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Algorithms seem wildly off due to high maximum heart rate

I'm 43 and have a max heart rate of 205 (confirmed during workout with chest strap hrm). This gives me a very wide envelope of heart rates with my resting hr about 70. If I get up and walk around, my heart rate will jump up to 100-120 pretty quickly and easily. This is normal for me and not cause for concern at all, although if I were in better shape, my heart rate would stay a bit lower.

Even though I've set a custom maximum hr and the watch seems to know where my heart rate zones actually are, the algorithms that detect activity and stress levels don't seem to take that into account. It almost always shows me as being under high stress if I get up and walk around doing daily chores. It also gives me over 1000+ bonus calories in myfitnesspal for 'high activity' that I can be reasonably certain are bogus since I've been using myfitnesspal with my forerunner 230 and hadn't been getting those 'bonus' calories and lost/gained the projected weight.

For example, Friday, I didn't work out at all. Garmin Connect shows167 moderate intensity minutes and 160 vigorous minutes and said I gained 1413 calories by just walking around.

0 sensovision over 3 years ago

I've a similar problem but instead I've very low resting pulse rate for my age and fitness condition, and if you're correct and heart rate and not HRV is influencing stress score more, that would explain why my watch almost never registers high stress.

Anyway, I wonder if you had that problem before or they appeared recently? It seems that in the recent firmware Garmin changed something with HR measurement as it seems to be more off than it was in the past, check this thread if you're curious https://forums.garmin.com/sports-fitness/healthandwellness/f/venu/271639/recovery-rate-wrong-since-v-6-20-resulting-in-lower-vo2-max

And if you have a chest strap you may want to do more testing to see if it's the case.

0 Phane over 3 years ago in reply to sensovision

That was my heart rate readings for the aforementioned Friday. I do not see any readings there that look unheard of. (Yes, it was a long day) Connect is saying almost 3 hours of that was 'vigorous' intensity and another almost 3 hours was 'moderate'. The highest it got all day was a hair under 69% of my max heart rate, which certainly wouldn't be anywhere close to vigorous to me but might be moderate... still nothing there suggests I was at 141 for 3 hours... let alone 6.

As far as this being a recent problem, I had a Forerunner 230 which didn't have a built in HRM, so it didn't have any of this 'stress' or 'intensity' data, I only measured HR with a chest strap during workouts. It died on me a couple of months ago. After doing research, I went to the Vivoactive 4 starting last week and found this problem right away.