How BMI and obesity affects sleep
Discover how BMI and obesity affect sleep quality and deep sleep, why poor sleep fuels weight gain, and how Ultrahuman's Sleep Algorithm accounts for …
Jan 26, 2026
The perfect nap length to supercharge your brain and boost alertness
Short naps can supercharge focus, memory, and mood – but the wrong length or timing can backfire
Jan 21, 2026
Low HRV and stress explained: The signal you should never ignore
Low HRV is a warning light. Understand how to spot chronic stress early, and use sleep, breathwork, and training tweaks to recover.
Oct 09, 2025
From periods to ovulation: How your uterine cycle speaks in signals
Discover the science of the dual menstrual and uterine cycles and learn how Ultrahuman’s Cycle & Ovulation Pro can help you understand them
Oct 08, 2025
Sympathetic vs parasympathetic – your guide to everyday balance
The tug-of-war between these two systems keeps you productive and healthy – here's how to keep the balance
Sep 18, 2025
Why 3 AM stress destroys your sleep – and how to combat it
Why 3 AM stress wrecks sleep – and what to do. How to safeguard recovery and long-term health from stress
Sep 12, 2025
How the timing of stress can protect your health and help you stay productive
Stress isn’t the enemy – mistiming is. Use your body clock to schedule work, training and wind-down for better focus, sleep and recovery – without …
Sep 05, 2025