a mamin:
how can you say that women should exercise? Has anyone asked a shaila to a Gadol about this? Has anyone gotten a hechsher for any particular type of exercise? Has a Gadol paskened the proper attire for women who wish to exercise? The proper amount of time women should spend on this activity?
Until there is a clear psak on this issue I don’t know how you can say this so definitively. Even if you consider it a medical/health issue, surely one must ask a Rav just as one would ask a Rav before consuming medicine that might not be kosher.