Inclusion Criteria:  Aged 45 or over Surgical treatment (fixation or arthroplasty) for a low-energy fracture of the proximal femur (ICD-10 diagnosis S72.0, S72.1, S72.2) as diagnosed on X-rays of the hip and pelvis. Between 3 days and 52 weeks post-surgery  be able to walk 4 meters  -.be available for 24 months following the fracture,  be able to read and understand the briefing note and complete questionnaires feedback express their will and sign a consent to participate in follow-up testing, and to wear the motion sensor The patient must be a member or beneficiary of a health insurance plan  Exclusion Criteria:  Occurrence of one of the following events in the 3 months preceding the consent enlightened  subject with a history of myocardial infarction, Subject hospitalized for unstable angina, Subject with a history of stroke, Subject with a history of coronary bypass surgery (PAC), Subject having had percutaneous coronary intervention (PCI),  Subject having had a cardiac resynchronization therapy device implanted (CRTD),  - Other criteria for non-inclusions  Subject with active treatment for cancer or other malignant disease, Subject with uncontrolled congestive heart disease (NYHA class> 3), Subject with acute psychosis or major psychiatric disorders Subject with continued drug addiction. Subject unable to walk prior to hip fracture treatment. The patient is participating in another interventional category I study, l All categories of persons particularly protected under the law French (adults under guardianship, guardianship or safeguard of justice…. articles L1121-8 - L1121-5 - L1121-6 - L1121-7 - L1121-9 of the Health Code Public)