adamwolf/intensity_minutes:
+6.46 due
         
or pay $0
intensity_minutes
3880d14f 0897 4d46 b0ae 94189ec1370c

This goal has the following fine print specified by adamwolf:

Intensity Minutes are a Garmin thing--when you are in an elevated heart rate zone for 10 minutes or longer, you get Intensity minutes. If you stay in a high enough zone, you'll get "double credit".