I am 57 years old. I know that my maximum heart rate is only 160. The garminconnect setting has the maximum at 185, which is way too high so the thresholds are useless to me. I can't find a way to make it lower. Changing the settings seems to only allow you to make it higher. This doesn't even make sense if they used the typical 220 minus age.
I did try using the search function for an answer without any luck.