exercise physiology

Question 1

VE

Answer 1

RR * TV

minute ventilation: how much air you bring in/out in a minute (L/min)

Question 2

Q

Answer 2

cardiac output, how much blood you expel per minute

HR * SV (mL/min)

Question 3

VO2

Answer 3

oxygen consumption during aerobic exercise (how much you can bring in AND use)
linearly related to energy expenditure
%change in O2 difference * VE

Question 4

absolute vs relative VO2

Answer 4

absolute: no body weight used in the exercise (LO2/min)
relative: when body weight is a factor, (mLO2/kg*min

Question 5

rate pressure product

Answer 5

how hard the heart is working – how many times it beats against what resistance (systolic BP)
–clinically significant for knowing when angina may come on

Question 6

peak value during exercise vs max

Answer 6

peak is the highest the person reached during that bout of exercise, might not be max

Question 7

coronary perfusion during rest and exercise

Answer 7

rest: extraction is 70-75 =%
exercise: coronary arteries dilate for increased flow and pressure

Question 8

respiratory rate during exercise

Answer 8

a person is never limited by their respiratory rate, it can always go higher

Question 9

tidal volume during exercise

Answer 9

goes up until max, usually does not get bigger with training because respiratory rate can take over

Question 10

minute ventilation during exercise

Answer 10

has to increase

Question 11

changes in HR with training

Answer 11

HR goes down at the same workload
Max HR DOES NOT change, but you can do more at that HR
this is a good thing because it means you have more reserve

Question 12

HR recovery measures

Answer 12

within 1 min of stopping: decrease 15-20bpm=good, less than 12 is a bad prognostic of the cardiovascular system
within 2 min of stopping: 53 & above=good, 22-52 okay, >22 bad

Question 13

changes in SV with training

Answer 13

increases with training, end diastolic volume increases and so more exits with each ventricular contraction

Question 14

changes in Q with training

Answer 14

cardiac output at rest will not change because there is a fixed value needed, SV and HR change proportionally
Qmax changes because your ability to do more work increases, so there is a higher necessary Q at that workload
the increase can ONLY come from an increase in SV because HRmax does not change

Question 15

RR, TV, VE after training

Answer 15

do not change at resting and submax
max VE is higher after training because of the higher workload demands, so proportion of RR and TV are variable based on the individual