Schizophrenia Spectrum &Amp; Other Psychotic Disorders

This project aims to evaluate feasibility, validity and clinically applicability to systematically measure fitness in patients with severe mental illness. The research project is a validation study using a cross-sectional design. The project will include 50 people with severe mental illness and 25 healthy controls without present or previous mental illness. The protocol includes a baseline visit where three different ways of measure fitness will be carried out, and a 14-day period of physical activity monitoring.