Not sure if this is already available but in addition to the usual HR graph it'd be great to have a histogram that shows the amount of time & distance spent in each heart rate zone. I know the Garmin Training Center software has it but I like being able to access info via a web browser b/c I can use multiple computers
They don't yet. Others have ask. Also use those little "feedback" buttons at the bottom of the Garmin Connect pages and let them know you want it. The more requests they get the more likely they'll eventually add it.