Multimodal Geriatric Pre-authorization Before Scheduled Orthopedic Surgery (PRE4OS)

The main objective of this multicentric, prospective and interventional study is to assess the feasibility of multimodal prehabilitation in patients aged 75 years or older with surgical indication for coxarthrosis or severe gonarthrosis

This study consists of a pre-established surgical preparation program in cooperation with physiotherapists or physical activity instructors, dieticians, psychologists, physical therapists and nurses. This innovative program improves muscle strength, balance and walking of the study patients. It also allows for faster and better recovery of their physical fitness and intellectual abilities after surgery. These interventions will be performed in day admission (DA) and at home and will consist of training, a diet program to strengthen the muscles and balance of the patients participating in the study. Patients who agree to participate in the study will receive interventions for 6 weeks prior to surgery, partly in a day hospital and partly at home, including: Muscle rehabilitation developed with a physiotherapist or physical activity instructor Nutritional support (dietician at 1st, 3rd, and 6th day admission (DA), referring geriatrician) Cognitive and physical stimulation "Exergame" (Genious Healthcare); with only cognitive exercises at home Psychological support by a psychologist Information in the form of videos on the main risks and important points to know and prepare before and after surgery 1 follow-up call per week made by the PRE4OS referent between each day admission (DA) to assess patient satisfaction, any limitations encountered, possible exercises at home, the occurrence of possible adverse effects 1 hour per week home adapted physical activity session by the Siel Bleu association

Multimodal prehabilitation will be carried out over a period of 6 weeks in a day admission (once a week) and at home, and will include: Muscle rehabilitation developed with a physiotherapist or physical activity monitor Nutritional support (dietitian at the 1st, 3rd, and 6th day admission (DA)) Cognitive and physical stimulation "Exergame" Psychological support by a psychologist Information in the form of videos on the main risks and important points to know and prepare before and after surgery Assessment of patient satisfaction, any limitations encountered, the possible performance of exercises at home and the occurrence of any adverse effects. One session of adapted physical activity at home of one hour per week by a physical trainer from the Siel Bleu association

The answers given to ED-5D permit to find 243 unique health states or can be converted into EQ-5D index an utility scores anchored at 0 for death and 1 for perfect health

Cognitive and physical stimulation "Exergame" (Genious Healthcare); with realization only of cognitive exercises at home without including minimum and maximum values

Assessment of the degree of patient dependence according "Index of Independence in Activities of Daily Living" KATZ scale

This is a measurement of the subject's ability to perform activities of daily living independently. The Index ranks adequacy of performance in the six functions of bathing, dressing, toileting, transferring, continence, and feeding. A high score (6) indicates full function (patient independent). 2 or less score, indicates severe functional impairment.(patient very dependent)

Assessment of patient's level of dependence through an appreciation of instrumental activities of daily living according Lawton scale

Assessment of older people: Self-maintaining and instrumental activities of daily living without including minimum and maximum values

the aim of this score is to identify and assess risk factors for depression in elderly patients without including minimum and maximum values. If the score is greater than or equal to 1: high probability of depression. If the score is 0: high probability of no depression.

The Oxford Knee Score (OKS) measures the degree of knee pain and functional status of the knee on a scale ranging from 0 to 48: Score 0 to 19: May indicate severe arthritis of the knee Score 20 to 29: May indicate moderate to severe knee arthritis Score 30 to 39: May indicate mild to moderate knee arthritis Score 40 to 48: May indicate satisfactory joint function

The Oxford hip Score (OHS) assesses pain (6 items) and function (6 items) of the hip in relation to daily activities on a scale ranging from 0 to 48: Score 0 to 19: May indicate severe hip arthritis Score 20 to 29 May indicate moderate to severe hip arthritis Score 30 to 39 May indicate mild to moderate hip arthritis Score 40 to 48 May indicate satisfactory joint function

Inclusion Criteria: Age ≥ 75 years Surgical indication for total hip or knee replacement for hip or knee osteoarthritis. Minimum time of 6 weeks between inclusion visit and date of surgery Physical (excluding coxarthrosis or knee osteoarthritis) and cognitive capacities to follow a prehabilitation program (assessment by the geriatrician) Proximity between place of life and hospital to go to the center for pre-rehabilitation Good understanding of the French language Benefiting from social coverage Have read the information notice and have consented to participate in the study by signing a written consent Exclusion Criteria: Urgent surgery (trauma, acute dislocation) Neurocognitive disorders at a moderate or severe stage (Mini Mental State Examination (M.M.S.E) ≤20), or not evaluable and not allowing to participate in the prehabilitation program Lack of social coverage (beneficiary or beneficiary) Adult persons subject to a legal protection measure (curatorship, guardianship and safeguard of justice) Refusal to participate Hospitalized patients ( the living space can be the home or thelon term care).