- The workouts are saved but the report of intensity minutes is damaged and submitted the information our my daily routine, just keep one or two activities.
Intensity Minutes are not the minutes of your workout.
Read the explanation of Intensity Minutes in the document How Does the Intensity Minutes Feature Work on My Garmin Watch?
The most important part of the document is this:
In order to earn intensity minutes credit, you must reach or exceed 10 consecutive minutes where either your step count rate or heart rate is elevated above the threshold that is considered moderate intensity.