Just a little info that I've learned along the way....
I had some major knee surgery, and I found that a running shoe with a lot of arch support goes a long way! Grab the shoe with both hands, finger tips of one hand the the front and the tips of the other at the rear and with both thumbs in the middle. Bend the shoe and see how stiff it is.
Personally, I've found that Asic gel series have a grip of support, very light weight and work best for me (I got a pair of gel-1110 duomax). For PT while in the Army, it seems like most people would use NB's (I had the 801 and 802 series and liked them).
