1. Acute responses to exercise for the respiratory and cardiovascular systems

2. Cardiovascular System
Anticipatory Rise
Prior to exercise ADRENALINE causes the heart to beat faster to prepare the body
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3. Heart Rate Increases during exercise to increase blood flow
More Oxygen to working muscles
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4. Increased Blood Pressure
More blood is circulated
Arteries resist blood flow = Increased pressure
Systolic Blood Pressure Increases during exercise
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5. Vasoconstriction/Dilation
Vasodilation = Increase in diameter of blood vessels
Increased flow to muscles
Vasoconstriction = Decreased diameter
Less blood flow to less needy areas
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6. Respiratory Responses
Breathing Rate Increased
Breathe more frequently and deeper
Bring more oxygen in
Rid of waste products
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7. Neural and Chemical Control
Neural = Stretch receptors in the lungs
Send messages to the brain to alter breathing
Chemical =
Chemoreceptors – Sense changes in O2 + CO2.
Baroreceptors monitor movement
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8. Increased Tidal Volume
More air passes through to the lungs
More oxygen and carbon dioxide exchanged
©Subject Support 2010.