I think it can be lots of fun - this is coming from a woman who used to HATE exercising in any form! Getting and staying fit is hard for some women; I am one of them, and I think it's going to be a constant battle for me. Pilates and Zumba are great programs, and I know several women who are in excellent shape as a result. As Peela mentioned, body type is definitely going to be a factor... as is metabolism, diet, sleep, medications (if any)... there are so many things that will affect getting fit, and it's definitely not a "one-size-fits-all" fix like we're made to believe in exercise infomercials, magazines, etc. I've found the suggestion of having an exercise buddy is truly motivating and is one of the things that works for me. Left to my own devices, I'm lazy!