Take your workout out of the gym and into the open air at Diversion en la Granja. It's the perfect place to do some situps, stretches or even some yoga.
When you've spent some time at this Torrejón de Ardoz amusement park, why not check out Parque Europa, University of Alcala, and Convent of Las Clarisas de San Diego? They're not far from Diversion en la Granja and also popular with many travelers.