well.sister, Exercise is permissible unanimously. not only but also as muslim its one of our imposed duty to prepare ourselves from against the kuffar. ALLAH says in quran (al anfal 60) ..and exercise is first step of it..but… ~yoga is hindus tradition though here may have exercise . its related with `shirk” and also its imported from buddiism.in some yoga`s method are kept resemblance with contradiction our basic “AQIDAH” So its not permissible. but you can jim, so and so by maintaining islamic law like separate from male, and covering your body from other. etc, hope you got …jazakallah for your question.
Answered by ARIFUL ISLAMFiqh department: iom.