Originally posted by hjhlota
(I am only 4'11" and had on a full length tank....) [/QUOTE
You should definitely be using a smaller tank. If you are that small (sorry ) you most likely don't need all that air, and a smaller tank will be much more comfortable for you. Geez, an AL 80 is probably 1/3 your weight! Anyway, try smaller tanks, it should make a big difference. If you were in my class, I'd have you using a 50 to start out with.
Neil