So my end goal is to see what time and percentages I spend in the different heart rate zones for my training. I want to be able to sort HR data by individual activity, multiple activities, and length of time (day/week/month/year). My Garmin account has all of this data, but I haven't found a way to parse it to my desired outcome.
I was able to get the results I wanted by doing the simple math myself from my Garmin activity data. But I feel there HAS to be an application or formulated Excel document out there that can handle this task much quicker....right?

Thoughts or suggestions?