MOSCOW — Women in Chechnya are under pressure to adopt Islamic dress, according to human rights activists and an Islamic fundamentalist video circulating on the Internet in the latest example of deteriorating women’s rights under Ramzan A. Kadyrov, the president of the restive southern Russian republic.

Activists in Chechnya, where Russia has waged two wars against separatists in the past 16 years, said intimidation reached a peak during the fasting month of Ramadan. There was also a crackdown on violations of Islamic law such as the sale of food before sundown and any sale of alcohol, they said.

The activists who spoke from Chechnya insisted on anonymity because they said they feared reprisals.

Threats tapered off, they said, as Ramadan ended in mid-September. Men in Islamic clothes had been approaching women whom they deemed unsuitably dressed to pull them by the arm, an offense according to Chechen custom.