When I have a semi- regular business trip to Palm Beach FL, I do some group rides out of Jupiter, FL.
Pro golfer Camilo Villegas is a regular on those rides…and he is an absolute beast on the bike. Accuracy of Peloton numbers aside, many golfers are fit AF, understand discipline and training. There is also an increased embrace of aerobic fitness among golfers.
in terms of physics: 1 J = 1 W*s
So holding 1 Watt for one minute would be 60 J. Or 100 Watt for 1 hour. 360 KJ.
So 1000 KJ in one hour would be 277 Watt average.
In terms of kcals burned it depends on how you converse it 
TR does 1:1 I think.
'nuff math
Me too. Huge ego boost when I installed the Assioma pedals
There’s 4.184 joules per calorie. If you divide that into 100, i.e. 100/4.184 you get 23.9 which is middle to top end of how efficient our bodies are in converting food to useful work. So for back of an envelope calcs you can just go 1:1. If you wanted to be really accurate then you’d need to work out an individual’s exact efficiency ratio under the appropriate conditions - temp, humidity, etc.
They’re probably adding BMR. I see the same thing happen in power-based spin classes.
Problem is, people will then add their inflated workout burn on top of the whole day’s BMR, double-counting BMR for the workout hour.