Effects of Aerobic Exercise, Cognitive Remediation and Combined Intervention in Schizophrenia

The investigators will address the following objectives: * Primary objective: o assess, through a randomized controlled trial (RCT), the efficacy and feasibility of a combined intervention (CR + AE) in patients with schizophrenia. The primary outcome measure will be cognitive performance, while secondary outcomes will include scales for the assessment of psychopathology, daily functioning, and quality of life. * Secondary objectives: to evaluate changes in bio-physical and laboratory metabolic parameters, as well as in neurotrophic and neuroinflammatory factors. Furthermore, multimodal magnetic resonance imaging (MRI) parameters will be evaluated after the interventions, and their relationship with observed cognitive improvements will be explored.