Hey everyone, thanks for taking the time to read my post. I recently started the P90X workout program (it will be 2 weeks ago Sunday), with Fridays being my "rest day." The first few days, I couldn't sneeze without some muscle feeling it. And now, I barely get that "burn" the next day. I feel like I am pushing myself properly. My work up a pretty drenching sweat, and struggle with the last two reps, enough to feel the burn and push myself. I've also upped my protein intake by quite a bit. I take 4 scoops a day of whey protein, on top of 2 Mega Men sports vitamins from GNC. So, my question is, am I not feeling it the next day because I'm working my muscles incorrectly, or does the protein and the vitamins really play that big a role in my muscle recovery?