Had Brazilian butt lift dec 9th 2014 & wanted to know when I can begin cardio/stair master, sauna steam room & weights?

In general, for my patients I allow them to go back to light aerobics by about 4-6 weeks.  Always best to ask your surgeon.

Hello dear!!
Thanks for the question and provided information as well.
I recommend my patients to wait at least 4 weeks before resuming their workout routine (cardio, lift, etc.).
If you have any concerns, I suggest you follow up close with your plastic surgeon.
Hope this is helpful. Good luck :)