Cardio-vascular Adaptations to Exercise THE HEART • Cardiac Hypertrophy – increases: • size of heart • efficiency, especially at rest • thickness of myocardium • left Ventricle filling in diastole phase • Blood pumped/minute & force of contraction • Stroke Volume – At rest & during exercise • Max. Cardiac Output THE HEART This results in: • Decreased resting heart rate • Bradycardia – below 60 bpm (Indurain 30bpm) • However, no change in CO at rest due to decrease in HR THE CIRCULATORY SYSTEM • Increased capillarisation • Improved vasculature efficiency • Vasoconstriction/dilation • Improved blood shunting • Decreased Blood Pressure at rest (unchanged during exercise) THE CIRCULATORY SYSTEM • Increases in Blood Volume (plasma content) • Decreased viscosity • Increased Red blood cell volume & Haemoglobin • Blood haematocrit (rbc/total vol.) decreases due to greater plasma increase NOTE!! • Few adaptations take place in the Cardiovascular system as a result of strength training. • Adaptations occur as a result of aerobic training.