First: Zod, when you mention "isolation" exercices, what do you mean? I'm not familiar with the English training vocabulary, so I need to have things cleared up a bit. Is benching considered an "isolation" exercice?
Doomcifer's explanation on "isolation" exercises was right on. Just to expound a bit, while squats and bench are obviously compound exercises, there's also those in between movements. For instance, standing dumbells aren't traditionally considered a "compound" movement. However, they aren't an isolation exercise either. The equivalent isolation version, of the standing dumbell curl, might be dumbell preacher curls. When doing this movement, the only exercise engaged is the bicep. whereas with a standing DB curl, you also engage your shoulder, and your back to a lesser degree.
Doomcifer's comments about post-work out drinks were also dead on.
Second: well, not really a question, but a comment about what you said earlier about letting your muscles rest.
What I meant was, to train each muscle group once a week, and only once. For instance, most people wouldn't do squats twice a week. That said, there are as many different theories as there are body builders. And in the end, do what works for you.
I agree with pretty much everything you said, especially the part where you said to train one group of muscle per week. My own program is a bit like this:
1st day: pectoral/biceps/triceps (super-7)
2nd day: back/shoulders
3rd day: legs
4th day: biceps/triceps
Your pairings are a bit unique. That said, if it works for you, and you're happy with your results, that's all that matters.
At each session, I do abs and I TRY to do cardio (emphasis on try cause doing cardio is so fucking boring imo, even with an ipod).
I assume at the end of the session?
3rd comment: about the protein shakes: I'm somewhat against it. IMO, you should try to get your proteins through your diet. I eat a lot of fish, tuna, peanut butter and such. Call this superstition, but I think protein shakes are nowhere near as good as a good diet, even though, chemically, the proteins are supposed to be the exact same molecule as the proteins we find in food. Heck, when you've done a lot of chemistry, you'll notice there is no distinction between natural molecules and synthesis molecules, they're all the same thing.
You're a 100% correct. The ideal is to get your proteins, and even your calories, through natural sources. However, sometimes it's not possible to get enough. And the difference between natural and those found in protein shakes is almost negligible.
...but there are no researches about the long term effects of using such products, so I would suggest not to try it.
That's not true. Creatin is the most researched body building supplememnt ever. It's been in use for decades.
Zod