Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.


macrumors 6502a
Original poster
Nov 19, 2018
I use it when I do HIIT on a treadmill. It's really nice because I can just put my iPhone right in front of me on the treadmill and see which heart rate zone I'm in vs. which one I need to be in. If I tried to look at the Watch instead, I would fall off the treadmill like 18 times.

Seems like it automatically turns off after somewhere between 2 and 5 minutes. I have to start it again which is difficult, annoying, and maybe even dangerous. This happens even when my iPhone's autolock time is set to 'Never'.

Anyone know how to keep it going?


macrumors 604
Oct 26, 2008
have you tried restarting the phone? Maybe check low power mode under "Battery"


macrumors 603
Mar 10, 2016
I know it's not the answer you're looking for, but you could also train yourself to be able to look at your watch while running maybe. Just start doing it at slower speeds. At a full sprint it would obviously not be possible, but at a reasonably swift jog it should be achievable.
  • Like
Reactions: kitKAC
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.