Heart Rate After Exercise
What happened to the R-R interval and heart rate after exercise?
After exercise the R-R interval increased steadily from 0.48 to 0.68 seconds, while the heart rate BPM decreased steadily from 123 to 76; both trending back towards the resting values.
What happened to the T-P interval during exercise? Outline what this means for ventricular filling time.
During exercise there was a significant drop in the T-P interval which then steadily increased when exercise was completed. The T-P interval represents a period between ventricular repolarization (T) and atrial depolarization (P) and shows the period when the ventricles are relaxed and heart is electrically silent. During this period of relaxation the AV valves open and blood is able to flow …show more content…
During exercise the heart rate and stroke volume are both higher, however the mean pulse amplitude at a finger tip, will be lower, due to vasoconstriction and blood being directed towards active skeletal muscle instead.
When we are exercising there is more blood in our arterial circulation. Where did this blood come from and how did it get there ?
When the cells within the body are more metabolically active, they use more fuel, such as glucose and oxygen. Therefore during exercise, specifically in parts like the skeletal muscles, the blood flow through the tissues is dramatically increased during contraction, resulting in blood flow up to 15 to 20 times greater then resting muscles.
This increased blood flow is the product of different local, nervous and hormonal regulatory processes. As the oxygen and ATP gets used up in the working muscle, the active cells produces several metabolic byproducts (Such as adenosine, hydrogen ions and carbon dioxide). These byproducts leave the muscle cells and cause the capillaries within the muscle to expand and undergo vasodilation. When muscle is resting, only 25% of the capillaries are open, whereas during exercise 100% of the capillaries are open, this increase in pathways of blood flow assists in the delivery of new blood to the required
After exercise the R-R interval increased steadily from 0.48 to 0.68 seconds, while the heart rate BPM decreased steadily from 123 to 76; both trending back towards the resting values.
What happened to the T-P interval during exercise? Outline what this means for ventricular filling time.
During exercise there was a significant drop in the T-P interval which then steadily increased when exercise was completed. The T-P interval represents a period between ventricular repolarization (T) and atrial depolarization (P) and shows the period when the ventricles are relaxed and heart is electrically silent. During this period of relaxation the AV valves open and blood is able to flow …show more content…
During exercise the heart rate and stroke volume are both higher, however the mean pulse amplitude at a finger tip, will be lower, due to vasoconstriction and blood being directed towards active skeletal muscle instead.
When we are exercising there is more blood in our arterial circulation. Where did this blood come from and how did it get there ?
When the cells within the body are more metabolically active, they use more fuel, such as glucose and oxygen. Therefore during exercise, specifically in parts like the skeletal muscles, the blood flow through the tissues is dramatically increased during contraction, resulting in blood flow up to 15 to 20 times greater then resting muscles.
This increased blood flow is the product of different local, nervous and hormonal regulatory processes. As the oxygen and ATP gets used up in the working muscle, the active cells produces several metabolic byproducts (Such as adenosine, hydrogen ions and carbon dioxide). These byproducts leave the muscle cells and cause the capillaries within the muscle to expand and undergo vasodilation. When muscle is resting, only 25% of the capillaries are open, whereas during exercise 100% of the capillaries are open, this increase in pathways of blood flow assists in the delivery of new blood to the required