#6: Damn straight it varies. My weight is up/down 5lb at any given time... sometimes more.
And I could do a few sets of 15+ chins or pull-ups at any given time, before SS... I didn't quite keep up with doing 'em, now I can do 6 on a good day, 4 on a bad day. I'm also 35lb heavier. Wait. Maybe I'm 40lb heavier right now... ate a big ass dinner (no joke; ate enough sushi to feed a small village)