Yo, here is a really nifty exercise I have used with students in an attempt to increase their physicality in presentation.

Take any routine that you do well that has a fair amount of 'patter' in the presentation and which you may even feel is dependent upon it. Practice and then perform the routine in total silence. NO patter. You can't even write stuff on note cards...

You may or may not want music as background. I would try it both ways, but the real exercise is to do it without sound at all. No grunting...and trust me you will WANT to make some type of vocalization!

Although this may sound like an odd thing to do I can virtually guarantee your presentation will benefit from it. Good luck,