When is it okay to lift real heavy weights after FUE?

It is best to ask your surgeon about post operative care as each doctor has their unique regimen.   Most doctors advise no strenuous exercise for one to two weeks.

Usually once the crusting clears up at the recipient site you should be in good shape to start exercising.  The concern with crusting is obviously not only increasing your blood pressure and bleeding, but also sweat.  Crusting is dried up blood from implanting the grafts - any sweat can lead to bacteria in that area and an unfavorable outcome. That being said, your doc may have a different treatment regimen and recommendations based on what was done for you.  It is not a bad idea to give the office a call and see what they recommend.  Best of luck! 

I recommend waiting 2 weeks, but doctors generally would tell you to wait anywhere from a week to a month, it just depends on how conservative they are and any factors that are relevant in your case. The best answer you could get to this question would be from asking your doctor directly.

After the first day post follicular unit extraction / hair transplant you may do non-strenuous activities as long as you don’t touch the transplanted area.   As for heavy lifting, waiting an additional few days should ensure that all scabs/crusts and swelling/inflammation has resolved. You can resume all activities the second week after an FUE procedure.

Although you can resume almost all activity after an FUE, I recommend 4 days for cardio and 8 days for heavy lifting.  This ensure the graft is in place.