As part of a collaboration between the Centre Sport et Santé of The University of Lausanne and the sports psychologist Mattia Piffaretti, a physical activity program has been adapted for 29 patients suffering from multiple sclerosis. The 29 patients were divided into three research groups. The first group EX (n=5, age=50.6±9.8) followed a bi-weekly physical activity intervention program for a total of 12 weeks in addition to their usual medical treatment.