How much time interval does s4 watch measure heartbeat?

[shankar2]

So i want to know how much time interval does the s4 watch measure hearbeat and synchs data with the iPhone? Is the interval adjustable? Thanks!

 

[oeagleo]

From what I've seen, the interval that the watch measures your heartbeat varies from 1 minute (during exercise) to up to 10-12 minutes when you're not. The inconsistency pretty much makes the heart rate graph unusable for any serious study, but that's the way it is. As for how often the watch synchs with the phone, I've noticed it's pretty much instantaneous.

 

[ftaok]

On my S2 ...

During a workout, every 5 seconds. (Using the stock workout app). Some 3rd party apps record every second (iSmoothRun)

During regular life, every 5 minutes, but it varies. Sometimes it'll wait as long as 10 minutes, but it's rare.