On the top floor of a brownstone, a dozen women were getting ready for a yoga class at the Space, a fitness studio in Crown Heights. Each woman removed her wig and replaced it with a bright scarf in one swift, fluid movement.

This could be any yoga studio in Brooklyn: understated, with large bay windows (curtained at night to discourage onlookers), brick walls and wooden floors lined with yoga mats. Except here there’s no chanting, the sun salutations are slightly modified and are not spoken of as such, and the religious iconography is absent.

“Obviously, no Buddhas,” said Sarah Chanie Benarroch-Brafman, 30, who started the Space to cater to the women in her community, many of whom belong to the Chabad-Lubavitch movement, a Hasidic sect. Ultra-Orthodox women can’t exercise with men, so classes are for women only.

Most students live nearby, like Bassi Werde, 36, who has attended classes since the Space opened two years ago. “It feels like family,” she said after a yoga class on Sunday morning. Her children have taken gymnastics and ballet at Gymies Gym, a sister business for children, on the first floor of the brownstone, also owned by Mrs. Benarroch-Brafman. From the Space’s waiting room you can faintly hear the squeals of delight that often accompany the cartwheeling downstairs.