P1 18. The short term effects of exercise on the cardiac system

Question 1

what is stroke volume

Answer 1

the amount of blood pumped out of your heart per beat

Question 2

whats heart rate

Answer 2

the number of beats per minute that the heart generates

Question 3

what is cardiac output

Answer 3

the volume of blood pumped out of your heart per minute

Question 4

what is the equation for cardiac output?

Answer 4

Stroke volume x heart rate = cardiac output
SV x HR = Q

Question 5

what is resting heart rate

Answer 5

when you’re sat still

Question 6

what is recovery heart rate

Answer 6

the period of time when you’re recovering, so your heart rate is elevated but on its way down

Question 7

heart rates for
resting?
working?
recovery?

Answer 7

resting - 72 bpm
working - 156 bpm
recovery - 80 bpm

Question 8

what are the short term effects of exercise

Answer 8

SV, HR and Q increase
muscles need more oxygen so blood has to circulate your body quicker
heart increases the amount of blood being pumped per minute
increases speed of blood circulation
oxygen delivered to muscles quicker
CO2 taken away quicker too

Question 9

what are the short term effects of exercise on stroke volume

Answer 9

as intensity increases, so does SV
heart contracts with more force, squeezing more blood out per contraction
heart can only contrat so much, reaches its maximum SV and doesn’t go higher
intensity continues increasing, your SV decreases because your HR is so high that the heart doesn’t have time to fill fully up between contractions

Question 10

what are the short term effects of exercise on heart rate

Answer 10

prior to exercise
-resting HR is about 75 bpm
-HR starts to rise as you anticipate exercise
exercise
-HR plateaus when you reach the max HR
-220 - age = 204 bpm
recovery
-HR remains elevated
-slowly decreases, to allow slow recovery

Question 11

what is anticipatory rise

Answer 11

when your heart rate starts to rise before exercise has started, as you get ready for it too happen

Question 12

what are the short term effects of exercise on cardiac output

Answer 12

prior to exercise
-directly influenced by HR
-anticipatory rise
exercise
-directly influenced by SV
-increases as intensity increases
-reaches maximum either when max intensity or max Q
recovery
-Q remains elevated
-reduces slowly to allow slow recovery