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Using Wearables to Monitor Cardiovascular Health: What You Can and Cannot Track

Heart health is one of the most common reasons people buy a fitness tracker or smart ring in the first place, and it's also one of the areas where it's easiest for marketing language to get ahead o...

How to Use a Smartwatch for Marathon Training: A 16-Week Guide

Training for a marathon without any way to track pace, heart rate, and recovery is a bit like cooking without ever tasting the food — you can follow a plan, but you're missing the feedback that tel...

Smart Ring vs Smartwatch for Sleep Apnoea Awareness

Sleep apnoea affects a significant number of adults in the UK, and a large proportion of cases are thought to remain undiagnosed for years. It's understandable that people ask whether a smart ring ...

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 ...

The Truth About 10,000 Steps a Day: What Science Actually Says and How Your Smartwatch Can Help

"10,000 steps a day" is one of the most widely repeated health recommendations in existence. It appears on fitness tracker packaging, in GP waiting rooms, in school PE curricula, and in virtually e...

How to Track Your Fitness Progress With a Smartwatch: A 90-Day Plan

Starting a fitness journey is easy. Sustaining one for 90 days — long enough to see real, measurable results — is where most people struggle. The gap between intention and consistent action is wher...

Can a Smartwatch Help You Sleep Better? What the Research Actually Says

The marketing around smartwatch sleep tracking is confident and compelling: wear the device to bed, see your sleep stages, improve your health. But sleep is one of the most complex physiological pr...

Zone 2 Training Explained: How to Use Your Smartwatch Heart Rate Data to Get Fitter Faster

Zone 2 training has become one of the most talked-about concepts in endurance sport and general fitness over the past few years — and for good reason. It's backed by decades of exercise physiology ...

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%...

The Science of Sleep: What Your Smartwatch Data Is Actually Telling You

Every morning your COLMI smartwatch or smart ring gives you a sleep score. Maybe it's a 74, maybe it's an 88. Light sleep: 3 hours 12 minutes. Deep sleep: 1 hour 5 minutes. REM: 1 hour 40 minutes. ...