I have started using the suggested workouts for my runs as of a few weeks ago, and I set them to use heart rate targets as opposed to pace. I also have an HRM-Pro Plus that I use during workouts.
My predicted max HR is 186, and my LTHR is 167 as measured by the HRM-Pro Plus. My HR Zones are based on LTHR%, using the default percentage bins from the device. As of now, a base run has a target of 139bpm, and currently averages out to ~9:00-9:30/mile over a 30-40 minute base run.
Today I got the first anaerobic assignment. It was 15:00 @ 139bpm, then 7 rounds of 1:00 @ 6:34/mi + 3:00 @ 126bpm. Simple enough I figured, albeit a little odd that there is a pace based target in there since I set it to use HR. When I was doing the fast intervals, it quickly stopped making any sense to me. I was in nearly all-out sprints, HR >175bpm, and the little indicator screen telling me that I was running slower than 7 minute miles for a significant portion of the time. Based on prior experience, I know that I am moving faster than that at that effort level.
Here is the pace field for the first 4 sprints, showing my fastest reading was 6:09.
Here is pace and GAP. GAP looks like it would average out to about the same as pace over the intervals (there were some little underpasses on the trail which I sprinted through).
Here are the stats for the intervals, which do seem to have correct average pace readings. The Avg GAP values look totally bogus, and kind of look like what the workout screen may have been showing me.
This seems completely broken. At best it is obnoxious, and at worst someone is going to get hurt trying to hit a broken real-time metric. Do I have something incorrectly configured on my watch, am I misunderstanding the metrics, or is this super broken right now? I would be very happy if this was just user error and I could fix it with some setting so any input there is welcome.
If this is a bug, then I will do anaerobic workout days in a DIY style based on HR. Does anyone have a suggestion for a target HR to go for in the fast intervals?
Thanks! Other than this, I would say that the watch has been great overall.