How To Get Iwatch Off Low Power Mode. You can change the power mode to extend battery life during an activity. Then I saw the comment about pressing both side devices button and rocker switch.

You can do that by swiping down with one finger until you hear VoiceOver say control centre and double tap. First raise your wrist to wake the Apple Watch. If that doesnt work try turning off low power mode by going to the battery settings in the Apple Watch app.
Enable Power Reserve by swiping.
You can get to them by doing any of the following. To do this press and hold the side button until the Apple logo appears. Turn off Your Apple Watch. You can get out of Power Reserve Mode by pressing and holding the Side button until you see Apple logo on the center of the watch face.
