Laur, your post kind of confused me...

You said in your diet you don't eat any high glycemic foods....and no low glycemic foods.......so you don't eat carbs period? All you admitted to eating was protein...so I am kind of confused about the specifics of your diet.

As for being itght and stretching.......while it may only be a small factor, your diet is important in how your muscles react to certain types of stress. The B vitamin group is assists with muscle contractions. While I highly doubt you are deficient, a Multivitamin per day might help you out some, mixed with some intense stretching...

When i was training in martial arts my trainer was very tight also, he had to stretch an hour a day to just maintain his flexibility. On the other hand, After 2 months of training I was able to do a full split and get my feet behind my head. Some people are just naturally tight but if you do take the time to really apply yourself to stretching you can overcome it. Being with a stretching partner may help. I may be ignorant, but as far as I know, the only way to improve the "tight" feeling is to stretch....and it's worked wonders for me.

As for the lifting/cardio routine -- im sure someone else here will have a better insight than I will