Sleep
Explore our latest articles on sleep to feed the curious you.
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
The surprising effect of inconsistent sleep on your body
Ultrahuman research suggests inconsistent sleep elevates heart rate and impacts recovery
Sep 29, 2026
Why jet lag hits harder flying east – and how to avoid the slump
We explain why flying east hits so hard, and how to make it easier on your body – including a smart tip on morning light
Sep 28, 2026
Why a good night's sleep starts with morning light
We explain why exposure to morning sunlight can help you sleep better – and how much you need to shift your circadian rhythm
Sep 28, 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
Blue light-blocking glasses explained – and how they improve sleep
Blue light frequencies have been shown to destroy sleep. We explain the science and how blue light filtering glasses can help
Sep 24, 2026
How long caffeine stays in your system – and why you might feel it for longer
Discover how long caffeine takes to leave your system, and when to cut off caffeine to protect your sleep
Sep 24, 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
How the Ultrahuman Ring tracks sleep stages
How the Ultrahuman Ring identifies light, deep and REM sleep from pulse, movement and skin temperature, and how to read the results.
Sep 16, 2026