"Bad boy and good boy," she began in the clip, taking a step with her right foot and then her left.
"There's only 20 percent weight," Shields said as she walked down a hospital hallway. "The goal is to bend your knee each time like a little bit, just so you're not dragging it or hitching up your hip."
"Broke my femur. Beginning to mend," she captioned the post. "No matter what your challenge is, make a positive choice, for yourself, to move forward. #BeginningIsNow."
Shields didn't mention how she broke her femur.
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Fans and celebrities took to the comments section to wish Shields a swift recovery.
"I know you will heal so quickly. The Force is strong in you, my friend!" Jennifer Beals wrote.
"Brooke! So sorry! Courage...it's in your blood," Glenn Close added.
"Oh crap honey I'm so sorry let me know how you're doing," Sharon Stone commented, before offering to bring Shields food.