#hrv — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #hrv, aggregated by home.social.
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Написал боту «как прошла неделя». Он сам полез в Garmin и ответил
Garmin у меня на руке два года. Сон, пульс, HRV, стресс, Body Battery, каждая тренировка по секундам, каждый подход в зале. Всё это оседает в Garmin Connect и там же и остаётся. Хотелось просто спросить у ChatGPT, как прошла неделя. По своим цифрам, а не общими словами про сон вообще. ChatGPT их не видит, поэтому спрашивал по-другому: открывал Garmin Connect, скринил график сна, скринил HRV, скринил тренировку, кидал скрины в чат один за другим. Работало, но криво. На одном скрине сон, на другом HRV, а связать их между собой должен был я сам, руками, в голове. ChatGPT видел кусок картинки, а не то, что происходило со мной за неделю целиком. Задолбался. Написал скрипт, который сам забирает сон и HRV за сегодня и складывает в файл. Без плана на будущее, просто чтобы не переписывать руками. А дальше пошло по накатанной: файла быстро стало мало, появился отчёт за неделю, потом бот в Телеграме, потом бот научился не только отвечать, но и сам создавать тренировки в Garmin. Сейчас это открытый проект. Ставится на свою машину. Про архитектуру и код у меня отдельная статья, там кэш и все технические подробности. Здесь про другое: что реально можно спросить и зачем вообще этим заниматься.
https://habr.com/ru/articles/1072224/
#Garmin #Garmin_Connect #AIагент #ИИ #Telegramбот #носимые_устройства #здоровье #HRV #тренировки #open_source
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2/
Key Points from:
Wearable Heart Rate Variability Monitoring, Autonomic Dysfunction and Post-exertional Malaise in Long COVID: An Observational Studyhttps://link.springer.com/article/10.1007/s40279-026-02487-4
#LongCovid #HRV
@longcovid @mecfs #PASC #PwLC #postcovid #postcovid19 #PostCovidSyndrome #LC #Covidlonghaulers #longhaulers -
From the Netherlands
Wearable Heart Rate Variability Monitoring, Autonomic Dysfunction and Post-exertional Malaise in Long COVID: An Observational Study
https://link.springer.com/article/10.1007/s40279-026-02487-4
Screenshot from latest Science for ME weekly update
@longcovid
#LongCovid #PASC #PwLC #postcovid #postcovid19 #PostCovidSyndrome #LC #Covidlonghaulers #longhaulers
#HRV #MEcfs #PwME #CFS #ME #MyalgicE
@mecfs -
DATE: August 8, 2026 at 10:00AM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: New study suggests anxiety symptoms drive the physical stress markers linked to depression
A recent study published in the journal Psychoneuroendocrinology suggests that physical signs of chronic stress, which are typically associated with depression, might actually be linked more closely to symptoms of anxiety. The findings provide evidence that biological markers like inflammation and altered stress hormone rhythms tend to associate with physical feelings of anxiousness rather than a loss of pleasure or general sadness.
Depression and anxiety often occur together in the same people. Because of this overlap, mental health professionals and researchers sometimes struggle to tell which condition is driving physical health problems.
“Depression and anxiety are highly comorbid, and anxiety is itself a symptom within the clinical definition of depression, so it’s unclear whether established links between these conditions and chronic stress biomarkers (e.g., cortisol, inflammation, heart-rate variability) reflect depression-specific, anxiety-specific, or nonspecific/shared symptoms,” said study author Peter B. Fitzgerald, who completed his master’s degree in psychology at American University and is an incoming doctoral student in the Social, Cognitive, and Affective Neuroscience program at Catholic University of America.
Fitzgerald noted that older data often failed to separate these interwoven feelings. “Prior research has been limited by diagnostic categories and measures that do not disentangle symptom dimensions,” he said. To understand how mental health affects the body, scientists rely on measuring physiological stress indicators.
One common indicator is the diurnal cortisol slope, which tracks how the stress hormone cortisol changes throughout the day. Typically, cortisol levels peak in the morning and gradually drop by bedtime, meaning a flatter slope reflects a disrupted rhythm and chronic stress. Researchers also look at systemic inflammation by measuring immune system proteins like C-reactive protein and interleukins in the blood. Low-frequency heart rate variability provides another window into bodily stress by tracking how the time between heartbeats changes, where lower variability indicates a poorer ability to handle stress.
Past studies have frequently connected depression to a flattened cortisol slope, high inflammation, and low heart rate variability. However, the surveys used to measure depression often include questions about anxiety and general distress. The authors of the current study wanted to separate overlapping symptoms to test which specific feelings actually predict biological stress.
“We used the MASQ, a measure designed to separate general distress from disorder-specific symptom dimensions, to test which biomarker associations are shared versus unique to anxious arousal or anhedonic depression—something few prior studies have done,” Fitzgerald said. To do this, the researchers analyzed data from two large, independent groups of American adults. The first group included 1,190 participants from the Midlife in the United States 2 project, and the second group included 806 participants from a related refresher project.
Participants completed a specialized questionnaire designed to separate mood and anxiety symptoms into three distinct categories. These categories included general distress, anhedonia, and anxious arousal. Anhedonia refers to a loss of interest and pleasure, which is specific to depression. The scientists then collected saliva and blood samples alongside resting heart rates, controlling for age, sex, and smoking status.
Across both groups of participants, anxious arousal emerged as the strongest and most consistent predictor of physiological stress. “Anxious arousal—the physical signs of a body in a state of alarm, like a racing heart, shortness of breath, trembling, or dizziness—appears to be the primary driver of the links between depression, anxiety, and the stress-related physical toll that predicts chronic health problems, rather than depression-specific anhedonic symptoms,” Fitzgerald told PsyPost.
“This only becomes visible with dimensional analysis; looking at depression and anxiety as separate diagnostic categories, as most prior research has, obscures the pattern.”
This stood out to the researchers, as they had initially made a different prediction. “The research linking depression to these biomarkers is extensive and well established, while the anxiety side of that literature is thinner and less consistent, so we expected anhedonic symptoms to show the stronger associations and anxious arousal to show weaker ones, if any,” Fitzgerald said. “The opposite happened. Anxious arousal’s associations were much more clear and consistent across stress biomarkers.”
Higher levels of anxious arousal predicted a flatter, unhealthier diurnal cortisol slope, as well as elevated levels of C-reactive protein and interleukin-6. In addition, participants with higher anxious arousal tended to have lower heart rate variability. When the researchers adjusted their statistical models to look at all three symptom categories simultaneously, the physical symptoms of anxiety remained the dominant predictor, while anhedonia showed much weaker and less consistent links.
The researchers then ran a second set of analyses using a different, traditional survey called the Center for Epidemiologic Studies Depression Scale, which blends general distress, anxiety, and depression into a single score. When using this traditional survey, higher depression scores successfully predicted a flatter cortisol slope, higher inflammation, and lower heart rate variability. This comparison suggests that older studies linking broad depression to physical stress might have accidentally been measuring the effects of hidden anxiety symptoms.
Still, the overall impact of a depression diagnosis remains a serious health concern. “This isn’t ‘depression doesn’t matter’ or ‘it’s really anxiety, not depression,'” Fitzgerald cautioned. “Depression is still genuinely linked to worse biomarker profiles—the point is about which symptoms are the mechanistic driver within that broader picture, not that the depression-biomarker link is spurious.”
In a third step, the scientists looked at a subset of participants who provided data roughly 10 years later to see if mood symptoms predicted changes in biology over time, or vice versa. The longitudinal results indicated a two-way relationship between anxious arousal and the stress biomarkers. Higher anxious arousal at the beginning predicted a flatter cortisol slope a decade later, while a flatter cortisol slope, higher inflammation, and lower heart rate variability at the start predicted increases in anxious arousal over the next 10 years.
It is incorrect to conclude from these findings that feeling anxious directly causes negative changes in the immune system and stress hormones. The biological relationship is highly complex and heavily influenced by outside factors like body weight and medical history. When the researchers factored in body mass index, diagnosed chronic health conditions, and anti-inflammatory medications, the statistical links between anxious arousal and the biomarkers weakened, with body weight playing a particularly large role in the inflammation data.
The study also relied on people from the general population reporting their own symptoms on a sliding scale. These findings might not apply to individuals diagnosed with severe, clinical depression or specific anxiety disorders in a hospital setting. The biological realities of psychiatric disorders can differ from everyday variations in mood.
Future research should investigate a wider range of biomarkers, such as metabolic profiles, to build a more complete picture of how the body handles psychological distress. Scientists also need to better understand exactly how body weight and chronic illnesses interact with anxiety symptoms to produce inflammation and alter cortisol levels.
The study, “Differential associations of depression and anxiety with stress-related biomarkers,” was authored by Peter B. Fitzgerald, Yiqing Alice Fan, Evelyn Behar, and Kathleen C. Gunthert.
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Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
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#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #AnxiousArousal #StressBiomarkers #CortisolSlope #Inflammation #HRV #DepressionVsAnxiety #Psychoneuroendocrinology #MASQ #MentalHealthResearch #ChronicStressEffects
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@tomkindlon @mecfs #Garmin has really good watchfaces for pacing for daily use.
In contrast to that, #Withings #Scanwatch 2 has also #HRV monitoring at night, which is needed for your #baseline. And a lot of features, which the hide behind 10€/month. BUT: Garmin gives you late crippled data via their #API. Withings gives you all #data after syncing the watch 2 Minutes later.
People have to understand that they need facts. And you need discipline & rules.
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@tomkindlon @mecfs SInce half a year after the first crash, a friend of mine uses the #Garmin Venu 3 with #HR monitoring and HRV and alarms, 'cause he didn't trust his feelngs, just the facts. For pacing essential. Connected it to #influx and #grafana for a deeper view. Tried it with #Apple, but they measure the #HRV not at night, but over the whole day with some #algorithms. Additionially he has the data from 3 yrs. #withings #scanwatch without HRV measurement.
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A couple things to keep in mind. Don't track HRV during acute stress or right after caffeine. That data won't be reliable. And don't obsess over single scores. Look at trends over time instead.
You'll likely feel calmer, make clearer decisions, and bounce back faster between demanding tasks.
#Biohacking #StressManagement #HRV #EntrepreneurLife #PeakPerformance #Productivity #Focus #Wellness #Energy #Recovery (2/2)
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QUESTIONS
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My main question is for tips on how to manage orthostatic hypotension.
There is a lot of discussion about what to concentrate on during training with hypotension versus hypertension, but the first question is probably: Should I even treat this as a hypotension and concentrate on getting my blood pressure up or should I rather concentrate on better regulation of blood pressure, if that is even possible. For example for burnout I learned that to reduce stress the goal is not to get the heart rate down, but to increase the heart rate variability (HRV). Is there such a thing as training for blood pressure variability/flexibility?2
Next question is for tips on how to manage burnout and PAIS if and when I get both at the same time.
My burnout management involves lots of activities ranging from light intensity long walks to sprints and high intensity interval training and strength training as well as lots of meditation, breathing exercises. I try to go for a walk for at least one hour after every meal, because (at least during a sick-leave) meals cause the most and longest lasting stress if I don't walk it out. That's why I try to eat only once a day at noon - eating in the evening can ruin my sleep.
My management during an infection that feels like the start of a PAIS involves lots of sleeping without any circadian rhythm detectable and very little activity.
My management of PAIS involves pacing which I'm not good at yet though. It's really hard to know what is too much and what is too little. But I guess I can't be very wrong with just lots of slow walking without too much uphill parts.3
Now if you have any other general tips on managing any of the mentioned ailments feel free to let me know. I didn't mention everything I know already, but feel free to also mention things you assume I already know.#FollowerPower #PleaseHelp #AskFedi #question #burnout #pais #PostCovid #LongCovid #MECFS #FatigueSyndrome #fatigue #orthostasis #OrthostaticHypotension #OrthostaticDysregulation #pacing #HRV #BloodPressure #BloodPressureManagement #syncopation #BurnoutManagement #PAISManagement
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I have questions to people who have knowledge about Burnout, PAIS (post-acute infection syndromes, like Post/Long-Covid, ME/CFS, etc...), orthostatic hypotension, blood pressure management, fitness, pacing, etc.
This will be a long post and you don't have to read all of it. Just look for the paragraph with the headline "questions" in the first reply.
I'm mostly writing so much to get my own thoughts in order.NOTICE
I'm asking this here in the Fediverse because this is the best place to reach actual people who know stuff. Before the ecocide slop boom I'd have started with internet research, but that's no real option anymore. If an account answers me that seems like AI it will be blocked. If you answer me with what you just found on random internet sites, you will be blocked. Everybody else: Thank you! Btw you don't have to be a formal expert on any of the subject matters. Anecdotal evidence by people affected or relatives is highly valuable too.
BACKGROUND
I'm prone to both burnout and PAIS (undiagnosed, because the health system is inadequate) but haven't yet had both of them at the same time. This might be different now. My burnout is definitely back and I'm having an infection that feels a lot like it will turn into a PAIS. I've had a PAIS two times both starting in MAy of 2024 and 2025 and lasting for 3 months each. So this would be the right time to get it again. Since the last PAIS I've had two infections though that felt like the start of PAIS, but I probably stopped them with lots of medication, supplements and other methods.
My last sick-leave was due to my first burnout for 6 weeks (obviously not long enough).
I'm on sick-leave again since Wednesday because the burnout is back - the infection broke out one day later, but probably already made my body weaker before, playing a role in the burnout-relapse.MY SYMPTOMS
For burnout my main symptoms are: tinnitus, tensions in the ear, jaw & neck area, headaches, bad sleep, fatigue, susceptibility to stress, low psychic resilience.
For the PAIS its fatigue, bad sleep, brain fog, bad performance in all systems (fitness, cognition, social, etc..), malaise, some symptoms of a cold or allergy (constant tingle in my nose, running nose, sometimes coughing and sneezing, ...) and bad memory that lasts longer than everything else (years instead of months).SPECIAL SYMPTOM: ORTHOSTATIC HYPOTENSION
I've had bad orthostatic hypotension as a child with regular syncopations. It has gotten better (rarer) and I've learned how to deal with it, at least a bit. I do still have it whenever I have an illness that makes me bedridden, like infections and depressions.
There are basically 4 levels:
1 (usually without positional change): I feel that something is wrong with my orthostasis.
2 (usually with some positional change, like from lying to sitting): I feel dizzy and weak, like my brain is not supplied with blood as it should be, but no signs of unconsciousness.
3 (usually when changing from lying to standing): I feel my conciseness fading, I get tunnel vision, my legs let up and I have to hold tight to make sure I don't fall. I get the feeling of a slight dissociation, but I'm still there enough to control it and it slowly fades away giving me a warm comfortable feeling when the blood flows back to everywhere where it's needed.
4. (sometimes combined with 3 and me not controlling it well, sometimes immediately after standing up too quick after lying for a while): I loose consciousness and fall down, sometimes banging my head badly. I haven't had this level since my teenage years and my consciousness always came back immediately when I'm on the ground.
Now I've learned that orthostatic hypotension is both a symptom and a risk factor for PAIS and since I've had it forever I think it might be a good idea to learn to manage it better as to not get PAIS again or at least less frequent.#FollowerPower #PleaseHelp #AskFedi #question #burnout #pais #PostCovid #LongCovid #MECFS #FatigueSyndrome #fatigue #orthostasis #OrthostaticHypotension #OrthostaticDysregulation #pacing #HRV #BloodPressure #BloodPressureManagement #syncopation #BurnoutManagement #PAISManagement
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You'll have fewer energy crashes, stay calmer under pressure, and make better choices based on how your body actually feels.
#HRV #Biohacking #EntrepreneurLife #StressManagement #PeakPerformance #Productivity #Focus #Efficiency #Health #Wellness #Energy #Recovery (3/3)
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A four-week randomized study of 88 individual in two test groups and one control group evaluated the effects on heart rate variability (HRV) of controlled breathing at either a fixed rate of 0.1 Hz or the individual-specific resonance frequency (where blood pressure oscillations are maximized). Both treatments were equally effective at reducing stress, but neither produced changes in resting HRV.
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Pro Tips: Don't chase a high HRV number. Consistency matters more than peaks. Avoid checking HRV mid-workout. Morning readings are most reliable for recovery decisions.
Expected Results: Within 2-3 weeks, you'll spot stress patterns before burnout hits, train smarter, and recover faster — backed by data, not guesswork.
#Biohacking #HRV #Recovery #AthleteLife #PeakPerformance #Productivity #Focus #Efficiency #Health #Wellness #Energy #Recovery (3/3)
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a $99 Google Health subscription has been included with their Gemini AI service (along with 5TB cloud storage)
not sure the data being collected without user input is something a woman here in Texas might want ... given this state's new laws about pregnancy healthcare.
#HRV #heartRateVariability<screenshot> description in reply
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Has anyone been able to integrate a home #DVS (specifically not #HRV) with #HomeAssistant? I wouldn't mind some wiring or #soldering on the thing, but I haven't found any bus decoder yet.
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Heat Recovery Ventilator (HRV) — Operating Principle
A recuperator (heat recovery unit) transfers heat from exhaust air to incoming fresh air without mixing the two streams.
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How It Works
Two airflows:
Exhaust air (warm, from indoors)
Supply air (cold, from outside)
They pass through a heat exchanger:
separated by plates or channels
no direct mixing
heat transfers through the material (conduction)
Result: → supply air is preheated
→ exhaust air is cooled
→ overall heat loss is reduced---
Types of Recuperators
1. Plate Heat Exchanger
aluminum or plastic plates
efficiency: ~60–90%
no moving parts
2. Rotary (Wheel) Heat Exchanger
rotating drum
transfers heat and some moisture
efficiency: up to ~85–90%
3. Counterflow Heat Exchanger
air streams move in opposite directions
highest efficiency: up to ~95%
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What Is Transferred
heat (primary)
sometimes moisture (in enthalpy units)
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Efficiency Example
outside: 0°C
indoor: +22°C
after recovery: ~16–20°C
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Advantages
reduced heating energy demand
continuous ventilation without major heat loss
improved indoor air quality
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Limitations
frost formation in winter (needs bypass or preheater)
filter maintenance required
upfront cost
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Core Idea
A recuperator doesn’t generate heat — it recovers and reuses it.
#HVAC #HeatRecovery #HRV #ERV #EnergyEfficiency #Ventilation #IndoorAirQuality #AirExchange #HeatExchanger #SustainableLiving #GreenBuilding #EnergySaving #HomeComfort #SmartHome #BuildingEngineering #ClimateControl #EcoTech #Airflow #FreshAir #LowEnergy #PassiveHouse #NetZero #HomeImprovement #Engineering #CleanAir
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Went to doctor the other day regarding a medical issue, and when I raised #HRV as a possibly salient metric they had never heard of it and didn’t know what I was talking about, so there’s that, sports fans.
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Having a Cold with Garmin and Apple
Reading Time: < 1 minuteYesterday I woke up feeling tired and both Garmin and Apple said that I neded to rest. What I thought were allergies turned out to be a one day cold, I hope. According to the Apple Watch my HRV crashed down and in the evening I definitely had a cold/flu dream.
My dream, paradoxically, was sorting through a list of photos via checksum or some other technology. What I spent my waking hours doing made it into my dreams.
You can tell how under the weather I was, firstly by being too tired to go for the group ride, and not caring, and by the fact that I thought the First Saturday was yesterday when yesterday was the last saturday of the month. It shows that I wasn't in my plate, to use a French expression.
My sleeping heart rate sometimes drops to 38 or lower. Yesterday it was at 56 BPM. According to Suunto it was 61BPM and according to Garmin it was just 45 BPM. Which one should I trust? I'd say Garmin.
If we ignore the details and look at the trends then Suunto, Apple and Garmin saw that I was fighting something and told me that I should rest. I was sick enough to confuse next Saturday with yesterday. Luckily I didn't get to Geneva. That would have been a mistake.
If I felt good, then today I could have enjoyed a via ferrata. As I did not I stayed home. I want to rest today ahead of tomorrow's run. If I wake and devices tell me to rest I suspect I will.
And Finally
And finally, today I am toying with the idea of a real rest day. I will still walk, but a short half hour circuit.
#Apple #cold #form #Garmin #hrv #rest -
💓 Smartwatch study shows stadium atmosphere spikes heart rate and stress levels
https://phys.org/news/2026-02-smartwatch-stadium-atmosphere-spikes-heart.html
#sports #heart #hrv #stress #emotions #biosignals #smartwatch #football #soccer #stadium
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#OpenScience #OpenTeaching community,
yesterday, for the beginning of the exam season, I gave a lecture on stress management. To demo Respiratory Sinus Arrhythmia, I built a little tool to show real-time ECG + heart rate from a Polar H10 in the lecture hall.Students could see how breathing affects heart rate. The "aha!" moments were amazing : )
It now records and is available as FOSS:
https://github.com/RGreinacher/polar-h10-ecg-viewer -
I have an interesting problem. Our apartment lacks adequate ventilation and our co2 levels are always very high. I have a monitors in multiple rooms and at night with the door closed our bedroom is around 1600-2000+ppm. The recommended levels are under 1000ppm. For adults its not great, but my wife and I are expecting our first in March. Prolonged co2 levels above 1500ppm increased risk potential cognitive effects and 2000ppm is very unhealthy for infants. There aren't any laws or regulations around residential indoor air quality, so the apartment complex doesn't have to remedy the situation.
#CO2 #IndoorAir #AirQuality #CO2Monitoring #HRV #HVAC #DIY #ApartmentLiving #homeassistant
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💓 Are We Really Training at the Desired Intensity? Concurrent Validity of 16 Commercial Photoplethysmography-Based Heart Rate Monitors
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In case you missed it, Polar now shows breathing rate and HVR while you sleep, a good indicator for sleep apneia and heart problems!
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ATMO Shield: открытый инструмент для приватного мониторинга нервной системы на базе HRV и локального AI
Привет, Хабр! Я — независимый разработчик, и хочу рассказать о своём open-source проекте ATMO NeuroYoga ( https://play.google.com/store/apps/details?id=com.atmo.full ) — мобильном приложении для заботы о нервной системе. Текущая версия 1.4.1 уже доступна и включает упражнения NeuroYoga breathing и интерактивные точки акупрессуры. Но главная цель проекта — ATMO Shield , полностью оффлайн инструмент для непрерывного мониторинга и защиты нервной системы на основе вариабельности сердечного ритма (HRV).
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💗 Impact of Stereoscopic Technologies on Heart Rate Variability in Extreme VR Gaming Conditions
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So if you are using sleep HRV as an indicator of recovery there may be some issues. In my case a longer or better night’s sleep is correlated with lower HRV (SDNN). That suggests there is something going on that isn’t about recovery at all (and higher SDNN is only associated with parasympathetic predominance and may be open to all sorts if intervening factors). I have collected a lot of data.
Poor sleep itself is associated in my case with high day stress which does make sense.
I don’t think sleeping less or worse can be causally related with worse recovery in any sane world. High day stress may of course drive a night-time shift in HRV, which might be a thing.