Heat tolerance after total and partial acute sleep deprivation

Evgenia Muginshtein-Simkovitch, Yaron Dagan, Mairav Cohen-Zion, Barliz Waissengrin, Itay Ketko, Yuval Heled*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Sleep deprivation (SD) is suggested to be associated with reduced thermo-regulatory functions. This study aimed to quantify the effect of partial (PSD) and total (TSD) 24h SD using a standard heat tolerance test (HTT). Eleven participants underwent HTT after well-rested state, PSD and TSD. No significant physiological differences were found between the exposures but subjective discomfort was higher after TSD. Evening chronotypes' temperature during HTT was higher after TSD compared with PSD (p = 0.017). After TSD, evening chronotypes compared to intermediate chronotypes' temperature was higher during the first hour of the HTT (p<0.05), suggesting that thermo-regulatory function during exercise in the heat is influenced by chronotype.

Original languageEnglish
Pages (from-to)717-724
Number of pages8
JournalChronobiology International
Issue number5
StatePublished - 1 Jun 2015
Externally publishedYes


  • Chronotypes
  • Heat tolerance
  • Sleep
  • Sleep deprivation


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