I’d go with how you feel rather than HRV on a day to day basis.
I’ve been using HRV and RHR for a while now but I’ve stopped worrying about exactly where I’m at daily and have become more aware generally that the trend matches my training. It should have ups and downs. If not you wouldn’t gain fitness.
On the third week of a hard training cycle I may be in the red for a few days, but if my rest week is coming, so be it.
I’m not sure if it has ever happened. But, hypothetically, If I feel fine but my HRV looks bad, I would take it easy. I’d always rather take one more easy day than planned than risk overreaching or even illness.
You need to use it every day for a long time, at least 6 months, to really learn your trends and benefit from it. Initially it all might look random, and you can’t compare to someone else or take advice from software.
As others have said, you probably need a bit more data to start making training decisions via HRV. At this point I would continue your training per your usual scheduling and track it to see how it reacts.
In regards to your HRV on the day of the Ramp test specifically, a lower HRV may not mean you’re not ready to perform. In fact, you could be amped up and ready to give a really good effort. I’ve read it is common to see an increase just before key performances simply because you’re getting excited about it. I think that’s why looking exclusively at the number can be misleading. If, on the other hand, it’s decreasing for no apparent reason, especially after a day or two of easy training, you may want to consider if external factors like life stress are impacting it negatively.
Like most metrics, HRV is useless without context. I’ve found that monitoring it has made me take a more global view in terms of life stresses and how they may be effecting my performance or recovery.
Finally, I will add anecdotally that doing a fairly large amount of aerobic riding (Z2) seems to increase my HRV readings the following day.
All good points @jasonpedersen, @hugo1, @Tanner1280 - thanks.
I ended up swapping my planned workouts. Yesterday, with the lowish HRV4T score I did the endurance ride, TSS filler that would have been today. Tried to focus on good nutrition and rest through the day. Despite 0440 wake up today I was back to a better HRV4T score and improving resting HR. So felt good about attacking Ramp Test. Bonus is since Ramp is lower TSS I can still do planned harder workout tomorrow and stay on schedule.
Guess I’m thinking a big part of my motivation with HRV4T is precisely being able to make better informed decisions for day-to-day workouts. I mean I felt OK yesterday with the lower score, but I wasn’t exactly rearing to go 
I had an interesting situation yesterday. HRV score was at an all time low of 2/10 (which correlated to my feeling rubbish), but I decided to press ahead with the VO2 max workout as in the plan (owing to other time constraints later in the week).
Had a great session though, hitting higher than prescribed numbers and today my HRV score (using Elite HRV) was 10/10 indicating that the session did me know harm whatsoever. I was expecting to see an even lower HRV score this morning, but this was not the case.
Not sure if any trends can be ID’d from this, but may be interesting to others!
I would regularly get that pattern with EliteHRV but I don’t with HRV4T. Something is different between the two algorithms.
It’s worth checking as well - do you take all of your readings at the same time of day (ideally when you first wake up)? They also recommend ensuring the same body position / breathing pattern etc. as well to ensure consistency between readings.
Will give this a shot - I really want to believe in HRV and willing to spend a little to enable me to do so!
Yep - Always exactly the same (breathing, body position etc).
I track HRV but I am not sure what I am getting out of it.
I don’t really cancel workouts if it is too low.
If it is high, it confirms that I am ready to tackle the tough workout.
Just to add - the quality of the heart rate strap you’re using is important. I ended up buying a Polar H10 as recommended by the developer of HRV4T. I figured I want to trust the data as much as possible, so was worth the investment in a decent HRM.
Even if you feel like you’re not getting much out of it at the moment, I’d continue to track it. The more data you build up, the more powerful it’ll be in terms of establishing trends etc. for the future.
That’s the one I’ve got - appears to be pretty consistent.
Anyone know how to import HRV data to HRV4training (downloaded as text files from EliteHRV)?
I’d just start a fresh with HRV4T. As @stevemz says, they use different algorithms.
Thanks, will probably take this approach if the data aren’t comparable.
I know you really can’t put too much value on the HRVTraining values for probably three or so months, but I’ve been tracking now for two weeks and my numbers rarely dip below 8.5. Is that normal?
Thanks
I use HRV to track fatigue and my overall well being. I use my apple watch 4. The generic apple health app along with Auto Sleep give me plenty of data. It’s like having a whoop band without a monthly fee,
It’s simple, high HRV I’m good, low HRV I need to recover, eat better, sleep more, or rest.
Is pretty cool to see your HRV react to each activity in your life.
@juansilva1 I have exactly the same set-up, apple watch 4 and auto sleep app. I might have picked the app advice on a previous post you made 
For me if I’m well below baseline I will opt for zone 5+ workouts over steady state zone 4 intervals, they always seem easier to complete on days you feel like crap. Then you need to look at post nutrition and recovery to get you back on track because that zone 5 session will beat you down even more, maybe follow with a rest day/recovery ride.
Yesterday I had Bashful +2 which pushed me down to 27 this morning, baseline is 55. I had Galena +1 floating in the background which needed to be completed sometime soon and I had no notion of jumping on the trainer. Today the weather outside was abnormally pleasant for this time of year in the UK, sunny and 12 degrees centigrade. I jumped on the bike, went outside and hoofed my way through Galena, felt great doing it and felt even better afterwards. 2 hours post ride I’m sitting at 85, I’ll be interested to see what it is a.m when I take it normally. HRV scores isn’t everything, if you feel mentally ready then go for it. 
I’m at the brink of dropping using HRV4T after few weeks. I have to say it measures something, but not my readiness for sure. Just a day before yesterday I’ve done a workout of IF 1.06 feeling quite well beaten next morning and HRV4T score (measured twice) was the highest ever measured meaning I am super ready to move mountains. Anyway, I took a complete day off and today it measured lower after the rest day. I feel good today actually. It makes no sense to me.