We tend to talk about sleep as one thing: either you slept, or you didn’t. But a good night is a bit like a train journey. There’s boarding, the ride itself, and arriving at your destination. If any one of the three goes wrong, you can still step off feeling like you didn’t get anywhere.
Most sleep advice only covers the first part. Let’s look at all three.
1. Settling in: giving your body a runway
Think of a ceiling fan. When you switch it off, it doesn’t stop at once. It keeps spinning, slowly winding down. Your body and mind do the same after a long day, which is why you can’t always go from full speed to asleep the moment the light goes off.
One of the best-studied ways to help is wonderfully homely: a warm bath or shower. A review of 17 studies found that bathing in warm water, about 40 to 42.5°C, one to two hours before bed helped people fall asleep faster, by about 10 minutes on average, and improved how well they slept.1 Even 10 minutes was enough to make a difference.
The likely reason is that your body temperature naturally dips as bedtime approaches, and warm water seems to give that cooling a gentle push.2 The same idea applies to your mind: a calmer, dimmer hour before bed helps it slow down too.
2. Staying asleep: the ride matters as much as the start
Here’s something that surprises many people. It isn’t only how long you sleep. It’s also how unbroken it is.
In one study, healthy adults who were woken several times a night had a bigger drop in positive mood than people who got the same shortened sleep without interruptions, and the effect built up over three nights.3 In another, broken sleep left people more tired the next day even though their total sleep time was similar.4
When sleep keeps getting interrupted, you don’t get to settle into the deeper stages that feel most restoring. That’s how you can spend a full night in bed and still feel like you never quite got there.
3. Arriving: waking up fresh
Even a good night ends with a short spell of grogginess called sleep inertia. It’s normal, and it usually fades within 15 to 60 minutes of waking.5
You can ease it along. Waking at roughly the same time each day, getting some natural light and using a gentle alarm all help.6 And if you tend to hit snooze, a few extra minutes in bed won’t make the grogginess disappear.
Putting it together
Settling in, staying asleep and waking fresh each need something different. Most tips focus on the first: how to fall asleep. A truly restful night needs all three: relaxation to begin with, unbroken rest in the middle, and a clear start to the morning.
Habits do much of the heavy lifting. And if poor sleep carries on for weeks, it’s worth talking to a doctor. We’ve also been working on something built around exactly these three parts, and we’ll share more soon.
For the curious, here are the references behind the research mentioned above: