Orthosomnia explained: Can wearables really make sleep worse?
Orthosomnia refers to when sleep data damages sleep through anxiety – and it's a real phenomenon. We explain when orthosomnia is real and how to avoid …
Oct 28, 2026
What is invert sugar and its effect on blood sugar explained
If you've spotted "invert sugar" on an ingredient label and wondered if it's worse than regular sugar, Ultrahuman Medical Director Mukul Mittal …
Oct 21, 2026
A1C explained: Normal range chart and the limitations of A1C explained
What does your A1C number really mean? Use our A1C-to-glucose chart to understand your results, where the test misleads, and how CGM fills the gaps.
Oct 19, 2026
What's a normal HRV for men and women – based on 510,000 Ring users
If you're wondering what a normal HRV is for men and women, we analysed heart rate variability data from 510,000 Ring users to find out.
Oct 16, 2026
5 ways to lower your resting heart rate
A lower resting heart rate is a sign of good fitness. We explain how to lower RHR – both short term and your long term baseline
Oct 15, 2026
What's a normal sleeping heart rate by age – from 532,000 Ultrahuman users
See how sleeping heart rate varies by age across 532,000 Ring AIR users, what raises or lowers it and when a lasting change may warrant attention.
Oct 15, 2026
If you wake up at 3 AM regularly, use our matrix to find out why
If you find yourself waking at 3AM regularly, it could be your metabolism. Use our guide and matrix to help find out why
Oct 14, 2026
What causes bloating – and what actually helps
Bloating from diet, lifestyle and health conditions can disrupt daily life. Explore 24 proven, science-backed ways to reduce bloating and ease the …
Oct 09, 2026
The one thing people get wrong about cold immersion therapy
We explain the science behind cold therapy, and the misconception that could be costing you gains
Oct 09, 2026
Protein deficiency: 8 signs your body needs more protein
Discover eight common signs your body needs more protein, from constant cravings to fatigue, and learn how much protein you really need each day.
Oct 08, 2026
PMOS, cycle tracking and wearables explained
Wearables can't diagnose PMOS – but awareness of your body can inform better conversations with your doctor
Oct 07, 2026
Period symptoms: What's normal and when to be concerned
Learn which period symptoms are normal, from cramps to mood changes, and which signs like heavy bleeding or severe pain deserve clinical evaluation.
Oct 01, 2026
The cost of shift work on sleep and health – and tips for better sleep
Shift work wrecks sleep, and can lead to more serious Shift Work Sleep Disorders, as well as heightened risks of cardiac events and stroke. We explore …
Sep 30, 2026
How sleep affects heart health – and the surprising cost of long sleep revealed
Discover how poor sleep affects your heart health, why sleep deprivation is linked to cardiovascular disease, and why rest matters as much as diet and …
Sep 25, 2026
Reactive hyperglycemia in non-diabetics explained
Understand non-diabetic hyperglycemia, what causes high blood sugar in people without diabetes, and ways to lower and control blood glucose
Sep 23, 2026
Parasympathetic vs sympathetic explained – and how to activate 'rest and digest'
Learn how your parasympathetic and sympathetic nervous systems balance rest and stress, and how to shift into recovery mode to feel calmer on demand.
Sep 22, 2026
How to get more deep sleep: 9 science-backed changes to try tonight
If you want more deep sleep, Ultrahuman Medical VP Dr. Mukul Mittal walks you through 9 evidence-backed tactics
Sep 22, 2026
How smart rings track the menstrual cycle – and are they accurate?
We explain why smart rings have become key trackers for the menstrual cycle and compare to calendar and basal temperature tracking.
Sep 21, 2026
How the Ultrahuman Ring tracks cycle temperature
The Ring reads skin temperature continuously overnight and reports deviation from your own baseline. How that works, how accurate it is, and where it …
Sep 21, 2026
Basal Body Temperature (BBT) explained
What basal body temperature is, how it shifts across your cycle, how to chart it properly, and what a missing temperature rise means.
Sep 21, 2026
How to get more REM sleep explained
What REM sleep does, how much you actually need, and the habits that measurably increase it – based on sleep-stage data from Ultrahuman Ring members. …
Sep 19, 2026
REM sleep explained: Discover what causes low REM nights
What REM sleep is, what it does, how much is normal by age, and the most common cause of lost REM
Sep 16, 2026
Why a late bedtime still leaves you tired – even after 7 hours' sleep
Going to bed after midnight can still leave you tired, even with a full night's sleep. It's all to go with your circadian rhythm
Sep 15, 2026
VO2 Max explained: Why it's the leading predictor of long-term health
VO2 max measures how well your body uses oxygen during hard exercise, and it's one of the strongest predictors of long-term health there is.
Sep 14, 2026