My previous experience has been that Garmin Watches hand out Intensity Minutes way too easily for people (i.e. me) who have higher resting heart rates. It seems to use heart rate as one of the metrics when determining Intensity Minutes, and the more your heart rate is than a "normal" resting heart rate, the more Intensity Minutes. How have others addressed this, or have you just learned to live with it?
The Garmin Support website suggests that your average resting heart rate calculated by your Garmin device is used when calculating Intensity Minutes, but that has yet to be my experience.