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Related Experiment Video

Updated: Jun 6, 2026

Automated Measurements of Sleep and Locomotor Activity in Mexican Cavefish

Automated Measurements of Sleep and Locomotor Activity in Mexican Cavefish

Published on: March 21, 2019

Association between sleep duration and body size differs among three Hispanic groups.

Kristen L Knutson¹

¹Department of Medicine, University of Chicago, Illinois 60637, USA. kknutson@medicine.bsd.uchicago.edu

American Journal of Human Biology : the Official Journal of the Human Biology Council

|November 17, 2010

Summary

Shorter sleep duration correlates with larger body size in Mexican-Americans, but not other Hispanic groups. This highlights the need to study obesity factors within specific ethnic populations.

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Area of Science:

Public Health
Anthropology
Epidemiology

Background:

Numerous studies link shorter sleep duration to increased body size.
Research has not specifically examined this association within diverse Hispanic populations.

Purpose of the Study:

To investigate the relationship between sleep duration and body size among Cuban-Americans, Mexican-Americans, and Puerto Ricans.
To determine if sleep duration is a significant predictor of body size within distinct Hispanic ethnic groups.

Main Methods:

Utilized data from the Hispanic Health and Nutrition Examination Survey (HHANES) adult participants (1982-1984).
Employed principal component analysis for body size variable and linear regression models stratified by ethnicity.
Adjusted for covariates including age, sex, education, income, marital status, household size, and acculturation.

Main Results:

Shorter sleep duration was significantly associated with larger body size exclusively in Mexican-Americans.
A 4-hour reduction in sleep was linked to a 0.12 standard deviation increase in body size for Mexican-Americans.
This effect was comparable to the impact of 10 years of aging on body size.

Conclusions:

Findings emphasize the heterogeneity of obesity-related factors across different Hispanic ethnicities.
Combining diverse Hispanic groups in research may obscure significant ethnic-specific associations.