Currently in the Structured Workout Builder, Planned Work (kJ) is only calculated when the sport type is set to "Bike". Switching the exact same workout to "Mtn Bike" causes the kJ field to go blank — even when FTP is configured for Mtn Bike Power and the workout is built in % FTP with Target intensity. Planned TSS and IF still calculate correctly in both cases; only kJ is affected.

This was confirmed with TP Support (Anthony H.) and is not currently documented as a known limitation.

Why this matters: for athletes who genuinely train and race on MTB — with separate FTP, separate analysis, and different fueling demands — having parity between Bike and Mtn Bike in the Workout Builder is a meaningful improvement. Planned kJ is especially important for fueling strategy in long MTB rides and ultra-endurance MTB events, where carb intake planning depends directly on expected work.

The ask is simple: the kJ calculation should read the FTP from the active sport type, the same way it already does for the "Bike" sport type.