Question

At rest, what would be the approximate O2 consumption of a 50-kg young adult per min? And what would be the metabolic equivalent of the task of this person?

Answer 1

The maximum heart rate (MHR) = 208- (0.7 X age)= 208 -(0.7X50) = 208- 35 = 173 beats per minute

The resting heart rate (RHR) = heart beat per minute = 60 beats per minute

Vo2 ( approximate oxygen consumption) = 15.3 [(MHR)/(RHR)] = 15.3 [ 173/60] = 15.3 X 2.88

= 44.06 mL o 2 . min-1 .kg-1

Typical metabolic equivalent of rest = 3.5 mL/kg/minute ,

Thus VO2 (MET) = Relative Vo2 (mL/kg/minute) / 3.5 mL/kg/minute

VO2 (MET) = 44.06 mL o 2 . min-1 .kg-1  / 3.5 mL/kg/minute = 12.58 mL/kg/minute