December 1, 2023

Question 1

Question at beginning of lecture:

Explain page 167 to yourself many times

Question 2

VO2max in smaller muscles increases more than large muscles (greater cardiovascular strain) during submaximal exercise. Why

Answer 2

because there is less TPR (vasodilation) when exercising smaller muscles(ex: arms) submaximally as compared to larger muscles (ex: legs)

Result:
Q ↑↑↑ > TPR ↓ (vasodilation) = faster increase in VO2max

page 163

Question 3

why might high intensity resistance exercise not be an appropriate exercise prescription for a cardiac rehabilitation program

Answer 3

because

Valsalva →
large sympathetic drive →
extensive vessel compression →
big increase in BP

Result:
acute pressure overload for the heart

Question 4

Why is a Dramatic Increase in BP Dangerous?

Answer 4

↑ pressure on vessel walls

↑ cardiac work due to high “afterload”

Question 5

what can Increased pressure on vessel walls lead to

Answer 5

Atherosclerosis →
turbulent BF →
local weakening of vessel wall →
aneurysm →
susceptible to bursting →
happens in aorta or brain →
death

Question 6

what can Increased cardiac work due to high “afterload” lead to

Answer 6

Heart must develop increased LV pressure to overcome resistance

This means an increase in O2 requirement (increased blood flow)

Atherosclerosis may not allow for this increased requirement

Can lead to ischemia and necrosis