Marfan syndrome (MFS) is characterized by the association of multisystem damage related
to connective tissue fragility. The risk of aortic dissection has diverted attention from
significant musculoskeletal damage despite commonly reported extreme fatigue and pain
with impact on the patient's quality of life. In a recent study (Marfanpower,
NCT03236571), investigators have observed reduced endurance capacities in children and
teenagers with MFS (average VO2 peak at 60% of expected), which were significantly
increased by an intensive rehabilitation program. Based on this experience, investigators
aim to evaluate the effect of a physical activity program adapted to the daily life of
the young patients on their endurance capacities and their quality of life. This program
will be set up by an adapted physical activity (APA) coach after a complete assessment,
including a cardiopulmonary exercise test with VO2 peak measurement, which will be
carried out in the Reference Centre for Marfan syndrome at the Toulouse University
Hospital. The VO2 peak evolution will be evaluated after 6 months of program. This is a
recognized parameter for the evaluation of endurance and has been validated in children.
Investigators hypothesize that the implementation of a physical activity program adapted
to the daily life and interests of the child with MFS will efficiently improve endurance,
prevent deconditioning and promote long term benefits.