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What Is Cortisol and Can a Smartwatch Help You Manage It?

Cortisol gets a genuinely bad reputation as simply "the stress hormone," but the biological reality is considerably more nuanced than that popular framing suggests, and it's worth understanding pro...

How to Use HRV to Time Your Hardest Workouts

Most people glance at their HRV number once each morning and move on with their day without really using it for anything meaningful. Used properly and thoughtfully, though, heart rate variability c...

Wearables and Mental Health: What the Data Actually Shows

Wearable brands, COLMI included, increasingly talk about "stress tracking" and "mental wellbeing" features alongside heart rate and sleep data. It's worth asking honestly: what can a smartwatch or ...

How Wearables Can Help You Manage Work Stress: A Science-Backed Guide

Workplace stress has become one of the defining health challenges of modern professional life. The UK Health and Safety Executive estimates that stress, depression, and anxiety account for over 50%...

How to Improve Your HRV: A Practical Guide Using Your Smartwatch Data

Heart rate variability — HRV — has quietly become one of the most talked-about health metrics in both elite sport and everyday wellness. Athletes use it to optimise training loads. Researchers use ...

Smart Ring or Smartwatch for Stress Tracking: A Practical Comparison

Stress is one of the most common health concerns of modern life, and wearable technology has increasingly moved into the space of helping people monitor and manage it. Both smartwatches and smart r...