24-h core temperature in obese and lean men and women

Mindy E. Hoffmann, Sarah M. Rodriguez, Dinah M. Zeiss, Kelley N. Wachsberg, Robert F. Kushner, Lewis Landsberg, Robert A. Linsenmeier*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Maintenance of core temperature is a major component of 24-h energy expenditure, and its dysregulation could contribute to the pathophysiology of obesity. The relationship among temperature, sex, and BMI, however, has not been fully elucidated in humans. This study investigated core temperature in obese and lean individuals at rest, during 20-min exercise, during sleep, and after food consumption. Twelve lean (18.5-24.9 kg/m2) and twelve obese (30.0-39.9 kg/m2) healthy participants, ages 25-40 years old, were admitted overnight in a clinical research unit. Females were measured in the follicular menstrual phase. Core temperature was measured every minute for 24 h using the CorTemp system, a pill-sized sensor that measures core temperature while in the gastrointestinal tract and delivers the measurement via a radio signal to an external recorder. Core temperature did not differ significantly between the obese and lean individuals at rest, postmeals, during exercise, or during sleep (P 0.5), but core temperature averaged over the entire study was significantly higher (0.1-0.2 °C) in the obese (P = 0.023). Each individual's temperature varied considerably during the study, but at all times, and across the entire study, women were ∼0.4 °C warmer than men (P 0.0001). These data indicate that obesity is not associated with a lower core temperature but that women have a higher core temperature than men at rest, during sleep, during exercise, and after meals.

Original languageEnglish (US)
Pages (from-to)1585-1590
Number of pages6
Issue number8
StatePublished - Aug 2012

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Nutrition and Dietetics


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