A reader once messaged asking why their wrist-based tracker showed 88 beats per minute standing still, then spiked to 165 the second they lifted their arm to adjust their headset strap. No exercise involved. Just a shoulder movement. That kind of jump looks alarming if you don’t know what’s actually happening behind the sensor, and …

I made the switch from a wrist tracker to a smart ring about a year into working with clients who kept asking the same question. Why does this thing on my finger cost as much as a watch but do so much less on the surface. Fair question. The honest answer took me longer to …

I used to assume a smart ring just measured sleep the way a stopwatch measures a run. Time in bed, time asleep, done. Then I actually sat down and read through what one of these devices logs across eight hours, and it turned out to be closer to a dozen different data streams running quietly …

There’s a persistent belief that a wrist tracker giving you a heart rate number means that number is accurate. It doesn’t. Accuracy during steady-state activity and accuracy during high-intensity interval training are two different technical problems, and most consumer wearables solve the first one reasonably well while still struggling with the second. This isn’t a …

“Which one should I actually buy?” That question comes up constantly, usually from someone standing in an aisle or scrolling a product page at midnight, torn between a sleek ring and a watch loaded with running metrics. It’s not a bad question. It’s just one that gets answered badly most of the time, usually with …

Most people assume a missed step is a tracking glitch. It usually isn’t. It’s the algorithm doing exactly what it was built to do, just not what you expected it to do. Here’s the belief that trips people up: slow walking should still register as walking, because your legs are still moving in the same …

There’s a specific message we get more than any other at Aeryon Wellness, and it usually starts the same way: “My watch says I burned 600 calories on a walk and I don’t buy it.” People assume the problem is them, that maybe they misjudged the intensity or forgot to log something. Most of the …

A client asked me last month why her fitness tracker said she’d burned 220 calories during a forty-minute AR boxing session that left her drenched and shaking by the end. She wasn’t wrong to question it. That number was low, and there’s a specific reason wrist-based trackers consistently undercount effort like that. It comes down …

Put two fitness trackers on at the same time, one on each wrist, and run the exact same workout. Compare the numbers afterward. They won’t match. Not close, not roughly close, sometimes off by twenty percent or more on calorie burn alone. We’ve done this test with clients more than once just to make the …