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Metabolic Equations for Gross VO2 in Metric Units

Walking
VO₂ (mL ^. kg^{-1 .} min^-1) = (0.1 ^. S) + (1.8 ^. S ^. G) + 3.5 mL^. kg^-1.min^-1

Running
VO₂ (mL ^. kg^{-1 .} min^-1) = (0.2 ^. S) + (0.9 ^. S ^. G) + 3.5 mL^. kg^-1.min^-1

Leg Cycling
VO₂ (mL ^. kg^{-1 .} min^-1) = 1.8(work rate) / (BM) + 3.5 mL^. kg^-1.min^-1+ 3.5 mL^. kg^-1.min^-1

Arm Cycling
VO₂ (mL ^. kg^{-1 .} min^-1) = 3(work rate) / (BM) + 3.5 mL^. kg^-1.min^-1

Stepping
VO₂ (mL ^. kg^{-1 .} min^-1) = (0.2 ^. f) + (1.33 ^. 1.8 ^. H ^. f) + 3.5 mL^. kg^-1.min^-1

VO₂ is gross oxygen consumption in mL^.kg^-1.min^-1
S is speed in m^.min^-1
BM is body mass (kg)
G is the percent grade expressed as a fraction
Work rate (kg^.m^.min^-1)
f is the stepping frequency in minutes
H is step height in meters