Emotional conditions which alter the cardioaccelerator nerve. Nerves acting on the resistance and capacitance vessels. At rest, approximately 5 liters is pumped from the left ventricle per minute with a stroke volume of 71 ml per beat. Blood flow increases in proportion to the intensity of the exercise. Exercise training increases cardiac output capacity.
Exercise trained individuals achieve a higher cardiac output due to a larger stroke volume.
Blood Flow at Rest and During Exercise 1. At rest, approximately one-fifth of the cardiac output is directed to muscle tissue. A moderate increase in heart size is often observed in men as well as women in response to exercise training. Exercise-induced cardiac hypertrophy can be viewed as a fundamental physiological adaptation of muscle to an increased workload. Increase in muscle RNA content Myofibrils thicken Number of contractile filaments within the muscle fiber increases.