Well I did my first night of round 3 with P90X and I learned my lesson. I have been running and lifting for 5 months now so I thought i was in excellent shape. I may be in great shape but I have alot of work to to. The DVD started with Chest and Back and I went at it setting goals for each workout just like the guys on the dvd. What do I do wrong? I set my goals right with theirs…… on my first day. These guys do this all the time. I did pretty good except I got done and had to stay laying down with feet elevated for over a half hour. Each time I stood up I could feel the tunnel vision coming and I would lay down as fast as I could before fainting. It is a intense workout and I recommend pacing yourself and taking it easy the first few times to see how much stress your body can take.