Type: Randomized controlled trial
Registration: PMID: 32819191
Status: Published
Tags: Caffeine, Fatigue & alertness, Night‑shift workers, RCT, Safety (workplace)
External URL: https://pubmed.ncbi.nlm.nih.gov/32819191/
Compared caffeine‑nap vs placebo; improved vigilant attention and reduced subjective fatigue after the nap window.
This RCT how brief, scheduled on‑shift naps (timing/length) showed sleep & alertness for night‑shift workers and night owls. Findings add structure to the idea that the circadian low can be managed by how rest is divided and timed on duty. For people who work nights, that frames an everyday choice (when you eat, how you light the end of a shift, how rest is split) as part of the mechanism, not just routine.
Shift‑work context pilot.