What is the halacha about a frum yid going to a yoga studio to exercise?
The concern is for a man going to a mixed class, in which he will inevitably come into contact with immodestly clad women. If this concern can be taken care of, for instance by organizing a men’s group, then there is no prohibition.in yoga or the studio per se.
Sources: It is not permitted to intentionally go to a place where one will come into contact with immodesty, unless there is “no other way” (Bava Basra 57b). Yoga would not generally be considered “no other way,” and a men’s group should be organized.