HACKENSACK, N.J. — When Amalya Knapp performed at a New Jersey State gymnastics competition Sunday, she finally got to show off the skills she honed while training up to 12 hours a week over the last year.

But regardless of how well the 7-year-old Teaneck, N.J., girl did on the floor, bars, beam or vault routines, her scores won’t count toward any individual titles or rankings.

The girls in her age group competed Saturday afternoon while Knapp and her family observed the Jewish Sabbath, a day of rest.

While religious observance requires sacrifices, it can also put parents and their children in a difficult position, balancing the demands of their faith with the vagaries of a team’s schedule.

Orthodox Jewish families, in particular, must navigate the restrictions of the Sabbath, which takes place from Friday at sundown to Saturday evening.

A second-grader at the Yeshiva of North Jersey in River Edge, Amalya has weeknights packed with soccer practice, piano lessons and figure skating classes, but she excels at gymnastics, spending three hours, three nights a week — and sometimes Sundays — at the United States Gymnastics Development Center in Leonia, N.J.

So when she found out the competition would conflict with the Sabbath, she came home “totally devastated,” her mother, Chavie Knapp, said.

Coaches at the gym asked the New Jersey chapter of USA Gymnastics to make an exception for Amalya, who came in first in five of the nine competitions she participated in over the last year.

But the organization was willing only to let her perform in all four events Sunday, with no prospect of placing individually.

“We’ve faced this before, and sometimes the athletes can’t compete at all,” coach Ana Nunes said. “It depends on everyone’s availability.”

Assemblyman Gary Schaer has fired off a letter to USA Gymnastics, calling the decision “unacceptable.”

Schaer, the only Orthodox Jewish member of the New Jersey Legislature, said he penned a letter to Steve Penny, president of USA Gymnastics. He strongly urged the organization to adjust its policies to “ensure all children in New Jersey are able to participate in your competitions.”

“As New Jersey and the United States continue to try and include young people from all religious and racial backgrounds in our pluralistic society, making accommodation for religious observances must be among those efforts,” Schaer wrote.

“I’m sure you would agree about the critical importance in a child’s life of both religious observance and athletic competition and that one should not come at the detriment of the other.”

Leslie King, a spokeswoman for USA Gymnastics, said that Amalya participated in the event, as outlined in the organization’s rules and policies and reiterated that event organizers do their best to find competition dates that are convenient for all.

“At times, these dates will conflict with personal commitments and other obligations for participants, but we do our best to provide alternate opportunities,” King wrote in an e-mail.

Chavie Knapp said she felt encouraged by Schaer’s letter.

“I would like to be able to think, that just like any other child, she will be able to fulfill and maximize her potential,” Knapp said. “It’s hard to watch your child not be acknowledged for everything she’s worked so hard for her over the last year, just because she’s an Orthodox Jew. It’s not fair.”

Had Amalya received an individual rank, she would have placed fifth in the state, Knapp said.

For Amalya, the prospect of not winning an individual title is still hard to swallow, but after talking to her parents and coaches, she’s less upset than she was last week.

“At first, I was really upset because I felt like I worked really hard and I was the only one not going,” Amalya said. “But I feel better about it, and I’m gonna go out there and do my best on Sunday.”

Rabbi Chaim Poupko of Congregation Ahavath Torah in Englewood, N.J., the Orthodox synagogue the Knapps attend, said Amalya’s parents were teaching her an “extremely powerful lesson about her faith.”

“In competitive sports, there are times when we can’t compete,” he said. “Just as there is a commitment towards extracurricular activities, there is a commitment to God and his Torah. That said, we certainly encourage and support our children to get involved in whatever they can, and I think we need to continue to dialogue to find a way that observant Jews can compete.”