Progressive muscle relaxation on general health and sleep quality of multiple sclerosis caregivers

INTERVENTION: Administration of progressive muscle relaxation Intervention 1: Administration of progressive muscle relaxation. Intervention 2: Routine activity for control group. Rehabilitation Routine activity for control group CONDITION: Demyelinating diseases of the central nervous system Multiple sclerosis. ; Demyelinating diseases of the central nervous system PRIMARY OUTCOME: General health. Timepoint: 3 months. Method of measurement: specific questionnaire. SECONDARY OUTCOME: Sleep quality. Timepoint: 3 months. Method of measurement: specific questionnaire. INCLUSION CRITERIA: INCLUSION CRITERIA: living with patient, having a merit of decision for patients, having a responsibility of patients care Exclusion criteria: Presence of other diseases such as mental disorder, cognitive disorder, addiction, or other neurologic disorder