MEDICAL BIOLOGY, HUMAN ANATOMY, PHYSIOLOGY AND PATHOLOGY - Y.I. Fedonyuk 2010

ANATOMY, PHYSIOLOGY, PATHOLOGY

CHAPTER 5. BLOOD AND LYMPH CIRCULATION PROCESSES AND THEIR PATHOLOGY

PHYSIOLOGY OF BLOOD VESSELS

5. REGULATION OF BLOOD CIRCULATION

5.4. EFFECT OF PHYSICAL ACTIVITY ON The Cardiovascular system

Because the previous Cardiac Output (CO) is no longer sufficient to meet the increased Blood demand of active Muscles, Cardiac Activity increases rapidly. In this case, cardiac output can increase 5–6 times, reaching 20–30 L/min. Of this volume, up to 80–85% is directed to the active skeletal muscles. While at rest, 0.9–1.0 L/min of blood passes through the muscles (15–20% of a 5 L/min CO), during contraction, muscles can receive up to 20 L/min or more. The intensification of cardiac activity During Muscle contraction occurs against the Background of a proportional increase in coronary blood flow. Autonomic regulation ensures that cerebral blood flow is maintained at its baseline level. The Blood supply to other Organs depends on the workload.



Last update: 08/08/2026

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