Thanks for the advice. When I first started this program, I was was pretty worn out all week. Now, I am doing much better...not as tired and sore. I guess it just took awhile to get used to it.
I worked one muscle group a week last year and saw moderate gains, so I decided to mix things up with more volume starting back in January. After a few months, I will probably switch back and see how it works.

Thanks again for your input.