Maedeh Hojabri, who was born in Tehran, practiced gymnastics for few years before participating in the sport of Parkour, a training discipline using movement that developed from military obstacle course, which is the reason for her current accusation.
Hojabri had posted about 300 videos to her almost 600,000 followers, many that showed her dancing, sometimes in mid-riff baring tops and tight jeans, without a hijab, which is required in public.
Iran State TV broadcast a video on Friday in which Hojabri acknowledged breaking "moral norms" while insisting that was not her intention.
It shows her without a mandatory headscarf, which is obligatory in the conservative Islamic republic.
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Her account, which has been suspended, was reported to have had more than 600,000 followers.
It is not known whether her public statement of admission was made under duress. Instagram, like many other social networks (Facebook, Twitter, YouTube, Telegram), undergo periodic interlocks in the country. She was among the many Instagram users arrested by authorities for posting videos on the social media platform in recent weeks.
"It wasn't incitement, I didn't want to encourage anyone, I didn't have an objective", she said. Men and women are banned from dancing in public.
"It wasn't for attracting attention", she said in the television speech.
"For centuries people have uncovered themselves and danced and this religion wasn't harmed", Iranian cleric Mohammad-Reza Zaeri wrote on his Instagram page. Iranian-American journalist Arash Sigarchi tweeted: "40 years ago, dance were taught in school in Iran but after the Islamic revolution 1979 it became a big crime!" In 2014, six people who appeared in an online video dancing to Pharrell Williams' hit song "Happy" on the streets were sentenced to a one-year jail term and 91 lashes.