[Lio]

I find sleep tracking to be really useful.

One thing that surprised me has been seeing the affects of either alcohol or caffeine on the type and quality of the sleep I get.

Even if the absolute numbers aren't 100% accurate the watch definitely spots when I've had even 1 beer during the evening.

I also find heart rate variability interesting. I can't put much spin on the absolute numbers but after either heavy exercise or if I've been unwell I can see the variability rate really drop.