Is it recommended to exercise before BBL?

Hello dear!
Thanks for the question and provided information as well.
It is always good to exercise, it even helps improve your results. 
In general, you need to be physically healthy and at a stable weight, have realistic expectations, be a non-smoker and your BMI needs to be 30 or less.
l recommend you to make an appointment with a board certified plastic surgeon to talk about your goals and anything you need to know.
Good luck :)

       Keeping fit is good before the surgery.  As long as you have enough body fat for the surgery, then working out can only help you.  I typically do not recommend gaining weight prior to surgery, because most patients have enough fat to perform the procedure.  Find a plastic surgeon with ELITE credentials who performs hundreds of Brazilian buttlifts each year.  Then look at the plastic surgeon's website before and after photo galleries to get a sense of who can deliver the results.  Kenneth Hughes, MD Los Angeles, CA

you will always be helped by more exercise and toning your body prior to the BBL procedure. your end result will be improved