How to pronounce “shuttling” in English

So we started shuttling all the gear to the base of the wall.

And I'm just shuttling around between tabs in the browser or typing something in to verify something and make sure it's historically accurate.

So when it comes to recovery, you definitely want this hormone to be fully active and shuttling as much nutrients for recovery

And it appears to us that we're multitasking, but actually were shuttling.