James on Ultrahuman Blog

HRV Chart By Age: 528,000 Ring Users' Heart Rate Variability Compared

Thu, 21 May 2026 18:24:38 +0000

Heart rate variability (HRV) is one of the core signals wearables like the Ultrahuman Ring use to assess recovery and physiological stress.

HRV is highly individual, but it follows population-level patterns. It typically declines with age, from a median of 47ms in adults in their 20s to around 34ms by the 60s.

Direct comparison against other people isn’t clinically meaningful, but many people want reassurance that their numbers fall within a normal range. This guide provides that orientation and reveals how to read your own HRV properly.

New study reveals that your wearable knows how you slept better than you do

Tue, 19 May 2026 19:21:58 +0000

A new peer-reviewed study using the Ultrahuman Ring AIR has found a striking gap between how people think they sleep and what their body is actually doing.

The study, published this month in the Journal of Circadian Rhythms , was led by Matthew Driller and colleagues, an independent research group that used Ring AIR devices as an objective measure of sleep quality, after validating its accuracy against gold standard sleep-lab devices.

Why sleep consistency is the biggest lever for health you're not using

Tue, 19 May 2026 19:16:06 +0000

For decades, the public health advice on sleep has been a single number: seven to eight hours. But a new study by Ultrahuman , developed with Stanford University’s Snyder Lab, Bangor University’s Hans-Peter Kubis, and La Trobe University’s Driller Lab, suggests that might only be half the story.

The bigger lever might be consistency — going to bed at roughly the same time each night, with the study highlighting potential metabolic benefits that could offer a myriad of health and longevity benefits.

How an inconsistent sleep schedule takes its toll on your body

Wed, 06 May 2026 18:42:23 +0000

Most sleep advice obsesses over eight hours, but a growing body of research suggests that when you sleep is just as important as the duration.

New data from 103,490 Ultrahuman Ring AIR users backs that up. The research carried out by Ultrahuman’s Science team found that the least consistent sleepers had overnight resting heart rates 2–4 bpm higher than the most consistent ones.

It sounds like a small number, but an elevated overnight heart rate points to a higher physiological load – the body running warmer, working harder, and recovering less, even while you sleep.

Full circle: Ultrahuman returns to Kickstarter with special Ring PRO bundle

Mon, 04 May 2026 17:47:58 +0000

Ultrahuman is returning to Kickstarter with an exclusive Ring PRO bundle for the community that backed us first.

Four years ago, our original Kickstarter backers championed the Ring AIR and the philosophy behind it — that your health data belongs to you, with no subscription required.

Today, that same community gets special access to the Ultrahuman Ring PRO – our most advanced wearable yet, which boasts the longest battery life on any smart ring – with savings of up to 43%.

Introducing the Ultrahuman Ring PRO: Performance by design

Fri, 27 Feb 2026 22:31:26 +0000

Ultrahuman has unveiled Ring PRO — the third-generation smart ring designed for people who demand more from their wearable devices.

This isn’t a minor refresh. Ring PRO defines what uninterrupted health tracking should actually feel like, with incredible power and performance.

Here’s what’s changed.

Up to 15 days of battery life

Ring PRO delivers up to 15 days of battery life on a single charge. That means fewer charging rituals, fewer interruptions, and more continuity in your sleep, recovery, and movement data.

11 ways to improve heart rate variability (HRV)

Tue, 27 Jan 2026 17:41:22 +0000

Heart rate variability (HRV) has become an important measure of health and wellness. It’s a measurement of the time difference between your heartbeats, and greater variability shows your body is well-rested and prepared for life’s challenges.

A high HRV is an indication of your heart’s readiness to adapt well to your environment and has several benefits for overall health. But a low HRV is a sign of stress, illness, or poor recovery.

Why waking up at 3 AM could be your metabolism – and how to change it

Tue, 27 Jan 2026 16:22:34 +0000

If you’re often waking around 3 AM each night and wondering why, it could be your metabolism.

Metabolism is your body’s system that turns food into fuel so your body can keep running – breathing, thinking, repairing cells, and staying warm – and it even runs while you sleep.

3AM typically coincides with your deepest sleep phase, so consistently waking around this time suggests something is off.

Symogi Effect v Dawn Phenomenon: 3AM wakeup causes

A common cause is a dip in blood glucose, as a byproduct of your metabolism running. When glucose levels drop too low overnight, your body releases cortisol, adrenaline, and glucagon to correct it. And that often jolts you awake in the process. (PMID: 12627733 )

Introducing the Respiratory Health PowerPlug for Ultrahuman Ring AIR

Mon, 26 Jan 2026 16:57:16 +0000

Snoring is often treated like a joke in popular culture, but physiologically, it can be an early warning sign that something isn’t right.

Most people are unaware of their snoring patterns, which is why problems escalate silently for years. But research shows that persistent, heavy snoring has real health side effects:

Habitual snorers have a 46% higher stroke risk .
1 in 3 regular snorers may have undiagnosed obstructive sleep apnea .
UK/US users average 40-45 minutes of snoring per night – but most are completely unaware it’s happening.
Women snore less than men, but only by 9 minutes per night on average . However, they routinely under-report snoring, contributing to widespread under-diagnosis.

You can’t fix what you can’t see – but we’re changing that.

Diesel Ultrahuman Ring combines cultural fluency with science-backed insights

Fri, 12 Dec 2025 18:50:40 +0000

Ultrahuman and Diesel have partnered for the Ultrahuman Diesel Ring, an innovative collaboration at the intersection of fashion, culture, and global wellness.

The collaboration combines Ring AIR, the world’s most comfortable smart ring, with Diesel’s inclusivity and cutting-edge cultural fluency.

Designed for all-day comfort and all-night insight, it elevates personal performance without ever compromising on style. Under the creative direction of Glenn Martens, Diesel continues to stretch its boundaries, expanding beyond fashion into technology.

Beat the DST blues: How Daylight Saving Time changes affect your circadian rhythm

Tue, 04 Nov 2025 21:37:40 +0000

The clocks just moved back an hour – and while it looks like a small change, your body clock doesn’t automatically adjust like your smartphone’s.

Your circadian rhythm and natural sleep/wake cycle run on light, temperature, and daily cues – and it takes time to adjust.

That’s why we’ve adjusted the Ring AIR and the Circadian Alignment PowerPlug to mitigate the effects of daylight saving time.

Read on for the science behind DST changes – and how Ultrahuman Ring takes that into account to support better recovery.

Introducing Vision Cloud: The World's first universal health interpreter

Thu, 02 Oct 2025 18:45:35 +0000

Vision Cloud is the world’s first free universal health interpreter, enabling anyone, anywhere, to upload medical test results and receive clear insights, recommendations, and correlations with their wearable data.

And with Blood Vision now expanding into UAE and Saudi Arabia – with the UK and Australia rolling out in the coming weeks – Ultrahuman is accelerating its mission to make preventive health accessible worldwide.

Together, Vision Cloud, Blood Vision Essentials, and the Blood Vision Annual Plan mark a major step forward in establishing Ultrahuman as the leader in precision diagnostics and actionable health insights.

Diabetes risk blood test explained: Metabolic markers and healthy ranges revealed

Tue, 26 Aug 2025 13:57:50 +0000

The Metabolic Health panel in Blood Vision helps assess your risk of developing conditions like diabetes – a disease that, when left unmanaged, can lead to serious complications such as heart disease, kidney failure, and vision loss.

The good news is that early detection, using preventative health blood tests such as Blood Vision , allows for early action. Many people can reverse or delay metabolic dysfunction through targeted lifestyle changes.

This panel tracks critical markers, such as fasting glucose, HbA1c, and insulin levels, giving you a window into how well your body regulates blood sugar. Understanding these markers empowers you to take proactive steps before diabetes sets in.

How Blood Vision and Ultrahuman Ring AIR sparked two life-changing health shifts

Fri, 18 Jul 2025 16:24:51 +0000

Ultrahuman Ring AIR can show you when something’s off – and now Blood Vision can tell you why. When combined, they offer a powerful new way to prevent illness early, guide targeted action, and track improvements.

All too often, we wait for symptoms to appear before taking action. But research shows that preventive action improves health outcomes .

In the two real-world stories below, Blood Vision and Ultrahuman Ring AIR are used in different ways. The first proactively spots an emerging condition, and the second reacts to subtle changes in biometric data that reveal an underlying issue.

Why sleep is the hardest Tour De France stage to win

Tue, 08 Jul 2025 20:27:21 +0000

As the 2025 Tour de France kicks off in Lille, the mountain stages and breakaway sprints will grab headlines – but the hours between the finish line and the start line are where the real recovery happens.

Former elite rider Rigoberto Urán lives by the motto, “Bike races are won in bed.” That rings true because sleep isn’t a luxury during the Tour de France – it’s a performance tool.

Heart rate variability (HRV): What's normal – and how to increase it

Wed, 18 Jun 2025 12:01:32 +0000

Heart rate variability (HRV) has become a huge focus of wearable devices, and is the underlying marker for tracking wellness, recovery, and stress.

HRV is a measurement of the time between heartbeats. A high variance between heartbeats is a sign that your body is well adjusted and prepared to handle whatever life has in store.

But a low variation in beats indicates poor readiness, which can be a signal that you need to check in with your body.

Ultrahuman Early Summer Release Sprint ‘25

Fri, 13 Jun 2025 23:10:50 +0000

Ultrahuman’s Early Summer Release Sprint saw a wave of new capabilities, upgrades, and enhancements designed to make your Ultrahuman experience more insightful than ever.

This sprint represented a unique moment in our development cycle – a focused period where our product, engineering, design, science, and performance teams came together with a singular purpose: to reimagine what’s possible.

It was the culmination of months of experimentation, iteration, and cross-functional collaboration.

Each release showcases a new capability, insight, or experience. Read about them all below:

Introducing Caffeine Window upgrade: Now with real-time tracking and logging

Fri, 13 Jun 2025 23:06:26 +0000

Your favorite Ultrahuman feature just got smarter. Caffeine Window, one of the most-loved features in the Ultrahuman community, is levelling up.

As part of our Early Summer Release Sprint , we’re introducing an upgraded Caffeine Window. Now, it’s personal with effortless tagging, real-time body caffeine levels, adaptable cut-off times, and detox advice.

You asked. We built it. Here’s what’s new.

UltraSync with Tesla PowerPlug: Sync your mind, body and car

Thu, 12 Jun 2025 20:00:30 +0000

Your Tesla now understands more than the road – it understands you.

The UltraSync with Tesla PowerPlug connects your Ultrahuman Ring AIR with your car, syncing sleep quality and recovery data with real-time driving behavior.

Whether it’s your morning commute or late-night highway miles, the UltraSync with Tesla PowerPlug translates your health markers into actionable insights, helping you manage stress, avoid fatigue, and build safer habits behind the wheel.

UltraSync with Tesla brings a health-first perspective to your driving experience, with your health data staying private and never shared with Tesla.

Sleep Algorithm 2.0 explained: Personalized sleep scoring

Wed, 11 Jun 2025 22:14:00 +0000

The way you sleep is hugely personal, and the quality of your rest is affected by your age, sex, and BMI.

To understand the unique architecture of sleep, there’s no one-size-fits-all approach. The Ultrahuman Sleep Algorithm 2.0 is a massive leap forward and offers the most personalized and intelligent sleep tracking.

Sleep Algorithm 2.0 uses advanced machine learning algorithms, validated by over 125,000 nights of Ring AIR sleep data, to understand how your age, sex, and body composition uniquely shape your rest.

Introducing Ultra Age: A new marker for biological aging

Tue, 10 Jun 2025 22:33:14 +0000

Age is way more than just a number. Lifestyle and genetics can speed or slow biological aging, and understanding this can help you make meaningful differences to your health.

That’s the science behind Ultra Age, a unique and revolutionary combination of biomarkers that offer a window into how your body is aging. It combines sleep, cardiovascular signals, and blood markers into a single, trackable insight that offers the deepest possible look at your health.

Introducing Brain Waste Clearance: A new marker for brain recovery

Mon, 09 Jun 2025 19:33:35 +0000

The brain has its own way of recovering during sleep, and it goes well beyond rest. One of the most important processes that takes place while we sleep is the removal of waste from the brain.

This process, called glymphatic clearance, plays a key role in brain health, recovery, and long-term cognitive function.

Now, with the Ultrahuman Ring AIR, users can access a new signal, Brain Waste Clearance, that estimates how effectively this recovery process is likely taking place.

Introducing New Parent PowerPlug

Sun, 08 Jun 2025 17:52:47 +0000

Those first months as a parent are an incredibly special time. However, sleep can become a scarce commodity. Some parents have it worse than others, but most will go through a period of rough sleep at some point in the first year.

Sleep deprivation from multiple awakenings can affect mood, cognitive performance, and energy levels, just when you need those things the most.

The New Parent PowerPlug tweaks the Ultrahuman Ring AIR’s sleep score and recovery algorithms to account for disrupted and irregular sleep patterns. The aim is to help new parents get a true picture of their sleep duration and make informed decisions to boost recovery and reduce sleep debt.

Introducing Smart Tags: Context meets health

Sat, 07 Jun 2025 22:22:12 +0000

Context is everything when it comes to understanding your sleep, recovery, and overall health. Accurate data is powerful, but knowing why your biomarkers have changed is where real insight begins.

That’s why Ultrahuman created Smart Tags – a simple, powerful way to add meaningful context to your sleep and recovery data.

What are Smart Tags?

Smart Tags help you connect the dots between your habits and your health. They’re a way to annotate your Ultrahuman Ring AIR data with real-life context and start to build a deeper understanding of your body.

Ultrahuman Home is live: Introducing the future of healthy living

Fri, 06 Jun 2025 20:15:56 +0000

Ultrahuman Home is a revolutionary home health device, designed to transform the spaces you and your loved ones spend the most time in.

It continuously monitors key environmental factors like light, air quality, humidity, and noise. It offers personalized, data-driven recommendations to help you actively improve the health and quality of your surroundings.

Ultrahuman Home uses UltraSync™ technology, which provides a unique relationship with the Ultrahuman Ring AIR, to analyze how temperature, light, and noise within your spaces affect your sleep and recovery.

Is waking before 5 AM actually good for you?

Thu, 05 Jun 2025 10:40:18 +0000

Waking before 5 AM is often framed as a badge of discipline and boasted about by CEOs in self-help podcasts, but it may be more disruptive than productive.

Human circadian rhythms are biologically programmed for a natural wake time closer to sunrise.

Regularly rising in the pre-dawn hours can misalign your internal clock, especially if you’re not consistently sleeping early enough to compensate.

What’s more, circadian misalignment has been linked to increased risk of metabolic dysfunction, mood disorders, and cardiovascular problems.

Shift Work PowerPlug: How to manage irregular sleep patterns

Fri, 30 May 2025 14:03:11 +0000

Shift work disrupts your natural body clock, requiring you to sleep and wake at times that conflict with your circadian rhythm. This irregular pattern can impair cognitive function and decision-making, affect emotional regulation, and impact cardiovascular and metabolic health in the long term.

Sleeping at unconventional hours is often underrepresented in traditional tracking, leading to a disconnect between what’s actually happening in the body and what shows up in your data.

Age and sleep: How to use sleep as an anti-aging power-up

Wed, 28 May 2025 21:46:02 +0000

Sleep is deeply personal, but one factor affects everyone: age.

As we age, we spend less time in deep and REM sleep stages. Light sleep creeps in to fill the gaps but is less restorative. That’s why older adults often feel tired despite logging a full night in bed.

In this article, we look at what changes in our sleep architecture as we age, and what we can do to make the most of it.

Why naps are the secret to living stronger, smarter, and longer

Thu, 22 May 2025 12:00:00 +0000

Imagine a longevity technique, proven by NASA to supercharge your body, immune system, and cognitive performance – and available to everyone. No, it’s not creatine or cold plunge – it’s a simple 30-minute nap.

This week, we deep dive into one of the most underrated power-ups in human performance: the nap.

Because here’s the truth: if you’re skipping naps, you’re leaving a major chunk of your performance, recovery, and resilience potential untapped.
This newsletter will change your perspective on naps forever.

Introducing: Cycle and Ovulation algo 2.0

Sun, 11 May 2025 14:27:13 +0000

We launched the Cycle and Ovulation PowerPlug in November 2024, and the response has been awe-inspiring.

Hundreds of thousands of women use Ultrahuman’s Cycle and Ovulation PowerPlug to take control of their health and fertility tracking, totally subscription-free.

The feedback from our community has been incredible, and we’ve listened. That’s why, just six months after its launch, we’re back with a major update that makes the Cycle and Ovulation algorithm 2.0 more accurate and adaptive.

How the Ultrahuman Ring AIR tracks skin temperature

Wed, 30 Apr 2025 15:00:58 +0000

Skin temperature is a key biomarker that fluctuates based on circadian rhythms, hormonal changes, and overall physiological health. It’s a core signal and a window into sleep, recovery, wellness, and illness.

The Ultrahuman Ring AIR tracks skin temperature during sleep and compares it to established individual baselines to help users understand their body.

In this article, we’ll explore how skin temperature tracking works on the Ultrahuman Ring AIR, what the data reveals, and how to use these insights to optimize recovery and well-being.

Blood glucose spikes at night explained – and how to prevent them

Tue, 08 Apr 2025 12:29:48 +0000

It can be frustrating if you’ve noticed blood glucose spikes at night when using a CGM.

Metabolic health trackers – such as the Ultrahuman M1 – encourage users to flatten spikes and reduce variations in blood sugar levels, which are linked to improved health outcomes.

It’s common to see blood sugar rise during sleep – a phenomenon that has specific underlying causes and signatures.

Let’s dive into the causes of blood glucose spikes at night and ways to mitigate them.

Sleepmaxxing: The evidence behind the TikTok trend

Wed, 26 Mar 2025 18:56:05 +0000

Sleepmaxxing has become a huge TikTok trend, amassing over 100 million posts on the platform . But what is sleepmaxxing? Aimed primarily at Gen Z, sleepmaxxing TikTokers share tips and hacks for better sleep.

The trend is fueled by the immense longevity benefits of good sleep and the perceived beauty enhancements. Many sleepmaxxing techniques on TikTok are popular because they’re designed to boost everything from facial symmetry and jaw alignment to physical and mental recovery.

Blue light-blocking glasses explained: The evidence for sleep gains explained

Wed, 19 Mar 2025 18:11:38 +0000

The impact of blue light on our circadian rhythm is well-studied, and there’s plenty of evidence that exposure can disrupt sleep quality and increase stress levels. That’s led to the rise of blue light-blocking glasses – but are they worth it?

Blue light waves disrupt our natural circadian rhythm , which has been linked to poor sleep , metabolic health issues , and reduced cognitive performance.

But wearing dark-tinted blue-light filtering glasses, which block 80–100% of blue light, and using them for 2–3 hours before bedtime, can help mitigate these effects.

New study reveals on-going benefits of blue light blocking glasses

Fri, 14 Mar 2025 15:37:57 +0000

New Ultrahuman study indicates that blue light-blocking glasses could have longer-term benefits.
RHR remained stable in users after they ceased using BLBG.
Sleep scores were also more consistent throughout the study — and beyond.

The benefits of blue light-blocking glasses on sleep, stress, and heart rate could last longer than previously thought — according to a new study by Ultrahuman.

Blue light emitted from technology such as phones, TVs, and laptops is unavoidable in modern life. However, studies have shown that the wavelengths emitted by these devices negatively affect sleep patterns.

Sleep smarter with Ramadan Mode on Ultrahuman Ring AIR

Wed, 26 Feb 2025 19:05:36 +0000

Ramadan brings unique routines, with pre-dawn meals (Suhoor) and late-night prayers (Taraweeh) leading to altered sleep patterns and an accumulation of “sleep debt.”

During Ramadan, the early starts and late evenings can lead to chronic sleep deprivation. Sleep “debt” refers to an accumulated loss of sleep over an extended period, and research has shown sleep “debt” impairs cognitive function and reduces energy levels.

Sleep Debt During Ramadan

Last year, Ultrahuman introduced Ramadan Mode , which formed the basis of an eight-week Ramadan Sleep Debt Study . The aim was to understand users’ sleep patterns during the fasting month.