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Macarena Valladares1, Brianda Campos, Camila Zapata

  • 1Departamento de Ciencias Químicas y Biológicas. Facultad de Salud. Universidad Bernardo O Higgins. Santiago, Chile. macarena.valladares@ubo.cl.

Nutricion Hospitalaria
|December 22, 2016
PubMed
Summary

Evening chronotypes, characterized by later sleep-wake cycles, are linked to larger waistlines and higher body fat percentages in young adults. This finding highlights chronotype as a potential factor in obesity prevention and treatment strategies.

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Area of Science:

  • Chronobiology
  • Human Physiology
  • Nutritional Science

Background:

  • Circadian rhythms, governing sleep-wake cycles, manifest as individual chronotypes (morning or evening types).
  • Evening chronotypes have been associated with reduced sleep duration and unhealthy dietary patterns.
  • A propensity towards evening chronotypes is linked to an increased risk of developing obesity.

Purpose of the Study:

  • To investigate the association between chronotype and anthropometric variables in young adults aged 18 to 25.
  • To determine if specific chronotypes correlate with key indicators of body composition and fat distribution.

Main Methods:

  • A cohort of 65 young adults (18-25 years) participated in the study.
  • Chronotype was assessed using the Horne-Ostberg questionnaire.
Keywords:
Cronotipo. Obesidad. Jóvenes.

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  • Anthropometric measurements included weight, height, body fat percentage, and waist circumference.

    • Main Results:

    • Men with an evening chronotype exhibited a significantly larger waist circumference (p = 0.03).
    • Women with less than 25% body fat were associated with an evening chronotype (p = 0.05).

    Conclusions:

    • Evening chronotype is associated with increased waist circumference and higher body fat percentage.
    • Chronotype represents a novel target for the prevention and management of obesity.