— -- Supreme Court Justice Ruth Bader Ginsburg turns 85 years old today.
The longtime personal trainer of the Supreme Court Justice -- who gained the nickname "The Notorious R.B.G." -- shared secrets in October for how the 85-year-old stays physically strong every day as she interprets the Constitution.
Bryant Johnson has trained Ginsburg since 1999, shortly after she was treated for colon cancer. Ginsburg referred to Johnson in a past interview as the most important person in her life.
The two have worked together to rebuild Ginsburg's strength and bone density following the oldest Supreme Court justice's two battles with cancer.
Johnson said Ginsburg is known for wearing a shirt that says "super diva" during her workouts. He is now sharing the workout for his "inspiring" client in a new book, "The RBG Workout: How She Stays Strong . . . and You Can Too!"
"She is a living example of what she stands for, including the fight for equal rights for women," Johnson said of Ginsburg in a statement announcing the book.
Johnson appeared live on "Good Morning America" today to demonstrate Ginsburg's workout, which he has dubbed "The RBG Workout."
Here are the moves that he shared that you can do at home, with demonstrations by an animated Ginsburg figure: