Watch App : HRV

Hi - I'm getting very different values with different HRM straps.

For the Garmin one HRV is in the 88-90 range
However with a wahoo Tickr X it is half that.

Is that expected?

While not originally expected, I do believe I know the cause. I have noticed on the strap that I have been using that I will sometimes get a reported interval that is greater than the time sine the last interval, and that is of course not possible. I have already handled this problem in the current code. I hope to release within about a week.

Hi - I'm getting very different values with different HRM straps.

For the Garmin one HRV is in the 88-90 range
However with a wahoo Tickr X it is half that.

Is that expected?

hi all
I've looked at hrv quite a bit over the last year. wouldn't say i'm an expert there's stuff on my site and elsewhere

firstly congrats to the developer who has produced one of the first properly useful apps ! I'm sure (hope) it will develop further.

anyway here's my two penneth worth:

1. re: comment above: I have tried LOTS of straps. currently using the tickr-x which works fine.
2. however battery status seems to make a difference. my polar h7 and suunto smart both appear to have quite a full battery but have stopped working as far as producing a hrv result (this is btle to mobile). so maybe the same battery issue could exist with garmin hrmrun. may possibly also be issues with BTLE interference of the ant signal or other phone devices sometimes ???? I'm sure some elec engineer will correct me on that.
3. I tried playing with the hrm-run and the 920 a while ago and doing some 3 minute sample files and analysing them elsewhere. sometimes it failed totally sometimes it didn't work too well but kinda worked.
4. people need to do this at the same caffeine-free time each day in the same position with an empty bladder. eg sitting or lying in bed
5. the reading itself is fine however IMHO what you need to do is look at a moving average - check out ithlete and bioforce. documentation on their site explains it quite a bit. you are looking for large variations from the moving average (prob 7 or 10 day) I think, not necessarily a large variation from yesterday
6. a high value is best. if sharkbait used 20lnRMSSD then 100 is about the practical maximum (although higher values are poss apparently)
7. apparently also the different testing protocols make a difference so with a 60/90 second protocol you get higher results (ithlete) compared to 2:30 (bioforce) giving lower ones. >90 is generally good
8. you CAN get some HIGH (normally good scores) when you are approaching a point of OVERTRAINING. so be careful with how you read it.
9. NB: HRrest should also be recorded by this app.
10. to be of real use the hrrest and hrv score need to be in a fit file to take elsewhere.
11. how you breathe is also important. your heart beat varies by your breaths (this is used by firstbeat, for example, to calculate your breaths per minute and used in the 920s more esoteric calcs - I believe epoc/metmax/vo2). I seem to remember that 7 breaths per min was what you should aim for (please correct me if I remember incorrectly)
12. can't wait to play :-)

FWIW: I've done hrv almost every day for over a year and I have to say it IS a good (but imperfect) indicator of readiness to train/recovery. readings fall if you are stressed ranging from stressed at work to the stress of a trapped nerve to the stress of exercise fatigue to the stress of an impending illness. so it appears quite 'clever' but not precise in saying what's wrong.

I use a different calculation than 20lnRMSSD (patented), but one that produces similar results.

HRrest. I was going to record the average HR during the test. I could include lowest 1 min average HR or something, but I would think a single lowest beat would misleading. The very nature of HRV means that you can have a single lowest beat well below the average.

The beta version is really just a "watch this space" placeholder. It works fine if it gets exactly the data it is supposed to get, but is easily fooled by certain dropped packets or bad data. For those really interested please hold out for the alpha release. Soon.

ah yes, I thought it was patented. I was going to mention that, sy.

HRrest is a measure of recovery as is waking-HRV

I was up too late last night, which is my excuse for asking what I think was a silly question about the HRrest. Anyways, I will include HRrest, thanks for the heads up.

I am not able to install the app... Any help? I have the newest Garmin Connect instaalled. Firmware 2.70 on watch cause i was not lucky with 3.03 and 3.07 beta!
Is it only available for latest beta firmware?

Okay, please forget it... I read it already... So I will wait for the next stable Firmware release, cause 3.07 drove me crazy.

Hey, i would really love to get a HRV but i can't get it to work on my fenix3. i downloaded, it installed it and even can start it but then i only get a blank field with a cross. any suggestions? i promise i will donate as soon as i get it to work cause i really appreciate the work guys like you are doing for the comunity.:cool:

Can the Fenix 3 actually support apps yet? I do not have the Fenix 3 device myself, so the app is only tested in the simulator. As I write this I have currently not seen any links saying that the current Fenix 3 firmware has support for CIQ apps. I'm going to go investigate this a bit more right now.

Looks like you're right. For example the star app seems to come with the same problem and dc rainmaker this guy who is writing all this great reviews says apps are yet to come for fenix3.
Another great job done by garmin selling a feature that's not available yet :mad:.
Thx anyway for your work hope there will be a firmware update soon.