Is it permissible to exercise in a women-only gym that uses music during workouts, given that there is no other hall or trainer available that does not use music?

There is no objection to a woman practicing sports in a place designated for women, away from men, provided that it does not distract her from her duties, such as prayer. The use of music in sports exercises must be avoided, as musical instruments are unanimously forbidden, as stated in the noble Prophetic Hadeeth that associates them with adultery, alcohol, and silk. Scholars, such as Sheikh Al-Islam Ibn Taymiyyah and Sheikh Abdul Aziz Bin Baz, have affirmed the prohibition of music, stating that it is a disease and not a cure, and that it cultivates hypocrisy in the heart. Therefore, those who use it should be advised, and if they do not stop, one must leave this place and seek an alternative.