Exercise, Food & Habits For Better Sleep
You don't need a gadget, a tracker or a cupboard full of pills. Most of the bad nights I hear about come down to a handful of ordinary habits — what you eat in the evening, when you train, and how you spend the last hour of the day.
Nearly every client who comes to me wanting more energy is, underneath it, someone who isn't sleeping enough. And almost none of them need anything clever to fix it.
Sleep is the thing people are most willing to sacrifice and most surprised to miss. I've had clients spend a fortune on supplements, rings and mattresses while still drinking coffee at four in the afternoon and finishing a heavy session at half nine at night. The boring stuff was never addressed, and the boring stuff is usually what's doing it.
So this is the plain version. What you eat in the evening, when you train, what to do with the last hour before bed, and how to train sensibly on the days you've slept badly anyway. No mechanisms, no biohacks, no shopping list. Just the habits I actually go through with people in the studio.
First, The Honest Bit
I'm a personal trainer. I'm good at training, food and habits, and those three things genuinely account for a lot of poor sleep. But they don't account for all of it, and I want to be straight with you about where my job stops.
If you've been sleeping badly for weeks on end, if you're waking up wrung out no matter how long you were in bed, if your partner is worried about how you sleep, or if this started alongside a change in your health, your mood or your medication — that is a conversation for your GP, not for me. There are plenty of reasons for a run of bad nights that no amount of walking and early dinners will touch, and a GP can look into them properly. Please go.
What follows is for the far more common situation: you sleep alright, more or less, but you'd like to sleep longer and wake up feeling like you've actually rested. That, I can help with.
How You Eat In The Evening
This is where I'd start with most people, because it's the easiest to change and it tends to give the quickest return.
Stop making dinner the biggest meal of the day
Our whole culture is built around a huge evening meal. It's when families eat together, it's when we go out, and for a lot of people it's the only proper sit-down of the day. I'm not going to tell you to give that up. But if you go to bed genuinely full, most people don't settle well, and a lot of my clients recognise that feeling immediately once I describe it — lying there uncomfortable, too warm, shifting about.
The fix isn't dramatic. Push yourself away from the table at about eighty per cent full rather than stuffed. Spread more of your food across breakfast and lunch so dinner isn't carrying the whole day. And if you can, leave a couple of hours between finishing dinner and going to bed rather than eating at nine and being upstairs at ten.
Walk after dinner
Ten or fifteen minutes round the block after your evening meal is one of the best-value habits I know. It helps you feel comfortable rather than heavy, it gets you outside, and it's a natural full stop on the day. It also gets your step count up without any extra effort, which I've written about in my piece on the 10,000 steps myth. Take the dog, take a partner, take nobody. It doesn't need to be brisk.
Don't go to bed hungry either
The flip side catches people out, and I see it most in clients who are dieting hard. If you've dropped your food right down, you can end up in bed genuinely hungry, and that makes for a restless, broken night. If that's you, it usually means the diet is too aggressive rather than that you need something at bedtime.
Eating enough overall — and getting enough protein across the day — tends to sort this out on its own. If you're dieting and sleeping badly, look at how hard you're cutting before you look at anything else.
The Two That Catch Everyone Out
If I could only change two things about how people drink, it would be these. Both are completely ordinary, both feel harmless, and both come up constantly.
Afternoon coffee
Caffeine hangs around far longer than people expect. The three o'clock coffee that feels like it wore off by five is very often still with you at eleven. Most people who tell me caffeine "doesn't affect them" have simply never gone without it long enough to find out.
Try setting a cut-off. Early afternoon works for most people, and some need to make it lunchtime. Give it a fortnight before you judge it, because the first few days of moving your last coffee earlier are genuinely annoying and tell you nothing. And check the things you don't count as coffee — energy drinks, pre-workout, green tea, some soft drinks and a surprising number of "wellness" powders all carry caffeine.
The nightcap
This is the one people least want to hear, so I'll be quick about it. Alcohol will help you fall asleep. It will not help you sleep. A drink or three in the evening very reliably produces the pattern people describe to me as "I went out like a light and then woke up at three and couldn't get back off".
I'm not telling you never to have a drink. I'm telling you that if you're having a few most evenings and wondering why you wake up feeling rough, you've probably already found your answer. Try a week without and see what your nights do. Most people are quietly annoyed by the result.
When You Train Changes Your Night
This is my actual area, and it's the part most people have never thought about. Training is good for your sleep. Training at the wrong time for you can quietly wreck it.
Get outside early
If you take one thing from this page, take this. Twenty to thirty minutes outside in the morning — a walk to work, the school run on foot, the dog, a coffee in the garden — is the cheapest and most reliable habit I know for people who struggle to settle at night. It's free, it takes no equipment, and clients report back on it more than almost anything else I give them. Grey Leeds mornings still count. You don't need sunshine, you need to be outdoors.
Keep the hard sessions away from bedtime
Afternoon and early evening is a good slot for a proper session for most people. Finishing a heavy session at half nine and expecting to be asleep by ten and a half is asking a lot of yourself. As a rough rule, try to wrap up anything genuinely hard about three hours before you want to be asleep. If you want to be in bed at half ten, be finished by half seven.
Some people are completely unaffected by a late session and sleep like a log. If that's you, carry on. But if you train late and lie awake afterwards, don't assume that's just how you are — move the session earlier for a fortnight and see.
Wind down properly afterwards
If a late session is unavoidable — and for plenty of people with jobs and kids it is — then give yourself a proper landing. A lukewarm or cool shower, a cool bedroom, low lights, and no scrolling in bed. What you're after is the difference between going straight from a heavy set to lying in the dark, and giving yourself half an hour to come back down first.
The training-and-sleep rules I actually use
- Get outside in the morning. Twenty to thirty minutes, most days. The single best habit on this page.
- Hard sessions earlier where you can. Afternoon or early evening beats late night for most people.
- Aim for a three-hour buffer between finishing something hard and wanting to be asleep.
- Land properly after a late one. Cool shower, cool room, lights down, phone out of reach.
- Judge it over a fortnight, not a night. One bad night tells you nothing. Two weeks tells you plenty.
- Train, full stop. People who train regularly tend to sleep better than people who don't. Timing is a refinement, not a reason to skip.
What About Supplements?
This page used to have a long section on supplements for sleep, with doses and brands. I've taken it out, and I'd rather explain why than quietly drop it.
Telling you which compounds to take, and at what dose, is not my job. I'm a personal trainer, not a pharmacist or a doctor. Some of what was on that list is prescription-only in the UK, some of it interacts with common medications, and none of it is something I should be handing out doses for to a person I've never met and whose medical history I don't know. It was advice I wasn't qualified to give, so it's gone.
What I will say is this. In the studio, I have never once seen a supplement fix a sleep problem that a four o'clock coffee, a nine o'clock dinner, a ten o'clock session and a phone in bed were causing. The habits on this page are free, and they're where the results actually come from. Sort those first and you may well find there's nothing left to solve.
And if after all that you're still considering taking something, ask a pharmacist or your GP — particularly if you take any regular medication. They can tell you what's sensible for you specifically. I can't, and neither can anyone else who hasn't seen your notes.
The Room And The Last Hour
None of this is clever, and all of it works better than people expect.
- Keep the room cool. Most bedrooms are too warm. Cooler than feels obviously comfortable when you get in is usually about right.
- Get it properly dark. Blackout curtains, or an eye mask if that's easier. Cover or move the little glowing lights.
- Keep your times consistent. Going to bed and getting up at roughly the same time, including at weekends, does more than almost any single trick. A big lie-in on Sunday is often why Sunday night is a write-off.
- Get the phone out of the bedroom. Not on the bedside table. Buy an alarm clock. This one gets the most resistance and the most thank-yous.
- Dim the lights in the last hour. Big overhead lights until the second you get into bed is a hard stop from bright to black. Lamps instead.
- Give yourself a wind-down. Half an hour of something dull and analogue — a book, a shower, tidying up. Your last hour shouldn't be work emails or an argument on the internet.
I've written a companion piece on the evening side of this with a few more specifics — five ways to get a better night's sleep covers lighting and screens in more detail.
Training On A Bad Night's Sleep
Here's the bit nobody writes about, and the question I get asked most. You slept badly. You've got a session booked. What do you do?
The honest answer is: usually still go, but change what you do when you get there. Skipping entirely is rarely the right call, because for most people one poor night is not a reason to lose a session, and training tends to help that evening's sleep anyway. But going in and trying to hit a personal best on four hours' sleep is how people get hurt and how they end up hating the gym.
How to train when you've slept badly
- Keep the session, lower the load. Take ten or fifteen per cent off your working weights and get the work done.
- Leave the personal bests for another day. Nothing near your limit, and nothing you'd be nervous about on a good day.
- Stick to what you know. A rough night is not the day to learn a new lift or try a technical variation.
- Take longer rests. You'll need them. Don't rush between sets to keep the session short.
- Shorten it if you need to. Twenty-five focused minutes is a real session. Doing something beats doing nothing by a mile.
- Be careful with the caffeine fix. A big pre-workout to paper over one bad night is how one bad night becomes a bad week.
- If it's been days, not one night, back off properly — and see the note at the top about your GP.
The wider point is that consistency beats intensity every time. Nobody's results were built on one heroic session, and plenty of people's progress has been derailed by an injury picked up on a day they should have taken it steady.
Quick FAQ
Does exercise help you sleep?
People who train regularly generally report sleeping better than people who don't, and it's one of the most common bits of feedback I get from new clients within the first month. The timing matters for some people though — if you train hard late at night and then struggle to settle, try moving the session earlier for a couple of weeks and see whether it makes a difference for you.
How long before bed should I stop training?
As a rough guide, try to finish anything genuinely hard about three hours before you want to be asleep. Plenty of people are unaffected and sleep fine after a late session, so treat it as something to test rather than a rule. Gentle stuff like a walk or easy stretching is fine much closer to bed.
What should I eat in the evening to sleep better?
Less about what and more about how much and when. A moderate dinner finished a couple of hours before bed suits most people better than a large one eaten late. Don't go to bed stuffed, and don't go to bed genuinely hungry either — if you're dieting hard and waking up in the night, the diet is usually too aggressive.
How late can I drink coffee?
Earlier than most people think. Caffeine stays with you far longer than it feels like it does. Early afternoon is a sensible cut-off to try, and some people need to make it lunchtime. Give any change a fortnight before judging it, and remember to count energy drinks, pre-workout and tea as well as coffee.
Does alcohol affect sleep?
It'll get you to sleep and then interrupt the night, which is why so many people describe going out like a light and then waking at three. If you're drinking most evenings and wondering why you wake up feeling rough, try a week off and compare. You don't have to give it up to notice the difference.
Should I take something to help me sleep?
That's a question for a pharmacist or your GP, not for a personal trainer — especially if you take any regular medication. What I'd say is that the free habits on this page are where the results usually come from, so it's worth doing those properly first.
Should I still train if I've slept badly?
Usually yes, but take the ambition down. Drop your weights back a bit, skip anything near your limit, take longer rests and shorten the session if you need to. A steady session beats both a heroic one and a skipped one. If it's been several bad nights in a row rather than one, back off properly and speak to your GP.
Key Takeaways
- Persistent poor sleep is a GP conversation, not a personal trainer one. Everything here is general lifestyle advice for people who want to sleep better, not treatment for anything.
- Make dinner moderate rather than enormous, and finish it a couple of hours before bed.
- A ten-minute walk after your evening meal is one of the best-value habits going.
- Don't go to bed hungry either — if you're dieting hard and sleeping badly, the diet is usually the problem.
- Set a caffeine cut-off in the early afternoon and give it a fortnight before you judge it.
- Alcohol gets you to sleep and then breaks the night up. Try a week off and compare.
- Twenty to thirty minutes outside in the morning is the cheapest, most effective habit on this page.
- Try to finish hard sessions around three hours before bed, and land properly afterwards if you can't.
- Supplements are a pharmacist or GP question. The free habits are where the results come from.
- Cool, dark, quiet room. Consistent bed and wake times. Phone out of the bedroom.
- On a bad night's sleep, still train — just lower the load and leave the personal bests alone.
Disclaimer: This article is general lifestyle information from a personal trainer. It is not medical advice, and it is not intended to diagnose, treat or manage any health condition. If you are sleeping badly over a sustained period, if poor sleep is affecting your daily life, if you are pregnant, or if you take regular medication, please speak to your GP or pharmacist. Never start, stop or change any medication on the strength of something you read on a website.
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