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Updated: May 22, 2026

Multidisciplinary Approach to Obesity Management: A Case Report

Multidisciplinary Approach to Obesity Management: A Case Report

Published on: May 30, 2025

Social jetlag and obesity.

Till Roenneberg¹, Karla V Allebrandt, Martha Merrow

¹Institute for Medical Psychology, University of Munich, Munich, Germany. roenneberg@lmu.de

Current Biology : CB

|May 15, 2012

Summary

Social jetlag, the mismatch between your body clock and social schedules, is linked to higher body mass index (BMI). Aligning biological and social clocks may help manage obesity.

Area of Science:

Chronobiology
Epidemiology
Obesity Research

Background:

Obesity is a major public health issue in industrialized nations.
Sleep duration and circadian rhythms are known factors influencing body mass index (BMI).
Social jetlag, a mismatch between internal circadian timing and social schedules, leads to chronic sleep loss.

Purpose of the Study:

To investigate the association between social jetlag and increased BMI in a large-scale epidemiological study.
To determine if social jetlag contributes to weight gain beyond the effects of sleep duration.

Main Methods:

Large-scale epidemiological study design.
Analysis of factors influencing body mass index (BMI).
Quantification of social jetlag and its correlation with BMI.

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Main Results:

Social jetlag is significantly associated with increased BMI, independent of sleep duration.
Living out of sync with one's biological clock ("against the clock") is a potential contributor to obesity.
Findings highlight the role of circadian rhythm disruption in weight-related pathologies.

Conclusions:

Social jetlag is a significant factor associated with increased BMI and obesity.
Aligning biological clocks with social schedules may be a strategy for obesity management.
Results have implications for public health policies regarding Daylight Saving Time, work, and school schedules.