which of the following is true concerning Vo2 max

Which of the following is true concerning VO2 max?

It is a valid measure of cardiovascular fitness.

Energy to run a maximal 400-meter race (i.e., 50 to 60 seconds) comes from

a combination of aerobic/anaerobic metabolism, with most of the ATP coming from anaerobic sources.

The energy to perform long-term exercise (i.e., >30 minutes) comes primarily from

aerobic metabolism

Which of the following hormones are secreted by the adrenal medulla?

epinephrine

exercise trained individuals have a lower oxygen deficit; this may be due to..

having a better developed aerobic bioenergetic capacity

The drift upward of VO2 during constant-load exercise in a hot environment is due to

increasing body temp

which of the following is true concerning Vo2 max

it is a valid measure of cardiovascular fitness

Steroid hormones exert their primary effect by

regulating gene expression

The oxygen debt is generally higher following heavy exercise when compared with light exercise because heavy exercise

results in greater body heat gained, greater CP depleted, higher blood levels of epinephrine and norepinephrine, and greater depletion of blood and muscle oxygen stores.

The lactate threshold is defined as the work rate or oxygen uptake at which there is a systematic

rise in blood levels of lactic acid