Milyausha MamadalievaEventsThe optimal duration for daytime sleep is 20–30 minutesRecent coverageHow much does it cost to sleep during the day — Вечерняя МоскваDoctor advised Russians to sleep 20-30 minutes during the day at work — ВестиCereva Somnologist: Late Dinner Negatively Affects Skin Tone — Москва 24Neurologist names late dinner as main sleep disruptor — РИАМО