
Metabolic Theory of Auto-regulation
Pre-capillary Sphincters Closed
Pre-capillary Sphincters Opened
During Exercise…
Blood Flow Redistribution during Exercise
GOALS OF BLOOD FLOW REDISTRIBUTION
• Satisfy the altered nutritional requirement
• Keep the core body temperature at a constant
• Maintain perfusion of the essential organs
REGULATION OF
HEART RATE
DURING EXERCISE...
Catecholamine release
Stimulation of B1 receptors of heart
Positive chronotropy
AT REST DURING EXERCISE
REGULATION OF
CARDIAC OUTPUT
FACTORS RESPONSIBLE FOR INCREASED CARDIAC
OUTPUT IN EXERCISE
• Increased venous return to the heart
• Positive inotropy
• Positive chronotropy
GRAPHICAL REPRESENTATION OF THE RELATIONSHIP BETWEEN CARDIAC OUTPUT,
VENOUS RETURN AND INOTROPY AND THEIR CHANGES DURING EXERCISE
REGULATION OF
BLOOD PRESSURE
EFFECT ON SYSTOLIC BLOOD PRESSURE
Catecholamine release during exercise
Positive chronotropy and inotropy
Rise in Systolic Blood Pressure
EFFECT ON DIASTOLIC BLOOD PRESSURE
In Aerobic Exercise…
DBP is decreased
In Anaerobic Exercise…
DBP is increased
THANK YOU!
