How often after the BBL would do you have to get up and walk to avoid blood clots??

I recommend to my patients to get up 5-6x per day and walk to the kitchen and or bathroom and also to pump their feet while laying or sitting. The risk for a blood clot is increased for 2 weeks post op. I ask my patient not to put pressure on their buttocks for 10 days. 

Post operative instructions will vary between plastic surgeons. You should follow the instructions of your plastic surgeon. In my practice, I advise my patients to walk (with assistance as needed) every hour for at least 5 to 10 minutes with calf exercises in between the walks. After the first 24 to 48 hours, they should be up and walking even more often than that to help with circulation and to reduce the risk of blood clots.  Ask your plastic surgeon for specific walking instructions for you as s/he should know all of your risk factors for blood clots.