I have a Forerunner 35 watch and it has five activity profiles as you all know.
I went digging around after connecting my watch to my PC and found a folder called
GARMIN\SPORTS with the following files in it.
0RRUN.FIT 1RRUN.FIT 2CBIKE.FIT 4CARDIO.FIT 6WALKING.FIT
These look a lot like the activity profiles on my watch so I am wondering if you can add some more by dumping files in this folder. Does anybody know?
All the best