How to set up Apple Watch for Long COVID: track resting heart rate and HRV without added strain
Which metrics matter for Long COVID - from resting heart rate and HRV to blood oxygen - and how to track them with minimal effort, plus how to prepare a report for your post-COVID clinic, GP, or insurance provider.
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With Long COVID, every bit of extra effort costs energy - including setting up new technology. This guide is intentionally short: set it up once, then it runs by itself. Sam reads your Apple Health data automatically in the background, so you don't have to hunt for the numbers.
The metrics that matter
For Long COVID, a few key signals stand out - and your Apple Watch captures all of them already:
- Resting heart rate as a trend. Not one morning reading, but how the number moves over days and weeks - compared to before your illness, or to your last few weeks.
- Heart rate variability (HRV). Again, the trend is what counts - especially how quickly HRV bounces back after more demanding days.
- Blood oxygen (SpO2), optional. Apple Watch Series 6 and later measures SpO2 as a snapshot, usually at night while you sleep - it's not a replacement for a clinical pulse oximeter, but it can be a useful reference point for some people.
Beyond those, your sleep duration and quality, plus your activity level, add context without you needing to log anything manually.
Setup in a few quick steps
- Wear your watch as usual. Apple Watch calculates resting heart rate and HRV automatically in the background once you wear it regularly - nothing you need to do.
- Turn on sleep tracking if you haven't already, so Sam can include sleep data.
- Connect Sam to Apple Health. You'll confirm once which data categories Sam can read - resting heart rate, HRV, sleep, and activity are enough.
That's it. Everything else runs passively in the background.
The report for your next appointment
Post-COVID clinic and fatigue centre appointments are often scarce and short. The past few weeks are harder to recall when you're dealing with fatigue and brain fog.
You create the monthly health report in Sam yourself - sleep, stress, activity, sick days and symptoms in one PDF, once enough days are logged. You can print it or show it on screen at your appointment, so the conversation can be grounded in specific weeks instead of rough memories. The same report can help when you're talking with your insurance provider or employer about your situation - as a reference point for that conversation, not as a medical certification or sick note.
If even the setup feels like too much
Sometimes there is no energy left for a one-time setup. That is OK. There is no hurry - the app will be there when you are ready, and nothing changes with your care in the meantime. If needed, ask someone you trust to help you set it up, rather than pushing yourself too hard.
Log symptoms and sick days in Sam and take the monthly report along
You bring a month of dated symptoms and Apple Health data to your appointment, which helps on days when remembering is hard.
- Instead of memory on a bad day: you pick symptoms such as fatigue, brain fog, dizziness or shortness of breath in the symptom diary and log your sick days.
- Instead of Apple Health alone: Sam reads resting heart rate, HRV, sleep and activity and shows them as trends over days, weeks and months.
- Instead of loose notes: the monthly report you create puts sleep, activity, stress, sick days and symptom days into one PDF once enough days are logged.
Long COVID has no program in Sam, so you use the diary and the report, as the Long COVID page shows.
Try Sam for freeSam is a wellness companion, not a medical device. Sam does not diagnose, treat, cure, or prevent any illness and does not replace medical advice. Sam reads your Apple Health data only after you grant access. You can revoke that access at any time in iOS settings. For health questions, always consult a qualified medical professional.
Related reading
Sources
- Apple Support: Monitor your heart rate with Apple Watch
- Charité Fatigue Centre: Post-COVID Syndrome with fatigue and exercise intolerance
- AWMF: S1 Guideline Long/Post-COVID Syndrome, Patient Version
More on Long COVID
Frequently Asked Questions
Do I really need an Apple Watch?+
No. Sam reads Apple Health and works with any wearable that syncs to it - Oura, Whoop, Garmin, and others. You just need an iPhone. If wearing a watch on your wrist feels uncomfortable, ring-based wearables like Oura are often easier to tolerate.
Do I have to check my numbers every day?+
No - and for Long COVID that matters. You do not need to check them daily. Your watch and iPhone collect the data automatically in the background, and Sam reads them from Apple Health.
How do I prepare a report for my post-COVID clinic?+
You create the monthly health report in Sam yourself, with pages on sleep, stress, activity, sick days and symptoms, and take it along as a PDF you can print or show on screen at your appointment. Since post-COVID clinic appointments are often hard to get and short, having concrete data from the past weeks can ground the conversation better than relying on memory.
What if even setting up feels like too much?+
That's a fair concern with Long COVID. The one-time setup takes a few minutes; after that it runs automatically. If even that is more than you have right now, ask a trusted person to help, or wait for a better day - there is no time pressure.
Can my Apple Watch tell me if I have POTS?+
No. The Apple Watch can show a trend of unusual heart rate rises when you stand up, but POTS (postural orthostatic tachycardia syndrome) is diagnosed only through a clinical stand test or tilt-table test by a doctor. If you notice recurring heart racing or dizziness when you stand, talk to your GP.
Can my Apple Watch track blood oxygen (SpO2) with Long COVID?+
Yes, with limits. Apple Watch Series 6 and later measures SpO2 as a snapshot, mostly during sleep, but not as accurately as a medical pulse oximeter. It's often useful for spotting everyday trends, but if you have ongoing breathing difficulties, that needs medical evaluation.
How can I show my insurance company or employer my Long COVID symptoms with data?+
The monthly health report you create in Sam, with pages on sleep, stress, activity, sick days and symptoms, can be taken along as a PDF and used as an additional reference point in conversations with your insurance provider or employer. The report isn't a medical certification or sick note, though - only your doctor can provide those.