sound and visual alerts in workout mode

Hello, is there a way to get rid of the sound and visual alerts while in workout mode with zones HR, W, pace ... to respect. 

I still want to tell the watch I have to run at 140 HR for 45' but I don't wan't it to vibrate and show big visual alerts that I am "in the zone" or that my HR is 143 for 5 seconds.
Is that possible ?