Acute responses to exercise for the respiratory and cardiovascular systems

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

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?

Heart Rate• Increases during

exercise to increase blood flow

• More Oxygen to working muscles

• Why would this benefit an athlete?

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?

Vasoconstriction/Dilation• Vasodilation =

Increase in diameter of blood vessels

• Increased flow to muscles

• Vasoconstriction = Decreased diameter

• Less blood flow to less needy areas

Respiratory Responses• Breathing Rate

Increased

• Breathe more frequently and deeper

• Bring more oxygen in• Rid of waste products

• How does this help an athlete?

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

Increased Tidal Volume

• More air passes through to the lungs

• More oxygen and carbon dioxide exchanged

• What effect might this have on performance?

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