​​​​​​For the record, and getting back to NoWhammies ' question. People who love cycling probably spend 22+ hours in an average day off their bikes. Whether this specific feature (PulseOx) is valuable is the question of this thread. But there's definitely value to cycling in things that happen off the bike, that's the idea behind a lot of the features in these watches.

To answer the question, I have this turned on even though I'm not convinced there's a lot of value in it. I'm a data guy and think that if there's any utility, having a good background measurement will enhance that. And the battery life is pretty incredible these days (F6x) so it's no biggie. 🙂 It agrees within 1% at the doctor's office for what it's worth.