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Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
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Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
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In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
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Updated: May 12, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study
09:36

Assessment of Child Anthropometry in a Large Epidemiologic Study

Published on: February 2, 2017

Sleep duration and adolescent obesity.

Jonathan A Mitchell1, Daniel Rodriguez, Kathryn H Schmitz

  • 1Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, PA 19104, USA. jmitch@mail.med.upenn.edu

Pediatrics
|April 10, 2013
PubMed
Summary

More sleep in adolescents is linked to lower BMI percentiles, particularly for those with higher body mass index. Increasing sleep duration may help prevent adolescent obesity.

Keywords:
adolescencelongitudinal studyobesitysleep

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Area of Science:

  • Adolescent health
  • Obesity research
  • Sleep science

Background:

  • Short sleep duration is a known risk factor for adolescent obesity.
  • Previous studies often used cross-sectional designs and focused on BMI categories.

Purpose of the Study:

  • To investigate the longitudinal association between sleep duration and changes in Body Mass Index (BMI) distribution among adolescents.
  • To examine how BMI percentiles change from ages 14 to 18 in relation to sleep duration.

Main Methods:

  • Longitudinal study of 1390 adolescents from 9th to 12th grade in Philadelphia.
  • Self-reported height, weight, and sleep hours; BMI calculated (kg/m²).
  • Quantile regression modeled 10th, 25th, 50th, 75th, and 90th BMI percentiles using study wave and sleep duration as predictors.

Main Results:

  • BMI increased significantly from ages 14 to 18, with the most substantial rise at the 90th percentile.
  • Each additional hour of sleep was associated with decreased BMI across all percentiles, with stronger effects at higher percentiles.
  • Increasing sleep from 7.5 to 10 hours at age 18 predicted a 4% reduction in adolescents exceeding a BMI of 25 kg/m².

Conclusions:

  • Adolescent sleep duration influences BMI distribution non-uniformly between ages 14 and 18.
  • Promoting increased sleep, especially for adolescents in the upper BMI range, may be a key strategy for preventing overweight and obesity.