Well that should do for the double tonging exercises for now. Let's exercise those cheek muscles. This exercise is simple and only takes your didj. Just grab your didj and while playing squeeze your cheeks and then allow them to puff out fully over and over just as FAST as you possibly can. And keep it going for as long as you can then a little longer.
Advanced players can breathe while in most any mouthshape.
Doing this exercise, you should gain an appreciation of how mouth movement can sustain a drone with little or no airflow through the mouth. Work towards keeping this rapid cheek movement going to five solid minutes. Next we'll turn attention to playing from the gut. We'll use a couple of exercises which will isolate that diaphragm and use it as a rhythmic element. We'll start like we did in the beginning with the featureless drone, but this time putting in gut slaps in regular intervals.