Question

1.   Assume that a 78 kg man cycled at 2 kp on a Monark (mechanically braked) leg ergometer at 50 rpm for 10 minutes.   The VO₂of this steady state exercise was 1.08 Liters/min. His resting oxygen consumption was 280 ml/min.

            

            Determine his gross and net mechanical efficiency.  

Answer 1

Given is:-

Now,

the power can be calculated as

by plugging all the values we get

; where D=6 meters for monark

which gives us

We can find gross VO₂

Now,

net VO₂ = 62.02-1.08

which gives us

Net VO260.94ml/kg - min