Started week 3 of P90X3 with Core Synergistics. I'm a little frustrated this morning because I never know how my body is going to react. I started off strong, bumping my numbers up slightly from last week, and felt great. About 3/4 of the way through, though, my mystery condition suddenly kicked in and I got dizzy and nearly passed out. It's just annoying because sometimes it happens and sometimes it doesn't and there's never an indicator that it's on its way. I finished out the workout but had to limp through the last 10 minutes. Annoyed.