The effects of partial sleep restriction and altered sleep timing on olfactory performance.

The effects of partial sleep restriction and altered sleep timing on olfactory performance.

Eur J Clin Nutr. 2017 Jul 12;:

Authors: McNeil J, Forest G, Hintze LJ, Brunet JF, Doucet É

Abstract
Olfaction can increase the drive to eat and may partially explain the consistent increases in energy intake (EI) following sleep restriction. We investigated the effects of 50% sleep restriction with altered sleep timing on olfactory performance. We also evaluated whether changes (Δ) in olfactory performance were associated with Δ24 h EI. Twelve men and six women (age: 23±4 years; BMI: 23±3 kg/m(2)) completed three randomized cross-over conditions: habitual sleep duration, 50% sleep restriction with advanced wake-time, and 50% sleep restriction with delayed bedtime. Sleep was measured in-laboratory (polysomnography). Olfactory performance ('sniffin sticks') and 24 h EI (food menu) were evaluated the next day. A trend for a significant condition*sex interaction was noted for threshold-discrimination-identification (TDI) scores (P=0.09); TDI scores were lowest in women and highest in men, following sleep restriction with advanced wake-time. Δolfactory performance were not associated with Δ24 h EI. The impact of sleep restriction on olfactory performance may differ between sexes. Changes in olfactory performance were not associated with changes in 24 h EI. Studies investigating prolonged effects of sleep loss on the relationship between olfactory performance with EI are needed.European Journal of Clinical Nutrition advance online publication, 12 July 2017 ; doi:10.1038/ejcn.2017.109.

PMID: 28699628 [PubMed - as supplied by publisher]

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