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

2. Assessment Criteria
P2 – Describe the cardiovascular and respiratory systems response to acute exercise M1 – Explain the response of the cardiovascular and respiratory systems to acute exercise

3. Cardiovascular System
Anticipatory Rise
Prior to exercise ADRENALINE causes the heart to beat faster to prepare the body
How might this affect an athlete at the start of their performance?

4. Heart Rate Increases during exercise to increase blood flow
More Oxygen to working muscles
Why would this benefit an athlete?

5. Increased Blood Pressure
More blood is circulated
Arteries resist blood flow = Increased pressure
Systolic Blood Pressure Increases during exercise
Why do you think this happens?

6. Vasoconstriction/Dilation
Vasodilation = Increase in diameter of blood vessels
Increased flow to muscles
Vasoconstriction = Decreased diameter
Less blood flow to less needy areas

7. Respiratory Responses
Breathing Rate Increased
Breathe more frequently and deeper
Bring more oxygen in
Rid of waste products
How does this help an athlete?

8. 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

9. Increased Tidal Volume
More air passes through to the lungs
More oxygen and carbon dioxide exchanged
What effect might this have on performance?

10. Assessment Criteria
P2 – Describe the cardiovascular and respiratory systems response to acute exercise M1 – Explain the response of the cardiovascular and respiratory systems to acute exercise