Biomarkers
Explore our latest articles on biomarkers to feed the curious you.
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
Heart rate variability (HRV) explained & how to increase it
We explain HRV, and the science behind this important wearables metric – and finally, what it says about your health.
Oct 05, 2026
The vagus nerve and HRV: How to unlock your parasympathetic superpower
Discover how the vagus nerve influences HRV, stress, and recovery — and how you can train it to improve parasympathetic tone and resilience.
Oct 02, 2026
12 ways to increase heart rate variability (HRV)
We list science-backed ways to increase HRV in the short and long term to promote better performance and your rest-and-digest nervous system
Oct 01, 2026
How to use HRV to train smarter
Learn how to use HRV data to guide your training, improve recovery, and optimise workout timing based on insights from Ultrahuman Ring AIR users.
Oct 01, 2026
Skin temperature: What's normal and how it fluctuates
We explore skin temperature, what's normal, and how it naturally fluctuates during sleep, the menstrual cycle and with training or illness
Sep 30, 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
Diabetes risk blood test explained: Metabolic markers and healthy ranges revealed
See how the Blood Vision Metabolic Health panel tracks fasting glucose, insulin, and HbA1c to catch diabetes risk early and guide preventive lifestyle …
Aug 26, 2025
10 cardiovascular health blood test markers explained
Understand what your heart health blood test results mean. This guide explains 10 key cardiovascular markers, from LDL and triglycerides to hs-CRP and …
Aug 05, 2025