Workout kJ Estimates

TrainerRoad Software
1

I have noticed that the kJ values assigned to workouts haven’t increased with FTP increases. Shouldn’t that increase proportional to changes in FTP?

2

Are you certain? They seem to be roughly correct for me - do you also see 689 kj for Obelisk?

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1 Like
3

I have 437 kJ so it must scale. I used Shadow Lake as a go by. It was 444 kJ before my FTP increase and still 444 kJ after. So I guess I’m not quite sure how to explain that…

Perhaps the workout analysis tool uses the kJ estimate for you current FTP and not your FTP at the time you executed the activity?

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4

Hey @abfiegen :slight_smile:

Great question!

FTP doesn’t factor into calorie calculations. It’s derived from power.

We’ve got two articles that explain it here: