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I had a few questions (I'm sure more I'm forgetting) so I figure I'd throw them all into one thread.

-Is it possible to overdue it on protein? I'm 5'7" and 145lbs (only just started my second week and put on 5lbs already, but mostly from eating more because I definitely did not eat right before) and some days I feel like I don't get enough protein while others I feel like I overdue it. My breakfast is pretty standard and small at that (usually a serving size of cereal with skim milk and half a peach or so) but today for example, between my protein shakes and everything else I've consumed well over 150g of protein. Then like yesterday I probably took in around half that. I'm not following the nutritional plan word for word, but rather just eating healthy and making sure I get all the food groups in every day.

-When doing the Shoulder and Arms workout, for some of the moves Tony says that everyone should do 16 reps, but my goal is to build muscle and size, so on those moves I use heavier weights and get into the 6-10 rep range. Is this a mistake? Should I be doing 16 reps regardless of my goals?

-When I was about 16-17 I reached my all time high (or perhaps the word is low) of 195lbs. Over the next couple years I focused on losing weight and eventually got to 140lbs (and they stuck there for another couple years to present). I didn't exactly lose the weight the right way. I didn't exercise regularly, or really go about it with any sort of plan, but rather there were days I'd eat practically nothing all day and got used to the idea of being hungry to the point where it didn't bother me anymore. Last week when I started p90x I was 5'7" and 140lbs, and I always felt that at that weight and height I should have been more slender, but while I was slim, I was "soft." I never knew if that was because I had some loose skin from losing all that weight or what, but my question is if it is some excess skin around my stomach and wherever, is this something that if I stick with working hard with my body to build muscle and burn fat that the skin will... disappear? Or am I never really going to have that tight 6-pack because of a bit of excess skin?

Thanks for the reply. Couple more I thought of:

-I have push up stands that rotate and it's a very natural motion to twist your wrists when you push down and then come back up (at least it is for me). Tony suggests during the Chest and Back workout to work to keep your elbows in close to your body, which is extremely difficult with the little resistance on those stands to rotate. Will I get more range of motion and thus better results from my push ups by just using the dumbbells as stands to keep my hands straight but the pressure off my wrists? I do occasionally have some problems with my left wrist so I should definitely use one or the other.

-Regarding reps. Everywhere I read says 8-10 reps to build muscle and size. What if I can only get to 6 reps, or sometimes even 5. Should I decrease the weight a bit, even if it pushes me to 10-11 reps then, or am I ok with 5-6 reps on some moves?

Z is doing fine here, but for the record, he's right, anything before 6 reps gets into building power, not size.