You’re wanting to turn off what strava calls live segments. Open the starva app and push the record button like you’re going to start a ride. Upper left corner should say settings, push on that to open the settings menu then find where it says live segments and push on that to open the menu to tune it on/off. Screen shot of the settings app attched, notice the live segment square down in the bottom right of the picutre, that’s what you’re looking for.