How Smart Is Your Smartwatch, Really?

The Habit Healers · Jun 4, 2026 · 32m

Is your smartwatch actually accurate? Your Apple Watch, Garmin, Fitbit, Oura Ring, or Whoop band tracks up to fourteen health numbers, but it never tells you which ones come from a real measurement and which ones are an algorithm’s best guess. In this episode, I break down exactly which wearable health metrics you can trust and which ones to ignore.

Here’s what I want you to know. The most famous fitness number of all, VO2 max, is built on a misunderstanding. The longevity studies everyone quotes never actually measured it. I’ll walk you through what the research really found, why your…