There are various options available for sports organizations. A list of options is shown below:
Erasmus sport
During the academic year, they offer an extensive sports program under the guidance of enthusiastic instructors and trainers. With their huge gym, group classes, clubs and tennis and squash courts, they have something for every taste! See for more information: https://erasmussport.nl/en/.
Sports associations at the EUR
There are more than 20 sports associations at Erasmus University Rotterdam. Most of these use the many sports facilities that the Erasmus Sports Center offers on Woudestein campus.
Click on the link to see the sports associations
Fitness subscriptions
There are plenty fitness clubs in Rotterdam. The ones that are most affordable are Basic Fit and SportCity.