G'day there 40. Long time. Sounds like you took a crash there bro. I know the feeling you are talking about at the gym, usually I get the shakes along with it too. Sometimes I had to cut my workouts short because of it. The powerade works so damn good because it is quick (high glycemic), and your body was craving them carbs.
252 eh? Up from what? I here you there, 270 is a big mofo! Id guess that you may be holding a bit of water. It can be kinda decieving, I am 217 right now, but my good buddy who is only 200 looks like he would wiegh more than me. I think that I am just a lot more dense (thicker) than him.
Good luck bro. Watch that crash before workouts. I always have a half toasted multigrain bagel, with half of a ripe avacado spread on it about 45 minutes before my workouts. Avacados are high in calories but are loaded with mono unsaturates too. Excellent power snack. Sometimes I will grab a gator aid to get me through the workout, depending on how grueling it is, and how my body feels.
Take Care,
Mavy