Cardiac output in response to exercise

Question 1

What happens to cardiac output in relation to an increase in HR?

Answer 1

• Large increase in CO due to the increase in heart rate.

Question 2

Is there a relationship between exercise intensity and cardiac output?

Answer 2

• Yes, CO increases as exercise intensity increases until the maximum intensity is reached.

Question 3

What are the benefits of an increase in max cardiac output?

Answer 3

• more blood can be transported to working muscles

- this means more O2 can also be transported to delay fatigue

Question 4

increase in HR = ?

Answer 4

increase in HR= increase in SV=increase in CO

Question 5

How does exercise affect cardiac output?

Answer 5

• During exercise cardiac output increases more than the total resistance decreases
• the arterial pressure usually increases by a small amount.

Question 6

what is the equation for CO?

Answer 6

• SV x HR= CO

Question 7

What are the exercise values for a trained and untrained 18 yr old for Cardiac Output?

Answer 7

• 120ml x 202 (220-age)= 24.24L (UT)

- 170ml x 202 = 34.34L (T)

Question 8

What are the resting values for a trained and untrained 18 yr old for Cardiac Output?

Answer 8

• 70ml x 72 = 5.04L (UT)

- 84ml x 60 (bradycardia) = 5.04L (T)