↑ in Heart Rate ↑ in release of adrenaline ↑ in release of heat ↑ in dilation of vessels ↑ in blood flow to muscles ↑ in Stroke Volume ↑ in Cardiac Output ↑ in Blood Pressure Short Term Responses – CV System
Heart Rate Inc: Heart has to beat faster to pump blood around quicker
Stroke Volume Inc: More blood is needed to deliver oxygen, so heart works faster to pump out more blood from the left ventricle per contraction.
Cardiac Output Inc: exercise = heart pumps out more blood in one minute.
Blood pressure Inc: in response to the body's demand for more oxygen rich blood than normal.
Blood redistributed: higher demand for oxygen and the removal of carbon dioxide, so the heart has to work harder to get the blood to the muscles faster.
Paired Activity Long Term Responses
↑ in Cardiac Output ↑ in Stroke Volume ↑ in contraction ↑ in size of heart ↑ in haemoglobin ↓ in RHR ↑ in elasticity + thickness of arteries ↑ in capillaries Long Term Responses
Hypertrophy of the heart: Like any muscle, the heart can become bigger in size.
Increase in stroke volume at rest: Heart has become larger it can therefore hold a larger volume of blood.
Increase in cardiac output: Due to hypertrophy in one beat, the heart can pump a larger volume of blood than it could before.
Decrease in resting heart rate: Heart is larger, it can now beat slower but still achieve pumping the same amount of blood. More efficient.
Increased capillaries in trained muscle: Surface area of muscles increase, so there are more capillaries around the trained muscle.
Describe 2 Short-term effects of exercise on the CV System…
Describe 2 Long-term effects of exercise on the CV System…