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Sep 1, 2026 Inappropriate Sinus Tachycardia vs POTS: How to Tell Them Apart Both make your heart race, but the tell is timing. Inappropriate sinus tachycardia runs fast even at rest; POTS is normal lying down and surges when you stand. Here is how to read the difference at home without spiraling. POTS Aug 31, 2026 Why Are All My Test Results Normal When I Feel This Sick? Your ECG, bloodwork and echo came back normal, but you can barely stand up without your heart pounding. Here is why 'normal' and 'this sick' can both be true, what standard tests miss in dysautonomia, and the exact evidence to bring back to your clinician. POTS Aug 28, 2026 The Water Bolus for POTS: How Fast Drinking Water Raises Blood Pressure Drinking about 500 ml of plain water quickly can raise blood pressure and steady standing heart rate within minutes. Here is the physiology behind the water bolus, how to use it, and how to test whether it works for you. POTS Aug 27, 2026 Coat Hanger Pain: Why Your Neck and Shoulders Ache When You Stand Coat hanger pain is the aching band across the back of the neck and shoulders that builds the longer you stay upright and eases when you lie down. Here is why it happens in POTS and orthostatic intolerance, how to tell it apart from ordinary neck tension, and how to track it. POTS Aug 26, 2026 Ivabradine for POTS: How It Lowers Heart Rate Without Touching Blood Pressure Ivabradine slows the heart's own pacemaker directly, so it can bring down a racing standing heart rate in POTS without lowering blood pressure or blunting how hard the heart squeezes. Here is how it works, what the evidence shows, and what to actually track once it is in the picture. POTS Aug 25, 2026 Air Hunger in Long COVID and POTS: Why You Feel Short of Breath Air hunger, the feeling that you can't get a full, satisfying breath, is one of the most frightening symptoms in long COVID and POTS. It usually isn't your lungs failing. Here is what actually drives it, why your oxygen reads normal, and how to track it without spiraling. Long COVID Aug 24, 2026 Tilt Table Test: What to Expect and How It Diagnoses POTS and Syncope A tilt table test tips you upright on a motorized table while your heart rate and blood pressure are watched continuously. Here is what actually happens during the test, how it is read, and how it differs from the stand test you can run at home. POTS Aug 23, 2026 Heart Palpitations and Ectopic Beats in POTS: What They Mean and How They Affect HRV Palpitations, that pounding, fluttering or skipped-beat feeling, are one of the most common and most frightening symptoms in POTS and long COVID. Here is what the different sensations actually mean, why most are benign, the red flags that are not, and how ectopic beats quietly distort your HRV readings. POTS Aug 22, 2026 Small Fiber Neuropathy in POTS and Long COVID: Symptoms, Testing, and What to Track Small fiber neuropathy damages the tiny nerves that carry pain, temperature and autonomic signals, and it shows up surprisingly often in POTS and long COVID. Here is what it feels like, how it is tested, and the at-home metrics that mirror the autonomic side of it. POTS Aug 21, 2026 Vasovagal Syncope: Why You Faint and How to Stop It Vasovagal syncope is the most common reason people faint: a reflex that briefly drops your blood pressure and heart rate so your brain loses blood flow for a few seconds. Here is what the reflex is doing, how to read the warning signs, and the counter-pressure moves that can stop a faint before it lands. Basics Aug 20, 2026 Respiratory Sinus Arrhythmia: Why Your Heart Rate Rises and Falls With Each Breath Respiratory sinus arrhythmia is the normal, healthy way your heart speeds up as you breathe in and slows as you breathe out. It is the single biggest source of your beat-to-beat HRV, and understanding it explains why slow breathing raises your numbers. HRV Aug 19, 2026 Cortisol and HRV: How Your Stress Hormones Shape Heart Rate Variability Cortisol is your main long-acting stress hormone, and it runs on a daily rhythm that shapes your heart rate variability. Here is how the two connect, why HRV is lowest in the morning, and what a flattened cortisol curve means for POTS and long COVID recovery. HRV Aug 18, 2026 Orthostatic Hypotension vs POTS: How to Tell Them Apart Both make you dizzy when you stand up, but they are opposite problems on the monitor. Orthostatic hypotension is a blood-pressure drop; POTS is a heart-rate surge with the blood pressure holding. Here is how to read the difference at home without spiraling. POTS Aug 17, 2026 Cold Exposure and HRV: Does Cold Water Really Boost Your Vagus Nerve? Cold water can calm your heart through the vagus nerve, but only in a specific way. Cold on the face triggers a genuine vagal slowdown; a full ice plunge is a sympathetic stressor first. Here is what actually happens to your HRV, and how to try it safely with POTS. HRV Aug 16, 2026 Low Blood Volume in POTS: How Hypovolemia Drives the Racing Heart Many people with POTS run on a genuinely smaller blood volume than average. Here is the physiology behind hypovolemic POTS, why it drives the standing tachycardia and low HRV, and the at-home fingerprints you can actually track. POTS Aug 15, 2026 Hypermobility, hEDS and POTS: Why Bendy Joints and a Racing Heart Travel Together Joint hypermobility, hypermobile Ehlers-Danlos syndrome (hEDS) and POTS overlap far more often than chance. Here is the connective-tissue link, what the Beighton score does and does not tell you, and how tracking changes the management. POTS Aug 14, 2026 How Long Should You Measure HRV? Reading Length, Explained How long to measure HRV depends on which metric you care about and how consistent you want your trend to be. Ultra-short 1-minute readings can track vagal tone, but the classic 5-minute reading is the reference standard, and mixing lengths quietly breaks your baseline. Here's how to choose one length and stick to it. HRV Aug 13, 2026 Dehydration and HRV: Why Being Under-Hydrated Lowers Heart Rate Variability Under-hydration is one of the quietest reasons your HRV reads low. Here is the physiology behind it, how much it moves the number, why it hits harder in POTS, and how to tell a hydration dip apart from a real trend. HRV Aug 12, 2026 Weather and POTS: How Barometric Pressure, Humidity, and Cold Shift Your Symptoms Many people with POTS and dysautonomia swear their symptoms track the weather, and the physiology backs up a lot of it. Here is what barometric pressure, humidity, cold snaps, and passing fronts actually do to an autonomic nervous system, and how to tell whether the sky is really your trigger. POTS Aug 11, 2026 Clean Days and Protocol Streaks: Tracking What You Control A clean day is one that met the protocol you set for yourself. Autonomic counts your current streak and the share of the last 30 days that stayed clean. Here is why compliance is the right thing to measure in autonomic recovery, how to set a protocol you can actually hit, and why a broken streak is data rather than failure. Recovery Aug 11, 2026 Heart Rate Zones Explained: Z1 to Z5, and How to Read Them With Dysautonomia Heart rate zones split effort into five bands off your estimated maximum heart rate. Here is what each zone actually does physiologically, why the age formula is only an estimate, and how to read time-in-zone when you have POTS, long COVID or post-exertional malaise. Recovery Aug 11, 2026 Overnight Heart Rate: What Your Sleeping Low and High Reveal Your overnight low is the cleanest resting heart rate you will ever get: no posture, no caffeine, no white-coat effect. Here is when in the night it happens, what the overnight high reflects, and why a rising low is one of the earliest warnings you have. Basics Aug 11, 2026 Sleep Apnea and HRV: Why It Keeps Your Nervous System on Edge Undiagnosed sleep apnea is one of the most common hidden reasons HRV stays stuck low and morning heart rate runs high. Here is the physiology, how it shows up in your own overnight and morning numbers, and why the POTS and long COVID crowd gets missed. HRV Aug 10, 2026 Baroreflex Sensitivity: The Reflex That Keeps You Upright The baroreflex is the fast feedback loop that steadies your blood pressure every time you stand, and its sensitivity is one of the clearest measures of how well your autonomic system responds. Here is what baroreflex sensitivity means, why it runs low in POTS and long COVID, and how your HRV and stand test give you a home-usable proxy. Basics Aug 9, 2026 POTS vs Deconditioning: How to Tell the Difference "You're just deconditioned" is one of the most common things people with POTS hear. Both can race your heart when you stand, but they behave differently over time. Here is how to read the difference at home without talking yourself out of care. POTS Aug 8, 2026 The Poincaré Plot in HRV: What SD1 and SD2 Actually Show The Poincaré plot turns your heartbeat intervals into a scatter of dots, and its two descriptors, SD1 and SD2, summarize the shape. SD1 is your fast, vagal beat-to-beat change; SD2 is your overall variability. Here's how to read the cloud and the numbers. Basics Aug 7, 2026 From Daily Crashes to Living Again: What I Tracked, What I Changed, and What the Data Showed A patient-founder's honest account of four years with long COVID and dysautonomia: the daily crashes and labile blood pressure, why I started measuring, the routine I built piece by piece, and what my own HRV and blood pressure data actually showed. Long COVID Aug 7, 2026 Magnesium, HRV and POTS: Does It Actually Help, and How to Tell Magnesium is one of the most recommended supplements in POTS and long COVID circles, usually for sleep, palpitations and calmer nerves. The evidence for a direct HRV boost is modest, but the indirect route through better sleep is real. Here is the honest picture, the forms that actually differ, the blood-pressure caution POTS makes important, and how to test whether it helps you. Food Aug 6, 2026 Iron Deficiency and POTS: Why Ferritin Matters When Your Labs Look Normal Low iron stores are common in POTS and can quietly amplify tachycardia, fatigue and lightheadedness, often while a standard blood count still reads normal. Here is how ferritin fits in, why the lab range can miss it, and what to track at home. POTS Aug 5, 2026 Compression Garments for POTS: What Actually Works and How to Wear Them Compression is one of the few non-drug tools with real evidence behind it for POTS. The catch: where you compress matters far more than most people realize. Here is what the research shows and how to use it. POTS Aug 4, 2026 HRV Baseline: How to Build One and Read Every Reading Against It A single HRV number means almost nothing on its own. Your baseline, your own rolling average and the normal spread around it, is what turns each morning reading into a signal you can actually trust. Here is how to build one and how to read today against it. HRV Aug 3, 2026 Heart Rate Recovery After Exercise: What the Drop Tells You Heart rate recovery is how fast your pulse falls in the first minute after you stop moving. It is one of the clearest windows onto vagal reactivation, the parasympathetic system switching back on. Here is how to measure it, what a good drop looks like, and how to read it if you have POTS or long COVID. Basics Aug 2, 2026 Is It POTS or Anxiety? How to Tell Them Apart POTS and anxiety share almost every symptom: racing heart, dizziness, shortness of breath, that wired feeling. The one thing that reliably separates them is what your heart does when you stand up. Here is how to read the difference without spiraling. POTS Aug 1, 2026 Why Is My HRV Low? Causes of Low Heart Rate Variability A low HRV reading rarely means something is wrong on its own. Here are the everyday causes of low heart rate variability, the condition-related ones, and how to tell a meaningless one-day dip from a trend worth watching. HRV Jul 31, 2026 Beta Blockers and HRV: Why Your Heart Rate Variability Changes on Propranolol or Metoprolol Starting a beta blocker usually lowers your resting heart rate and pushes your HRV numbers up, but part of that rise is the slower heart rate itself, not healed vagal tone. Here is how to read RMSSD, SDNN and your stand test honestly once a beta blocker is in the picture. HRV Jul 30, 2026 Why Does HRV Drop When You're Getting Sick? Reading the Early Warning A day or two before the sore throat or the fatigue, your heart rate variability often dips and your resting heart rate creeps up. Here is why an infection pulls HRV down, how to tell an illness dip from an ordinary bad night, and how to use the signal to rest instead of push. HRV Jul 30, 2026 Quercetin and Mast Cells: What the Evidence Actually Shows Quercetin is the most recommended supplement in MCAS and long COVID circles, and the laboratory data on mast cells is genuinely impressive. The human data is much thinner, and there is a large gap between the concentrations that work in a dish and the ones your blood can reach. Here is the honest picture, the safety and interaction issues worth knowing, and how to run a careful trial with your clinician. Food Jul 29, 2026 Blood Pooling in POTS: Why Blood Collects in Your Legs When You Stand (and What Helps) When you stand, gravity pulls a large volume of blood down into your legs and belly. In POTS that pooling is exaggerated and slow to correct, so your heart races to compensate. Here is the physiology in plain terms, why your feet can turn dusky, and the practical moves that push blood back where it belongs. POTS Jul 28, 2026 Why Are POTS Symptoms Worse in the Morning? The Overnight Physiology and a Gentler Start If your POTS symptoms are at their worst in the first hour after waking, there are real, well-understood reasons. Here is what happens to your blood volume, hormones and heart rate overnight, and a calmer, step-by-step way to get out of bed. POTS Jul 27, 2026 Long COVID Brain Fog: The Autonomic Connection (and How to Track the Pattern) Long COVID brain fog is not just fatigue in disguise. A large part of it tracks with your autonomic nervous system, especially how your body handles being upright. Here is the physiology in plain language, and how to find your own pattern. Long COVID Jul 26, 2026 How to Stimulate the Vagus Nerve: What Actually Works (and What's Overhyped) The vagus nerve is the main line of your parasympathetic 'rest and digest' system, and its activity shows up directly in your HRV. Here is what genuinely raises vagal tone, what is plausible but oversold, and how to tell which is which using your own numbers. HRV Jul 25, 2026 The Best HRV Chest Strap: Polar H10 vs COOSPO H808S A chest strap is the single biggest upgrade you can make to your HRV data. We tested the Polar H10, the research gold standard, against the far cheaper COOSPO H808S. Both are good. Here is where they differ and which one to buy. HRV Jul 25, 2026 Why POTS Feels Worse After Eating: Postprandial Hypotension, Explained If your heart races, your head swims, or you crash for an hour after a meal, that is not in your head. Digestion pulls a large share of your blood into the gut, and a struggling autonomic system cannot compensate. Here is the physiology and how to eat around it. POTS Jul 24, 2026 HRV Normal Range by Age: What Counts as a Good Score? Heart rate variability falls with age and differs by sex, so there is no single 'good' number. Here are the realistic HRV ranges by age, why the bands overlap so heavily, and why your own baseline tells you far more than any chart. HRV Jul 23, 2026 POTS Subtypes Explained: Hyperadrenergic, Neuropathic, and Hypovolemic POTS is usually grouped into three overlapping patterns: neuropathic, hyperadrenergic, and hypovolemic. Here is what each one means, how they differ, and what your at-home stand-test numbers can hint about which pattern is driving your symptoms. POTS Jul 23, 2026 See Your Nervous System Recover Dysautonomia is invisible, and that's half of what makes it so hard: you can't see the illness, and you can't see the recovery either. Autonomic is the app that makes recovery visible: HRV, blood pressure, stand tests and sleep, scored, trended, and kept private on your phone. The app Jul 22, 2026 Adrenaline Dumps in POTS: Why Your Heart Races (and Why It Usually Isn't a Panic Attack) That sudden racing heart, tremor and wave of dread, often at 3am or after standing, has a name patients use: an adrenaline dump. Here is the physiology behind catecholamine surges in POTS, how to tell them apart from panic attacks, and how to track and settle them. POTS Jul 21, 2026 Heat Intolerance and POTS: Why Hot Weather Wrecks Your Numbers (and How to Track It) Heat is one of the most reliable triggers in POTS and dysautonomia. Here is the physiology behind why hot weather raises your heart rate, drops your HRV, and worsens standing symptoms, plus the practical cooling and tracking moves that actually help. POTS Jul 20, 2026 Alcohol and HRV: Why a Few Drinks Lower Your Overnight Numbers (and Flare POTS) Unlike caffeine, alcohol reliably lowers your overnight HRV, and the effect scales with how much you drink and how late. Here is the physiology, honestly, plus why it hits POTS and dysautonomia harder, and how to test your own response. HRV Jul 19, 2026 The Menstrual Cycle and HRV: Why Your Numbers Dip (and POTS Flares) Before Your Period HRV tends to run higher in the follicular half of your cycle and lower in the luteal half, while resting heart rate does the opposite. Knowing where you are in your cycle keeps a normal luteal dip from reading like a crash, and explains why POTS symptoms so often flare before and during your period. HRV Jul 18, 2026 Caffeine and POTS: How Coffee Affects Your Heart Rate, HRV, and Standing Symptoms Does coffee make POTS worse? Caffeine is a stimulant that raises heart rate and sympathetic drive, but it can also nudge blood pressure up and its effect on HRV is genuinely individual. Here is the physiology, honestly, plus how to test your own response. POTS Jul 9, 2026 Autonomic BP Indices: Kérdő, Robinson & Kvas From three simple numbers (systolic, diastolic and pulse) you can derive several older physiology indices that read autonomic balance and cardiovascular efficiency. They are research tools, not clinical verdicts, so their value is in your own trend. Here is what each one means and how to read it. Basics Jul 9, 2026 Blood Pressure Basics: Systolic, Diastolic & Pulse The three numbers on a blood-pressure reading each tell a different story: systolic is the peak as your heart contracts, diastolic is the resting pressure between beats, and pulse is how fast it all repeats. Here is what each one means and how a recovery-focused reading differs from the clinical chart. Basics Jul 9, 2026 How to Measure HRV Accurately at Home The secret to at-home HRV isn't an expensive device: it's consistency. Same time, same posture, same length, every day. Here's how to take readings you can actually trust, why the trend matters more than any single morning, and how to stop fooling yourself with noise. Basics Jul 9, 2026 HRV: The Complete Guide to Reading Your Nervous System Heart rate variability is the single clearest at-home window into your autonomic nervous system. This is the complete guide: what RMSSD, SDNN, HF and LF actually mean, what moves them, how to measure well, and how to read the trend without spiraling. HRV Jul 9, 2026 HRV Frequency Domain: VLF, LF, HF & Total Power Explained Your heartbeat rhythm can be split into frequency bands, each reflecting a different piece of autonomic regulation. Here's what HF, LF, VLF and total power actually mean, why the mix matters more than the total, and how to read the LF/HF ratio without over-trusting it. Basics Jul 9, 2026 HRV Histogram Metrics: Mode, AMo50, MxDMn and CV Mode, AMo50, MxDMn and CV are the geometric HRV metrics: four different reads on the shape of your heartbeat-interval histogram. They're the raw ingredients behind the Baevsky stress index. Here's what each one describes and how to grade it. Basics Jul 9, 2026 LF Peak, HF Peak, Coherence & Resonance Breathing Frequency-domain HRV isn't only about how much power sits in each band: it's about where the power concentrates. Here's what the LF and HF peaks mean, why paced breathing pulls them into place, and how resonance-frequency breathing at about six breaths a minute maximizes your HRV. Basics Jul 9, 2026 Mean Arterial Pressure & Pulse Pressure, Explained Systolic over diastolic is only the start. Two derived numbers, mean arterial pressure and pulse pressure, often say more about how well your circulation is actually perfusing your organs, and both are quietly informative in POTS and orthostatic intolerance. Basics Jul 9, 2026 PNS Index, SNS Index & Stress Index: The Balance Trio Three numbers the app shows side by side to describe autonomic balance: the PNS index (your rest-and-recover side), the SNS index (your fight-or-flight side), and the Baevsky stress index. Here's what each one means and how they move together. Basics Jul 9, 2026 Resting Heart Rate & Mean RR: Your Simplest Autonomic Signal Resting heart rate is the plainest read on your autonomic load, and a creeping baseline is often the first sign of a bad stretch. Here's why position changes the number, how mean RR is the same information seen from beat-to-beat space, and how to read a rising resting HR in POTS recovery. Basics Jul 9, 2026 RMSSD and pNN50: Your Two Vagal-Tone Metrics, Explained RMSSD and pNN50 are the two time-domain numbers that track vagal tone, the parasympathetic 'rest and digest' side of your nervous system. RMSSD is the cleanest day-to-day recovery signal you have. Here's what each one means and how to read them. Basics Jul 9, 2026 RR Intervals & the Tachogram: The Raw Data Behind HRV Every HRV number you'll ever see is built from one simple series: the time in milliseconds between your heartbeats. This is the plain-language explainer for RR intervals, the tachogram that plots them, and why a healthy trace looks like rolling waves rather than a flat line. Basics Jul 9, 2026 The Autonomic Score & Grade Bands: One Number, Explained Every colored tint in the app traces back to one system: a 0–100 readiness score and a ladder of grade bands from Excellent down to Crash, plus a violet Warning flag for readings that are suspiciously high. Here's how raw metrics become a single number, and how to read it without over-trusting it. Basics Jul 9, 2026 What Is SDNN in HRV? Your Total Variability, Explained SDNN is the broadest single HRV number: the standard deviation of the gaps between your heartbeats. Here's what it measures, why short readings run lower than the figures you see quoted, and how to read it as a recovery signal. Basics Jul 7, 2026 What the Latest Research Says About Long COVID & Dysautonomia (2026) An honest read on where the science stands in 2026: long COVID and ME/CFS increasingly look like related post-viral illnesses with measurable autonomic dysfunction, and the evidence is converging on why. Research Jul 7, 2026 Recovery from Post-Viral Dysautonomia: Turning Data Into Decisions Recovery from POTS and post-viral dysautonomia is slow, noisy and non-linear, which is exactly why it's so easy to lose hope in the day-to-day. Here's how to pace, read your trends, and turn months of scattered data into decisions that actually bend the curve. Recovery Jul 6, 2026 Gentle Low-Histamine Meal Ideas for Bad POTS Days A crash-day toolkit of low-effort, lower-histamine meals that also respect POTS: salt-forward, easy to digest, and cookable with minimal standing. Idea lists, not fussy recipes, with one habit that changes everything: cook fresh, freeze fast. Food Jul 5, 2026 Getting Started with Autonomic: Your First Week of Tracking A friendly, low-effort plan for your first seven days. Set a baseline, build a simple morning habit, and learn what to ignore while your data is still finding its feet. The app Jul 5, 2026 POTS, Long COVID & MCAS: Why They Travel Together POTS, long COVID, ME/CFS and MCAS overlap so much that many people are told they have several at once. Here's what actually connects them, how they differ, and which parts of each you can track at home. Long COVID Jul 3, 2026 Autonomic: Measure, Analyze, Monitor, Act Everything about autonomic recovery comes down to one loop: measure what's happening, analyze the trend, monitor for warnings, and act. Autonomic is the app built to close that loop: private, offline, and scored against medical thresholds. The app Jul 3, 2026 The Mediterranean Diet for Long COVID: What Evidence Shows Long COVID involves persistent, low-grade inflammation, and the Mediterranean pattern is one of the most anti-inflammatory ways to eat. Here is what the 2025 evidence actually shows, and how to start without overwhelming yourself. Food Jul 2, 2026 The Autonomic Nervous System & Dysautonomia: A Complete Guide Your autonomic nervous system runs everything you never think about: heart rate, blood pressure, digestion, temperature. When it stops regulating properly, that's dysautonomia. Here is how it works, what goes wrong, and why it's measurable. Basics Jul 1, 2026 What Recovery Actually Looks Like: The Non-Linear Curve Recovery from post-viral dysautonomia and POTS is real but slow, and it almost never moves in a straight line. Here is what the honest timeline looks like, why plateaus mislead you, and what to watch instead of the daily noise. Recovery Jun 30, 2026 The Best Wearables & Home Tools for Tracking POTS A practical guide to the affordable devices that capture POTS at home (chest straps, rings, watches, blood-pressure cuffs and pulse oximeters), plus the one test that needs no gadget at all. POTS Jun 27, 2026 Is It Long COVID or POTS? How to Tell Them Apart Long COVID and POTS are not competing labels: one is a broad umbrella and the other a specific, measurable diagnosis that often sits inside it. Here is how to tell what you are actually dealing with. Long COVID Jun 25, 2026 Resonant Breathing & HRV Biofeedback: The 6-Breaths-a-Minute Protocol Slowing your breath to about six breaths a minute is one of the few things that reliably raises HRV in real time. Here is the mechanism, a concrete protocol, and honest caveats for sensitive nervous systems. HRV Jun 23, 2026 SIBO, Histamine & Why Dysautonomia Wrecks Digestion Dysautonomia doesn't stop at your heart rate, it slows your gut, invites bacterial overgrowth, and can stir up histamine problems. Here is how POTS, SIBO and MCAS feed each other, and the dietary tools that actually help. Food Jun 22, 2026 Does HRV Biofeedback Work for Long COVID? The Evidence Slow resonant breathing is one of the gentlest things you can try for long COVID dysautonomia. Here is what the actual studies found, where they fall short, and how to judge whether it is worth your energy. Research Jun 20, 2026 Sleep and Autonomic Recovery: Your Biggest Daily Lever Most of your parasympathetic restoration happens overnight, which makes sleep the single biggest lever you have on autonomic recovery. Here is how dysautonomia disrupts it, and gentle, realistic ways to sleep better. Recovery Jun 18, 2026 How to Improve Your HRV: What Actually Works (and What Doesn't) The honest, evidence-based guide to raising heart rate variability, ranked by real-world impact. Sleep and pacing beat any gadget, and in post-viral illness HRV mostly rises as the underlying dysregulation heals. HRV Jun 16, 2026 The Low-Histamine Diet for MCAS: A Practical Food List A low-histamine diet can calm the flares of MCAS and histamine intolerance by lowering your total histamine load. Here is a practical eat-versus-avoid list, the freshness rule that matters most, and why this is a short-term tool, not a way of life. Food Jun 15, 2026 Autonomic vs. Fitness Trackers: Built for Recovery, Not Performance Fitness trackers are built for healthy people chasing performance. When you are recovering from POTS or long COVID, that framing can quietly mislead you. Here is what a recovery-first tool does differently. The app Jun 13, 2026 What Causes Long COVID? Microclots, Neuroinflammation & Autonomic Injury The leading 2026 theories for what drives long COVID overlap rather than compete: persistent inflammation, microclots, small-fiber nerve damage, autoantibodies and autonomic injury. Here is what each one may explain about how you feel. Long COVID Jun 11, 2026 POTS Treatment: Salt, Fluids, Compression & Medication Explained POTS treatment usually starts with volume, compression and a careful exercise ramp, and adds medication when those aren't enough. Here's how each piece works and why it's almost always a combination. POTS Jun 9, 2026 The POTS Diet: What to Eat, and Why Small, Salty Meals Help There is no single POTS diet, but a few patterns reliably help: smaller and more frequent meals, generous sodium and fluids, and steady blood sugar. Here is what to eat, what tends to backfire, and why. Food Jun 8, 2026 How Accurate Are Consumer HRV Wearables? The Evidence Chest straps, rings and watches don't measure your nervous system equally. Here is what peer-reviewed validation studies actually show about HRV accuracy, and why consistency matters more than a perfect number. Research Jun 6, 2026 Pacing 101: How to Find and Expand Your Energy Envelope Pacing is the single most important recovery skill for POTS, long COVID and ME/CFS. Here is how to find the edge of your energy envelope, stop the boom-and-bust cycle, and expand your capacity without triggering a crash. Recovery Jun 4, 2026 Why Your HRV Dropped Overnight: Reading the Daily Number You checked your morning HRV and it cratered. Before you spiral, here is what actually moves a single reading, why one day is mostly noise, and how to read the rolling trend that really matters. HRV Jun 2, 2026 How Autonomic Scores Your Readings Against Medical Thresholds A raw HRV or heart-rate number means almost nothing on its own. Here is how Autonomic turns each reading into a grade zone, scored against recovery-relevant thresholds and your own rolling baseline. The app May 30, 2026 The Best Way to Measure HRV at Home: Straps, Rings, Watches Chest straps, finger rings and wrist watches all measure HRV differently, and their accuracy varies more than the marketing suggests. Here is what the validation research shows, and why consistency beats precision every time. HRV May 28, 2026 Salt & Fluids for POTS: What's Proven and What Isn't "Drink more, salt more" is the most repeated advice in POTS. Here is the physiology behind it, what the evidence actually supports, and where the guidance runs ahead of the data. Research May 28, 2026 What HRV Actually Is, And Why It Matters for POTS Recovery Heart rate variability is one of the clearest windows into your autonomic nervous system. Here is what it measures, why it drops in POTS and post-viral illness, and how to read it without obsessing. HRV May 26, 2026 How to Find Your Triggers With a Symptom Journal Scattered logs rarely reveal what sets off a crash. Here is how to keep a symptom journal that turns daily notes into cause-and-effect, including the delayed reactions that make triggers so hard to spot. Recovery May 23, 2026 Exercise for POTS: The Levine Protocol & How to Start Safely Upright exercise often backfires early in POTS. The recumbent-first approach (the Levine and CHOP protocols) trains your heart lying down first, then works toward standing over months. Here is how to start without crashing. POTS May 21, 2026 The Orthostatic Stand Test: How to Do It at Home (and What the Numbers Mean) The lying-to-standing heart rate test is the single most useful at-home measurement for POTS. Here is how to run it consistently and how to read the rise and recovery. POTS May 21, 2026 Why You Feel Better at Night With MCAS (and Why Late Nights Still Cost You) That window between 10pm and 1am where the symptoms lift and you finally feel like yourself is real physiology, not avoidance. Here is what actually produces it, why the relief is borrowed rather than earned, and how to keep the good part without paying for it three days later. Recovery May 19, 2026 Post-Exertional Malaise: What Long COVID Recovery Depends On Post-exertional malaise is the delayed, disproportionate crash after exertion that defines ME/CFS and shadows long COVID. Here is why the delay makes it dangerous, why pushing through backfires, and how to see it coming. Long COVID May 16, 2026 Long COVID Symptoms That Point to Dysautonomia Racing heart on standing, dizziness, brain fog, exertion crashes and temperature swings after COVID often share one root: a dysregulated autonomic nervous system. Here is how to recognize the pattern and what to do next. Long COVID May 14, 2026 Turn Months of Data Into a Five-Minute Doctor Conversation Appointments are short and symptoms are hard to describe from memory. Here is how to use your own tracked data to walk in with a clear, specific summary your clinician can act on. Recovery May 12, 2026 Why We Built Autonomic Offline-First: Privacy as Architecture Health data is some of the most sensitive information you own, yet most apps ship it to the cloud. Autonomic keeps everything on your iPhone. Here is why that is a design choice, not a settings toggle. The app May 9, 2026 How POTS Is Diagnosed: The 30-BPM Rule, the Tilt Table & What to Expect POTS is diagnosed by a sustained heart-rate rise on standing without a big blood-pressure drop, symptoms lasting months, and other causes ruled out. Here is what the criteria mean and what the tests feel like. POTS