SFOS 28

Excess post-exercise O2 consumption

No further increase O2 uptake despite workload

Parasympathetic inhibition, sympathetic excitation prior to exercise

Increased blood flow to active muscle and capillary recruitment

Sympathetic vasocontriction of capacitance vessels

• Progressive decrease
• Compensates for increased CO to maintain blood pressure

• Respiratory system
• Cardiac capacity
• Peripheral circulation
• Metabolic capacity of muscles

• Higher vagal tone, lower sympathetic tone
• Lower resting heart rate

Blood pressure increases because peripheral resistance doesn't decrease to compensate for increased CO

• Valve thickened/fused - impedes flow into left ventricle
• Limits stroke volume