HRV gaps during the night

I don't see gaps in the graph on the watch but I think this is due to to the way it charts it, just connecting each data point, even if there are only a few throughout the night like you mentioned before.

My charts are even more sparse than yours and more closely match the ones posted above by @6634965.

Here is last night's HRV graph:

And the night before:

And this is May 4th and how almost all of them looked prior to that date:

I have no battery saver settings enabled, and like you, my heart rate graphs through the night are solid:

Same issue then, we just need to live with it I guess!

Garmin-Sierra

Garmin-Laurie

Do any of you know if Garmin is looking into this?

I extremely tighten the strap below the bone wrist and got a much better reading yesterday. Might be that the issue.. is just inconsistent 

olives_19 said:

I extremely tighten the strap below the bone wrist and got a much better reading yesterday.

Might the wearing of the watch be the issue in this case? The watch needs to be worn a couple of finger widths above the wrist bone, that is towards the elbow. 

I absolutely believe that the issue here is one of data quality, but I have a very difficult time believing it has anything to do with watch placement or tightness because we're looking at a bunch of people who had good data quality for long periods of time and then it suddenly degraded.

I've noticed that the top HR LEDs appear to be dimmed when I first take the watch off, and then the brighten presumably looking for a wrist that isn't there before turning off. Does anyone know if this is normal behavior/has it always been this way. Perhaps there was something recently added as a power saving metric that reduced the LED brightness that leaves enough data quality to get heart rate, but the pleth it's getting isn't strong enough to identify a single point on each successive beat to be able to accurately measure HRV.

Just to demonstrate my own issue with this:

The HRV spike that has occurred since June 2 is directly correlated with the overnight HRV gaps, and gaps in stress measurement.

First thought with this was that there had been some sort of physiological change with me (a heart rhythm change for example), but I work in an environment where I have access to the tools (proper EKG, I teach electrophysiology) and can confirm that my physiologic state hasn't changed.

There is something here, either hardware of software (software seems much more likely with more than one person and device involved).

The last 2 nights I got no gaps by wearing it above the wrist bone tight. But now didn't change anything and I am having clear gaps again

Try to adjust it above the wrist tight - it did fix it so far from my end, just small gaps during the night but it solved the big gaps