Why are my Calories reporting lower than work produced?
Normally like an outdoor ride recorded on Garmin 1000kj is about 1000kcal.
one Zwift example: 624 kJ , 596 kcal , 230 W avg. , 45:14 minutes.
The 624 kJ work calculates. However 624kj/4.184kj/kcal / 596kcal = .25.
This implies a 25% efficiency of chemical to mechanical energy which is high.
Is this Zwift just defaulting to a simple value?