This is an open monocentric study, randomized in two parallel arms with a waiting list.
The duration of the physical activty will vary according to the duration of the treatment: from 2 to 6 months.
Several questionnaries (fatigue, quality of life, ...) will be given to patients at the inclusion, at the end of the period of treatment and 3 to 6 months after the end of treatment.
One hundred patients are necessary in this study (fifty in each arm). We expect to a stability of the fatigue in Arm A compared to an increase of the fatigue in arm B.
