Medtem ko se zdravstvene študije pogosto osredotočajo predvsem na kakovost in trajanje spanca, so raziskovalci z Univerze v Ouluju na Finskem ugotovili, da je ura, ob kateri se odpravimo spat, prav tako pomembna – še posebej za tiste, ki ponoči ne spijo več kot osem ur, piše Sciencealert.
Vodilni vzrok smrti
Čeprav je bila raziskava omejena na 10-letno obdobje in so se podatki o spanju zbirali le teden dni, so izsledki pomembni. Srčno-žilne bolezni so namreč vodilni vzrok smrti po vsem svetu in terjajo skoraj 18 milijonov življenj na leto.
V raziskavi so s pomočjo nosljivih naprav teden dni spremljali spanje 3231 posameznikov, starih 46 let. Udeležence, ki so spali manj kot osem ur, so razdelili v tri skupine: tiste z rednim, srednje rednim in nerednim spalnim ciklom.
Kot poroča Sciencealert, je bilo tveganje srčno-žilnih bolezni v naslednjem desetletju dvakrat večje pri tistih z nerednim spancem kot pri ljudeh z rednim spancem. Prav tako so ugotovili, da večja nihanja pri odhodih v posteljo negativno vplivajo na zdravje srca. "Naše ugotovitve kažejo, da je prav redno odhajanje v posteljo ključno za zdravje srca," pojasnjuje raziskovalka Laura Nauha. "To odraža ritem našega vsakdana in to, kako močno ta niha."
![EXCLUSIVE: Story from Jam Press (Sleep Liver Problems)Pictured: A social media user reacts to Dr Greg Mongeon's health warning sign.VIDEO: Doctor warns anyone who can't sleep between 2am and 4am may have THIS problemA doctor has gone viral after warning anyone who regularly fails to sleep between 2am and 4am that they may have liver problems – because their "pathways are jammed'.Dr Greg Mongeon, who has 248,000 followers, cautioned that wakefulness at this time could be a symptom of underlying health issues.He explained that each organ has an "alert time" – and usually finding yourself awake during these particular hours of the night might be a big red flag.His revelation left viewers stunned with the video racking up over 278,000 views."Restless sleep is a common symptom people present with," the 48-year-old from Lakeville, Minnesota in the US told What's The Jam."[That might be] waking up early and not being able to fall asleep or not falling asleep easily."In traditional Chinese medicine they talk about each organ having an 'awake' or 'alert' time."And the liver is 2am to 4am."So if you wake up at that time consistently, it's a sign that your body is saying, 'help'."It may be a sign of poor drainage systems, especially the liver and gut."These poor drainage systems are easily tested through laboratory markers."But normal ranges do not indicate optimal [organ] function."The clip, posted three weeks ago, has gone viral with the doctor's fans shocked by the news – with many admitting this exact thing happens to them.Others asked for advice.Angelica said: "I do wake up between that time. But just to pee. Then I fall asleep without a problem. Is that still a problem?"Doctor Greg replied to the question, saying: "If it makes sense to you that you drank a lot of fluid prior to bed, but in many cases, it can indicate your stress hormones are turning on a little too early which is often tied to blood sugar and liver signaling."Athanasia added:.11 Feb 2026Pictured: Story from Jam Press (Sleep Liver Problems)Pictured: Stock image of a woman in bed.VIDEO: Doctor warns anyone who can't sleep between 2am and 4am may have THIS problemA doctor has gone viral after warning anyone who regularly fails to sleep between 2am and 4am that they may have liver problems – because their "pathways are jammed'.Dr Greg Mongeon, who has 248,000 followers, cautioned that wakefulness at this time could be a symptom of underlying health issues.He explained that each organ has an "alert time" – and usually finding yourself awake during these particular hours of the night might be a big red flag.His revelation left viewers stunned with the video racking up over 278,000 views."Restless sleep is a common symptom people present with," the 48-year-old from Lakeville, Minnesota in the US told What's The Jam."[That might be] waking up early and not being able to fall asleep or not falling asleep easily."In traditional Chinese medicine they talk about each orga.,Image: 1074036630, License: Rights-managed, Restrictions: NO Australia, Germany, Norway, South Korea, Sweden, United Kingdom, United States, Unknown Country, Model Release: no](/media/2026/03/31/819003/Wide-profimedia-1074036630-400.webp?1774967329)
Ključna je ura odhoda v posteljo, ne ura bujenja
Zanimivo je, da ura bujenja po podatkih raziskave ni igrala pomembne vloge. Povezava se je pojavila le pri velikih odstopanjih pri večernem odhodu v posteljo. Povečano tveganje pa so opazili samo pri tistih, ki v povprečju spijo manj kot osem ur na noč. Raziskovalci zato menijo, da zadostna količina spanca deluje kot zaščitni faktor, ki nevtralizira nevarnosti nerednega urnika odhodov v posteljo.
Znanstveniki domnevajo, da so za to odgovorni naši naravni 24-urni cikli – cirkadiani ritmi. Nenehno spreminjanje ure odhoda v posteljo zmede te ritme, kar srcu prepreči ustrezno regeneracijo in počitek. Na te vzorce sicer močno vplivajo tudi zunanji dejavniki, kot sta delovna obremenitev in duševno zdravje, ki sta sama po sebi dejavnika tveganja srčnih bolezni.