The pervert pleaded guilty to 10 counts of sexual assault.
Judge Rosemarie Aquilina told the disgraced medic as she jailed him: “I just signed your death warrant. You preyed on everyone’s vulnerability. I’m not vulnerable. Not to you. Not to other criminals. I swore to uphold the law and I know what to do.
“It is my honour and privilege to sentence you because you do not deserve to walk outside of a prison ever again.”
During the week-long hearing in Michigan, the court heard statements from 156 victims who told of the shocking abuse they endured at the hands of Nassar, who was the USA Gymnastics doctor for 20 years.
Double gold-medallist Aly Raisman, 23, branded him “sick”, adding: “I can’t even comprehend how angry I am when I think of you.”
Kyle Stephens revealed in a harrowing testimony how she was systematically abused by family friend Nassar from the age of six until she was 12.
Other Olympic sports stars who came forward included Gabby Douglas and McKayla Maroney, both 22.
Another of Nassar’s victims, Kaylee Lorincz, told the court: “We were ultimately strong enough to take you down. Not one by one, but by an army of survivors. We are Jane Does no more.”
The serial sex pest, who is already serving 60 years for child pornography offences, apologised to his victims, telling them: “What I am feeling pales in comparison to your pain, trauma and emotional destruction.
“An acceptable apology to all of you is impossible to write or convey. I will carry your words with me for the rest of my days.”
But the judge revealed Nassar had sent a letter to the court a week earlier insisting his actions were “medical not sexual,” and that he was a “good doctor”.
He accused the women of creating a media frenzy, and said prosecutors had pressured him to admit to things he had not done.
The case has led to questions being asked about how the abuse was allowed to go on for so long under the noses of officials.
Many athletes who testified said they felt betrayed by USA Gymnastics for ignoring their complaints.
Victims claimed the governing body suppressed their accounts of abuse in an attempt to avoid bad publicity.
Earlier this week three board members quit in response.
But John Manly, a lawyer representing some victims, said it was “a public relations ploy to save a sinking ship”