Lawrence G. Nassar, the former U.S.A. Gymnastics and Michigan State University sports medicine doctor, was sentenced in a Michigan court on Monday to 40 to 125 years in prison for criminal sexual conduct toward girls at a gymnastics facility.

Judge Janice K. Cunningham announced the sentence in Eaton County Circuit Court in Charlotte, Mich., at the end of a sentencing hearing in which more than 60 young women and teenagers read or presented victim impact statements.

The sentence was based on Dr. Nassar’s November guilty plea to three counts of criminal sexual conduct, two of them against girls between the ages of 13 and 15, and one against a girl younger than 13. The abuse took place at Twistars Gymnastics Club, outside Lansing, Mich., between September 2009 and September 2011, the plea agreement said.

The gym was supposed to catapult young female athletes to fruitful careers under the guidance of John Geddert, who owned the gym and coached there. Mr. Geddert coached the U.S. Olympic team in 2012.