Yep sure am our teacher works it in with our training...Its great.

There is a rumour that a famous Bagua Master was in Russia years and years ago and it is said he taught Stalin's elite body guards or something.
I study Liu He Zi Ran Men Kung Fu and our teacher constantly finds techniques that are the same as ours. Systema is big on all the internal energy side of things as well, have you seen their videos they are great!

So yeah its all about taking your opponents energy and giving it back ten fold and absorbing hits, being really supple and relaxed, no tension.
Its like Tai Chi, Bagua lots of the chinese arts