Hi Flavinha,

There are quite a lot of gym's in Doha. I have been here for one month & have seen many. Not sure how many are just male or female only, but try Golds' near the airport, the gym within Rydges hotel, Bio Bil opposite the City Centre, or join the Resort /hotels like the Intercontinental. There is another, but can't remember where it is, but is is opposite a fantastic coffee/juice shop. When i remember i shall let you know.