Muscle testing

i have been wanting to learn about using muscles to deform rigs rather than the bones themselves for some time.

i came across this tutorial which was a really useful and simple introduction to it
http://area.autodesk.com/louis_tutorials/creating_muscles_in_3ds_max

Here is what i produced from following the tutorial

there are also some very powerful muscle tools in maya that i have been looking at, as seen here http://www.youtube.com/watch?v=a1mpJp3YJvs

I probably won’t use muscles to rig the zombie character as it is quite a simple character wearing baggy clothing however i am finding it useful and interesting to learn about and it may come in useful it i come across any problems with the rigging that i cannot solve with just bones or CAT