The relationship between VAM and relative power output is expressed as follows :  Relative power (Watts/kg) = VAM (metres/hour) / (Gradient factor x 100) This gradient factor ranges between 2.6 for a gradient of 6\% and 3.1 for a gradient of 11\%. To work out the gradient factor take 2 + (\% grade  /  10  )
Relationship to relative power output Relative power means power P per body mass m. Without friction and extra mass (the bicycle), the relative power would be VAM times acceleration of gravity g : With g = 9.81 m/s2, this is equivalent to Relative power (Watts/kg) = VAM (metres/hour) VAM (metres/hour) / 367 Including the power necessary for the extra mass and dissipated by friction leads to a lower number in the denominator. An empirical relationship is Relative power (Watts / kg) = VAM (metres/hour) / (200 + 10 × \% grade )
R
The relationship between VAM and
Relationship to
R
is expressed as follows
Relative power means power P per body mass m. Without friction and extra mass (the bicycle), the relative power would be VAM times acceleration of gravity g
A
With g = 9.81 m/s2, this is equivalent to
R
/ (Gradient factor x 100)
VAM (metres/hour) / 367
R
This gradient factor ranges between 2.6 for a gradient of 6\% and 3.1 for a gradient of 11\%. To work out the gradient factor take 2 + (\% grade
Including the power necessary for the extra mass and dissipated by friction leads to a lower number in the denominator. An empirical relationship is
A
Relative power (Watts
A
kg) = VAM (metres/hour) / (200 +
A
× \% grade