Your post was moved here, as the topic will answer your question.
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Don’t be sorry, read the relevant topics
You need:
- A Garmin device that is IQ compatible
- A HR chest strap that is able to record HRV - Polar H9 or H10/Garmin Dual/Suunto … (Polar H10 being the most versatile option if you have to buy something new)
- Install AlphaHRV from IQ Connect to your Garmin device
- Intervals connected to Garmin to get the necessary data streams
- Activate the Custom Activity fields in Intervals made by Inigo
If you think that you will have it by checking one simple checkbox, I’m going to disappoint you. Read up on it and if you run into a problem, ask for help here.
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I took the decision to withdraw them as I believe that the intention of these camps was not understood.
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Thanks for the reply. I already have all these items. My question is whether this information will automatically appear with each training session I do with the DFA Alpha 1 data.
Thanks!
Please, no.
It seems there is a misunderstanding on this. Those custom activity fields are not using any data provided by alphaHRV
Is that why my numbers stay exactly the same now?
It shouldn’t because as soon as you use one of those shared fields, you create your own copy. If you have the fields, they will remain functional. Some users again shared their own copy and that’s why you still see those and not the ones from Luisma/Inigo. But those fields had protected/hidden code, so the copies should be exactly the same.
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They don’t for me
I be just found out mine haven’t stayed the same either. They’ve gone down.
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I assume that Garmin HR Pro Plus broadcasts HR data (including RR intervals), and I see it in the runalyzer app, but alphaHRV does not work with Garmin Fx 8.
It does it
It should work and in fact there are users that are using it now successfully. I guess issues are related with the settings of communication protocol and it requires some tests to identify the rooth cause. Unfortunately I have no access to this HRM and I cannot do it myself. If I get enough info from users, I will add a more robust support for these models
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I still really wish for updated concise documentation on AlphaHRV. As interesting as it seems, the most authoritative info on it are two extremely long topics on this forum. Or at least I still can’t find anything else via Google search yet… Most places still tell me about the 0.75 number being important even though I’ve read here months ago that that’s probably outdated…
Hence my question here, wondering whether this graph indeed confirms I’ve kept an endurance pace (… OK there were two sprints when I started lagging behind on my pace partner) during an entire ~1h ride, given the very flat blue line here:
And presumably this otherwise tells me nothing since A) I didn’t follow the recommended protocol plus obviously B) I didn’t try to exceed Endurance pace.
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Bruce Rogers has an excellent write up on his teams recent paper on the value of DFA a1 that corresponds to LT1. Muscle Oxygen Training: Improving the HRVT1 agreement - IJSPP 10/2024 In summary you take the readings from the start of a ramp test, when it’s easy, and minus that from 0.5. The midpoint of that value is approx the right value your’e shooting for. For most people they’ve seen it’s above 1.
As a personal test I have been ignoring power and HR and training with dfa a1 target of 1. After my sessions at a target of 1 my morning HRV measurement is stable, which is an indicator that I’ve recovered within 24 hours so is indicative of easy training.
@Inigo_Tolosa I’m having an issue with a Wahoo Kickr Core Smart Trainer’s power readings not being picked up by Alpha HRV. I’ve updated to the latest version and this behaviour occurs on both a Forerunner 955 and Edge 840. I can confirm with Assioma power pedals on my other spin bike the power readings report fine. Anything i can do in the config to get the power readings? As I’d really like the readiness score 
Edit: Figured it out - you have to pair it to the Edge as a smart trainer and again as a power meter. Now I get readings.
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Just had a quick look at the paper and on my data on my most recent ramp my highest was 1.46 so I my first threshold should be at 0.98 (mid way between 1.46 and 0.5) so effectively 1.
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So are ye starting these ramps at really low watts in order to find the highest DFA a1 value? Say like < 30% FTP?
The HRVT1c custom value was defined as the midpoint between the maximal DFA a1 (Max DFA a1) value seen in the early portion of the ramp incremental and 0.5. This maximal value was always below 3 SD from the running 45 second local mean value. For example, if the maximal value during the early ramp incremental portion was 1.5, the corresponding V̇O2/HR HRVT1c was based on a DFA = 1.0 (midway between 1.5 and 0.5) as seen in Figure 1.
I get that, but in order to find the maximal, you surely need to be riding very low watts to start off?
Yep - I can’t see wattage reported but if you look at the HR it’s only 99-109 bpm
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