How Fitness Trackers Turn Raw Data Into Insights
I've had some form of a fitness tracker attached to me for years now. An Oura Ring on my finger, Apple Watch on my wrist and at this stage, I've worn too many rings and bands for me to keep track. The question I've gotten asked most times, usually by a friend eyeing my sleep score with some degree of suspicion, goes something like "How does it actually know that?"
It's a valid question to ask. My ring has no idea how badly I've slept. My watch doesn't know I'm stressed about meeting my deadline. All they have is some set of numbers being produced off of a sensor every few seconds. Beyond this point, anything else, such as my sleep score, readiness score and "Your body needs recovery," comes after all sorts of mathematics going on behind the scenes. I wanted to actually break down what's going on between...
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