Lambda Health System SA is a medtech spin-off from the University Hospital of Lausanne (CHUV) in Switzerland. Our first product, the Lambda, is an innovative rehabilitation device for people with locomotor disabilities. It is a seated device for the mobilization of the lower limbs. This device could be used in different fields of physical rehabilitation, such as neurorehabilitation, orthopedics and geriatrics. It could be coupled with different serious games with 2 mains goals. The first one is to improve the motivation : rehabilitate while playing, achieving goals and levels, earning points, etc. The second is to give a real-time feedback to the patient in order to improve the motor learning.