What sort of magic surgery did she have that allowed her to get back to work immediately after 2 disc herniations?
I would guess they shot around her (with stand-ins), or if anything, only used her when she's sitting/talking. That's what happened during the production of Indiana Jones and the Temple of Doom, when Harrison Ford--after performing a stunt--suffered a severely herniated spinal disc, and despite his efforts to continue working, had to be flown to a hospital for surgery while his stunt double (Vic Armstrong) stood in for him over the course of five weeks.
Considering the location of Rose's herniated disc, no doctor--and the studio's attorneys worth their pay (and concerned with insurance issues) would authorize her to go back to a normal routine so soon after a near-catastrophic injury.