Training Indoors
You can turn GPS off when you are training indoors or to save battery life.
Select
> Settings > System > GPS > Off.
> Settings > System > GPS > Off.
TIP:
You can also select 
at the top of the screen to turn off GPS.
at the top of the screen to turn off GPS.
When GPS is off, speed and distance are calculated using the accelerometer in the device. The accelerometer is self-calibrating. The accuracy of the speed and distance data improves after a few outdoor runs using GPS. The next time you turn on or unlock the device, it searches for satellite signals.