[Cap] is short for capped. It means the workout needed to meet the ramp was higher than the workout that was sent out. The workout was capped at a max of load = fitness * 2 to ensure that the workout for the day doesn’t get too difficult.
Couple of reasons can lead to a capped workout
- Break day / missed workout leading to high form
- Ramp rate is high
In short capping works as a speed governor ensuring the pursuit of higher fitness doesn’t lead to burnouts or excessively long workouts.