I am trying to understand how to use Swain HR to Power equation in my case. Here is a calculator where one can vary the inputs and see the various outputs based based on the equation: http://www.cyclingpowerlab.com/VO2maxPowerRelationship.aspx
Suppose my 20min HR is 183bpm and 20min Power is 280W. If I select an efficiency of 22% and set VO2Max to 4300ml the HR and Power align, 183bpm vs 280W, also another point on the graph is aligned for me and that is 171bpm with 250W.
Is this the right way to use equation or I should have data from a 1h test?