Research

Hormonal

In primary care populations, higher BMI categories (overweight and obese) are associated with significantly reduced total sleep time compared to normal weight individuals, with a linear inverse relationship observed up to obesity.

If you are overweight or obese, your sleep duration may be shorter than that of normal-weight individuals. While this study is observational, it suggests that prioritizing sleep duration (even small increases, such as 20 minutes per night) could be a low-risk, high-reward strategy to support weight management efforts alongside diet and exercise.

ModerateSupportsMEDIUM confidence
overweight and obese patients slept less than patients with a normal BMI (patients reported less sleep in a nearly linear relationship from the normal through the obese group)
Robert Daniel Vorona et al. · Archives of Internal Medicine · 2005

Why this rating

Observational study with self-reported sleep data; large sample size (n=924) but potential for reporting bias.

Source

Overweight and Obese Patients in a Primary Care Population Report Less Sleep Than Patients With a Normal Body Mass Index

Robert Daniel Vorona et al. · Archives of Internal Medicine · 2005

DOI 10.1001/archinte.165.1.25

cross_sectional · n=924Cited 404×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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