turn wrist only activated during workout

Hi Everyone! During the day I would love to conserve some battery time while having the display in always-on mode. During workouts, though, it's sometimes impossible to activate the screen with the other hand (biking) and see the information clearly. I wish there were an option to only turn wrist activation on during workouts only.

Alternatively, is there a way to make the inactivated screen less blurry? For some data (like time or average heart rate /speed, the 1Hz refresh would be totally sufficient and the display could remain in low power mode.