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Category: Sleep

Why You Wake Up Groggy: Sleep Inertia Explained

Posted on October 11, 2026September 25, 2026 By Nightwell No Comments on Why You Wake Up Groggy: Sleep Inertia Explained

Here’s a slightly alarming finding. In a well-known study published in JAMA in 2006, researchers tested people’s thinking skills in the first few minutes after they woke up. On some measures, they performed worse than they did after staying awake for more than a full day. That fog has a name: sleep inertia. It’s the…

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Sleep

Does Melatonin Actually Work? What the Evidence Says

Posted on October 4, 2026September 24, 2026 By Nightwell No Comments on Does Melatonin Actually Work? What the Evidence Says

Walk into a pharmacy in the United States and you’ll find melatonin next to the vitamins — in tablets, gummies, sprays, sometimes in 10 mg doses, often right beside the children’s section. Walk into a pharmacy in the UK and you can’t buy it at all without a prescription. Same hormone. Very different ideas about…

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Sleep

Sleep Stages Explained: REM vs Deep Sleep

Posted on September 27, 2026September 24, 2026 By Nightwell 1 Comment on Sleep Stages Explained: REM vs Deep Sleep

Let’s follow one ordinary night, hour by hour. Lights out at 11 p.m., alarm at 7. Nothing special happens — no nightmares, no 3 a.m. crisis. And yet your brain goes through something like five complete cycles, switching between states that are about as different from each other as sleeping is from being awake. Understanding…

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Sleep

Can You Catch Up on Sleep? What Sleep Debt Really Means

Posted on September 20, 2026September 7, 2026 By Nightwell No Comments on Can You Catch Up on Sleep? What Sleep Debt Really Means

The short answer Sleep hygiene is the set of everyday habits and bedroom conditions that make good sleep more likely — things like a steady schedule, a cool dark room, and an unhurried wind-down. For most people, it is the single most useful foundation for better sleep, but it is a foundation, not a cure….

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Sleep

The Best Mattress for How You Sleep: Our Two Picks

Posted on September 15, 2026 By Nightwell No Comments on The Best Mattress for How You Sleep: Our Two Picks

Advertising disclosure: This article contains affiliate links. If you buy through one, Nightwell may earn a small commission at no extra cost to you. We only recommend products we believe genuinely fit the advice on this page. The short answer The best mattress isn’t the most expensive one or the one with the biggest advert…

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Sleep

What Sleep Hygiene Really Means (And What It Can’t Fix)

Posted on September 15, 2026September 15, 2026 By Nightwell No Comments on What Sleep Hygiene Really Means (And What It Can’t Fix)

Advertising disclosure: This article contains affiliate links. If you buy through one, Nightwell may earn a small commission at no extra cost to you. We only link to products we believe genuinely fit the advice on this page. The short answer Sleep hygiene is the set of everyday habits and bedroom conditions that make good…

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Sleep

Can You Catch Up on Sleep? What Sleep Debt Really

Posted on September 13, 2026September 7, 2026 By Nightwell No Comments on Can You Catch Up on Sleep? What Sleep Debt Really

The short answer Yes and no — and the distinction matters. You can recover from a bad night or one rough week, but you cannot fully repay chronic sleep debt by sleeping in on the weekend. A couple of solid nights will restore your mood, alertness, and energy after a short-term shortfall. What a weekend…

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Sleep

Snoring: Causes, Simple Fixes, and When to Worry

Posted on September 4, 2026September 15, 2026 By Nightwell No Comments on Snoring: Causes, Simple Fixes, and When to Worry

Advertising disclosure: This article contains affiliate links. If you buy through one, Nightwell may earn a small commission at no extra cost to you. We only link to products we believe genuinely fit the advice on this page. The short answer Snoring is incredibly common — more than a quarter of adults do it regularly…

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Sleep

How Blue Light Really Affects Your Sleep

Posted on September 4, 2026 By Nightwell 1 Comment on How Blue Light Really Affects Your Sleep

The short answer Blue light does affect your sleep — but not as dramatically as the glasses, filters, and “night mode” marketing would have you believe. The honest version: any bright light in the evening can delay the sleep hormone melatonin, and blue wavelengths do it a little more efficiently than others. But how bright the…

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Sleep

Magnesium for Sleep: What the Evidence Shows

Posted on September 4, 2026 By Nightwell No Comments on Magnesium for Sleep: What the Evidence Shows

The short answer Magnesium is one of the few sleep supplements with genuine research behind it — but the effect is small, and the marketing wildly oversells it. The honest version: it helps most if your diet is genuinely short on magnesium (which is common), it works by correcting a shortfall rather than acting like a…

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Sleep

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