I'll pass on what I've learned from the past experience of the physical, and I thought I was ready for it.
I ran every day / second day, bout 3 clicks... did the pushups and situps with no problem.
When you get in that room, it's a whole different story. I was nervous bigtime, so my heartrate was up. They had steps there, and some dude on a cd giving instructions. Where I was nervous, I was also a bit shaky, and missed a few steps. Like, you're not allowed to put two feet on the middle step, and two of your feet have to be in a few inches on the top step. So she stopped me half way thru and said enough. I thought I had failed, but nope, she said my VO2 was good enough... thank god. Got to the pushups, Was goin perfect, goin at a good speed, till #16. Then arms started to buckle. I was very surprised, and disappointed, because this didn't happen before. I did #17. Arms buckled a little more. #18, Arms hurt shake uncontrollably. #19, took me like 8 seconds to get this one fully completed, but I pushed myself as hard as I could, got the 19th done. Then, with no considerable breather, situps. I could do like 50 at home. I got there, and after 10, started to feel the burn. I was like, wtf? The 19th situp felt like hell. This never happened to me before. I always could do at least 30, on my bad days.
What I'm saying is this. (Many have said it before). You can never be trained. The minimum won't just cut it. I trained, not well, but I could do a bit more than the minimum, and I still had problems. Prehaps it was the nervousness, I don't know... but if I had my time back, I would have trained much more. Acheiving the bare minimum was enough, but I made it quite clear that I was disappointed, and could do more... have done more while training for that day.. Oh well...