hiya,   i'm a soon to be a 29 yr old girl and 5'2"and  slightly chunky. anyhow, i would like to take martial arts but i have no idea what kind.  there are sooo many choices!!  when i was 10 yrs old, my bro and i were taking free karate classes given by 2 cops at their homes.  it was great but i am pretty positive one of the exercises(legs opened, knees bent, moving from side to side-going all the way down) messed up my knees because ever since i have bad knees.  so, giving y'all my "medical " background, is there a style that would fit my knees? i mean needs?   thanks for y'alls help!     ps  i live in south austin.  can anybody recommend a place too?[/i]