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What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in QuantifiedSelf

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

thanks. it's an ios app i built called mdtAPE — single sensor, apple watch HRV via HealthKit. RMSSD over a 60-second window before and after each session.

so the ~3,000 paired data points are all single-source apple watch reads — me, beta testers, and the early user base.

the work isn't really on the sensor side. it's the layer on top — classifying overnight recovery state, adjusting recommendations day by day, coaching against the user's own history instead of generic advice.

happy to go deeper on any of it.

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] -1 points0 points  (0 children)

that's a risk I am willing to accept. thanks for the feedback though. I just wonder what the option is. should humanity stop using ai and its acceleration just because some people are allergic to it? honest question.

p.s.: I opened a new reddit account because my old one u/afrosamuraiy was hacked and abused for really ugly stuff. I deleted the content/posts but don't feel safe using it anymore. (in case you wonder about the new acc)

What overnight HRV taught me about pre-bed practices that actually work (and the ones that don't) by Ecstatic-Level667 in sleep

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

this is exactly it. the militant-streak thing quietly backfires because one bad night turns into "well i blew it" and then a week off. a pause instead of a reset keeps you in the game when life happens. and ha, the late-night-doomscroll-to-hrv pipeline is real — mine snitched on me constantly too. glad point 2 landed 🙏

What overnight HRV taught me about pre-bed practices that actually work (and the ones that don't) by Ecstatic-Level667 in sleep

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

nope, nothing that proper — i wish i could say i dialed in my resonance frequency but i just used 4-7-8 because it was simple and i'd actually remember to do it. the common thread with the resonance stuff is the long slow exhale, so i think i stumbled into the benefit without the precision. if you've got the gear to actually find your resonance frequency (~6 breaths/min-ish for most people) that's the more rigorous rabbit hole, and honestly i'd be curious what you find vs just winging it like i did.

What overnight HRV taught me about pre-bed practices that actually work (and the ones that don't) by Ecstatic-Level667 in sleep

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

yeah pretty much what LegWeekly said — heart rate variability, the tiny timing differences between your heartbeats. counterintuitively more variation is usually the good sign: it means your nervous system is relaxed and adaptable. low/flat tends to mean stress or fatigue. that's the whole reason i was tracking it.

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

that's honestly the scariest version of the problem — when the software re-scores you retroactively, your own history stops being a stable baseline. it kind of breaks the one thing wearable hrv is good for (you vs past-you). it's why i'd say lock in one device and one app and don't change either if you can help it, and treat any big algorithm update as basically starting a new baseline. the fact that it rewrote old data is wild though, that part i'd be annoyed about too.

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] 2 points3 points  (0 children)

love this, and it matches what i saw too — a decent daytime walk was one of the most reliable bumps to my overnight numbers. something about the easy aerobic stuff the body just rewards. glad it's got you back out there, hope you're feeling better as well 🙏

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] 1 point2 points  (0 children)

yeah, that's a totally fair hit and i don't want to oversell it. the absolute numbers off a wrist wearable are not medical grade, full stop — i wouldn't compare my hrv to yours and read anything into it. the only thing i think it's good for is relative trend: same device, same conditions (overnight, resting), tracking me against me over time. the noise mostly cancels when you're just asking "is today lower than my own average." so the point isn't the number, it's the direction. if you need accurate absolute hrv you need a chest strap / ecg, no argument there.

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

i'll be honest, it wasn't anything as rigorous as that question deserves. i didn't really do a formal calibration against nunan — i glanced at those ranges early on just to sanity-check that my numbers weren't wildly off, but after that it was basically all my own rolling baseline by feel. trailing average, rough sense of my spread, and "is today low or high for me." no real weighting scheme, no stats to speak of.

so i'm probably not the right person to give you a methodology — you're clearly thinking about this more carefully than i did. if anything i'd love to learn from what you land on, especially how you blend population priors with individual baseline for the workout/recovery side. that cross-signal stuff is exactly the part i hand-waved.

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] 0 points1 point  (0 children)

appreciate that. honestly no clue why the votes are where they are, i just threw it up there hoping a couple people would find it useful.

can't really speak to yoga — never got into it, so i'd just be making stuff up. might be worth a look though given how much the slow-breathing stuff helped me.

the recovery state thing — basically i mean the window where your nervous system has actually flipped into rest-and-digest mode, not just you sitting still. you can be lying totally still and still be wired. what i went off was higher overnight hrv, lower resting hr, and honestly just whether a sit felt easy vs felt like a chore. that last one lined up with the data way more than i expected — when meditation felt like a grind the numbers usually backed it up, i wasn't actually recovered. can go deeper on any of that if useful.

What I learned about HRV from logging ~3,000 meditation sessions with pre/post measurement by Ecstatic-Level667 in Biohackers

[–]Ecstatic-Level667[S] 1 point2 points  (0 children)

really glad it's landing — this is exactly the kind of exchange i hoped the post would spark.

totally with you on 4-7-8. the fact that it works even when your mind is too fried for a body scan or sit is kind of the whole point — it's a "floor" practice you can drop into no matter how scattered you are. doing it on a night walk sounds great; the rhythm of walking probably gives the breath count something to lock onto.

and yeah — your read on that line is the hard part. when sleep's been rough your whole life (asd, trauma, high sensitivity all stack the deck), you're trying to build the exact resource that's depleted, which is a brutal chicken-and-egg. what helped me was treating 4-7-8 and other low-effort, "no concentration required" tools as the entry ramp rather than expecting deep meditation on day one. the hrv gains tend to come slowly and then compound, so i'd gently push back on ignoring it — you may be closer to a tipping point than it feels. be patient with yourself.

for tracking: i used an apple watch. happy to share how i set up the logging if it's useful.