The Pixel Watch doesn't do all that continuously, but it does constantly measure your heart rate.

Hi, gw4 owner here. HR can be monitored 24/7 and you can setup notifications if it crosses a threshold during 10 mins while you are resting.

Oxygen - manually or automatically during sleeping, no notification - you must check results yourself

BP - manually only, requires Samsung phone, does not work in the US yet (latter 2 can be workarounded

ECG - manually only, requires Samsung phone (latter 2 can be workarounded. With wearos 4 monitoring of irregular hear beat will be added

Stress (based on HRV) - can be monitored permantly, no notifications

Resting HR - is recorded, if HR is monitored.

VO2 can be estimated for outdoor walking, running, cycling (not sure)

Btw, resting HR and VO2max are most important fitness metrics.

All said above is relevant for gw5 pro. Probably, gw6 which will be announced in the end of the month will can more.

I'm not aware of any wearos watches which can more. Accuracy is a holy war topic, where many individual person paramers play a role.

you are welcome for more questions like that to !galaxywatch@feddit.de

I have the Galaxy Watch 4 and I like it. Here's a screenshot of the heart rate settings. On my current setting, it monitors continuously while exercising (including a long walk) and every 10mins while still.

It can also monitor blood oxygen continuously, but only during sleep (presumably to check for sleep apnea). While awake, you can take a manual blood oxygen measurement

I have a Fitbit sense, it has a blood oxygen estimation but not constant, doesn't really do blood pressure.

If you are just looking for those metrics then it doesn't do a bad job, basically a lifestyle tracker. If you are looking at it from a sports perspective I'd recommend a Garmin over a Fitbit.

I don't have any experience with any others though.