Oxygen consumption (VO2) is measured in a 70-kg subject on a treadmill at 2500 Ml per minute. This corresponds to:

A. 1 metabolic equivalent (MET)

B. 5 METs

C. 10 METs

D. 15 METs

E. 20 METs

One MET is equal to the amount of energy expended during 1 minute at rest, which is roughly 3.5 mL of oxygen per kg of bodyweight per minute (3.5 mL/kg/min).

For a 70-kg (150 lb.) person one MET would equal 250 mL O2 per minute.

So 2500 mL would correspond to 10 METs.

Recall that 4 METs are the equivalent of climbing two flights of stairs at a reasonable rate without stopping, or walking on level ground at 4 mph; and 10 METs are equivalent to participating in strenuous activity such as swimming, skiing, playing basketball or jogging at about 6 mph