Lecture 13_System Physiology 5 (1) - Lecture 13 System...

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Lecture 13 System Physiology 5 Cardiovascular System and Exercise KIN 3570 Dr. Hermann-J. Engels
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Cardiac Output Blood Flow Distribution Relationships between Flow, Pressure, and Resistance Blood Pressure Response to Exercise The Athlete’s Heart Today’s Class Objectives:
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Cardiac Output The amount of blood pumped by the heart each minute (L/min) Cardiac Output = Stroke Volume x Heart Rate Q = SV x HR Stroke volume = difference between end-diastolic and end-systolic volume
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Measurement of Cardiac Output Invasive Techniques: - Direct Fick Method - Indicator Dilution Noninvasive Techniques: - CO 2 Rebreathing - Bioelectrical Impedance
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Cardiac Output at Rest: Untrained vs. Aerobically Trained Q = HR x SV Untrained 5000 = 70 x 71.4 Trained = x Example shown is for a normal adult male Example
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Cardiac Output During Maximal Exercise: Untrained vs. Aerobically Trained Q = HR x SV Untrained 25000 = 200 x 125 Trained = x Example
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Cardiac Output: At Rest and During Exercise 20 15 10 5 0 0 Rest Maximums Cardiac Output (Liters/Minute) VO 2 Exercise Untrained Trained 30 25 20 15 10 5 0 30 25 Cardiac output _______________ with exercise intensity
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