Effect of the lockdown on circadian rhythms in patients on a bariatric surgery healthcare path FRESH-PEF73930-en Anne-Laure BOREL Effect of the lockdown on circadian rhythms in patients on a bariatric surgery healthcare path CHRONO-CONF FRESH-PEF73930-en 73930 FRESH-PEF73930 Anne-Laure BOREL CENTRE HOSPITALIER UNIVERSITAIRE DE GRENOBLE Epidemiology France Portal (PEF) null Anne-Laure;BOREL Obesity sleep metabolism Endocrinology Obesity COVID-19 Evaluate the influence of lockdown at home on changes in sleep and food intake times among subjects with a history of obesity. Secondary objectives: 1. Changes in weight during the lockdown 2. Changes in quality of life during the lockdown 3. Changes in the amount of physical activity during the lockdown 4. Changes in psychological wellbeing during the lockdown 5. Work-related changes during the lockdown 6. Changes in food security during the lockdown 7. Changes in the relationship between variations in circadian rhythm and variations (1) in weight, (2) physical activity, (3), psychological wellbeing null France Individuals Patients population Male Female Young Adult (19 to 24 years) Adult (25 to 44 years) Middle Aged (45 to 64 years) Aged (65 to 79 years) Aged, 80 and over (80 years and more) Inclusion criteria : Adult subjects on pre- and post-bariatric surgery healthcare paths at Grenoble Alpes University Hospital and Métropole-Savoie Hospital (CHMS). Subjects with an email address and internet access. Subjects refusing to participate Subjects having stayed in a country which did not organise a lockdown during the COVID-19 pandemic. Secondarycriteria: Some subjects will not be eligible for inclusion if their telephone contact details have changed, or if they do not have an email address or internet access. Does the study include individuals without any disorders? no Recruitment procedures for interviewed individuals: All patients followed up at Grenoble Alpes University Hospital since 2013 and Métropole-Savoie Hospital (CHMS) since 2016 as part of their healthcare path for bariatric surgery will be sent an email inviting them to take part in the study. Procedures for informing subjects and recording non-objection: This email will include information on the study, allowing the subjects to object to the use of their data in the study. Participant-reported health data Quality of life/health perception Other Disease and death registry [500-1000[ individuals Converting or copying information into a structured record Interview with the participant (including clinical) Observational Study Observational Study Cohort study 500 Unknown To be defined