Well, I'm coming into Day 4 of P90X Lean, and I am FEELING it!
Since beginning my P90X journey, I have discovered muscles that I had no idea existed. I'm sore in the expected places - abs, glutes, quads, calves, and all the arm muscles - every single one of them. And I'm sore in some really unexpected places, like the tops of my feet (new this morning), around my rib cage, and in my arm pits. I would have thought that the sore muscles would hold me back in my workouts, but the amazing thing is, once I get warmed up, they aren't sore at all; so it doesn't affect my workouts whatsoever, which is definitely a welcome discovery.
I've also noticed that I have more energy. Now, this isn't like a blatantly obvious energy boost like you see on vintage cartoons when a character drinks from a bottle labeled "pep" and suddenly can lift school buses. This was a more subtle change, and I almost didn't even notice it. It showed up in little ways, like when I am cleaning, I don't have to take as many breaks; and in the evenings I'm not quite as completely drained. But, it's there. And I would imagine that will only get better as I continue.
Another big difference I'm noticing is I'm HUNGRY, like all the time. I have to be honest here: I always thought all these fitness gurus were out of their gourds talking about eating 5-6 small meals a day. I mean, really, who is hungry enough to eat every 2-3 hours? And who has the TIME for all that craziness, anyway? But I have found the word "meals" is deceiving. I am eating every 3 hours or so, because if I don't, I get absolutely famished. No kidding. I'm talking, "my stomach is gonna eat my liver if I don't eat right now" famished. So I've started incorporating light snacks into my day. Snacks like a serving of raw baby carrots (14 carrots) with a wedge of Laughing Cow cheese and five Triscuit Crackers - a snack that has a grand total of 155 calories, and has proteins and carbs to carry me through to my next meal and is actually amazingly filling.
All-in-all, I'm really amazed at the immediate changes I'm noticing in how I feel. I can't fathom what kinds of changes I have to look forward to in my future if I'm feeling this many changes less than a week into it. Whatever they are, they're patiently waiting for me, and I can't WAIT to reach them.