Cardiac output increase in exercise by
Ans: a (Increase in HR) Ref: Ganong 22nd ed/ p.632, 633In muscular exercise there is increase in sympathetic activity resulting in increased cardiac contractility and heart rate. Rise in heart rate is the major event that occur in normal individuals compared to increase in contractility, remember Cardiac output = HR X Stroke volumeTherefore, cardiac output increases in normal individuals at the cost of increase in heart rate.
Increase in heart rate
Increase in preload
Increase in afterload
Sympathetic stimulation
Heart, Circulation, and Blood