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Motivation and habits Published on July 23, 2026 15 min read

How can you improve your sleep?

Observe your routine, change one habit at a time, and assess its effect on your nights and workouts without chasing a perfect sleep score.

Nalko Team

One bad night can make you want to optimize everything the next day: buy a supplement, move bedtime much earlier, or monitor every minute of deep sleep. That pile of changes can add pressure without revealing the real cause. A more useful method is to protect the fundamentals, track what happens simply, and test the smallest change that fits your life.

Improving sleep is not about maximizing a score

Restorative sleep cannot be reduced to exactly eight hours or a perfect percentage of deep sleep. Duration, continuity, timing, and how you function during the day all matter. Needs also vary with age, health, accumulated sleep loss, and life constraints.

The joint consensus from the American Academy of Sleep Medicine and the Sleep Research Society recommends that healthy adults regularly sleep at least seven hours per night. Seven to nine hours is a common guideline, not an identical prescription for everyone. Some people need more, particularly after a period of sleep restriction or during illness. AASM and Sleep Research Society, 2015

Cycles and stages explain what happens during the night, but they do not provide a separate dial to optimize. If you want to understand their sequence before taking action, read the guide to sleep stages.

Understanding the stages helps you interpret a night without treating every awakening or variation as a problem. What are the stages of sleep?

Duration: did I actually allow enough time to sleep?
Regularity: do my sleep and wake times shift substantially between days?
Continuity: are awakenings frequent or prolonged?
Daytime function: am I alert, focused, and able to train normally?

Observe for seven days before changing everything

Start with one representative week. In a paper diary, a note on your phone, or another external document, record when you go to bed, roughly when you fall asleep, any awakenings you remember, when you get up, and any naps. Add your daytime sleepiness, the time of your last caffeine or alcoholic drink, and your workout time.

The National Heart, Lung, and Blood Institute recommends keeping a sleep diary for one to two weeks to understand sleep times, naps, sleepiness, caffeine, alcohol, and exercise. This observation does not diagnose anything; it simply makes habits and symptoms easier to describe. NHLBI — insomnia diagnosis and sleep diary

Do not try to estimate every minute precisely. Approximate times recorded consistently are more useful than false accuracy. If tracking increases your anxiety, simplify it to three items: bedtime, wake time, and how you feel on waking.

Bedtime and wake time.
Estimated time to fall asleep and remembered awakenings.
Naps and daytime sleepiness.
Last caffeine, any alcohol, and workout time.
Unusual event: illness, travel, major stress, pain, or a night shift.

Allow enough time for sleep before looking for a trick

No routine can produce eight hours of sleep in a six-hour window. Start with the time you must get up and work backward to create a realistic opportunity for sleep. If you currently sleep too little, move the start of your wind-down routine earlier in small steps instead of suddenly demanding two extra hours of sleep.

A longer window does not guarantee that you will fall asleep immediately. It does remove one obvious obstacle: not having enough time available. Allow a few days to observe the adjustment, and do not draw conclusions from one night.

Do not stay in bed much longer solely to force sleep. When falling asleep becomes a repeated struggle, specific strategies such as cognitive behavioral therapy for insomnia need to be tailored to the problem and ideally guided by a qualified professional.

Set the time you need to get up first.
Allow time for your wind-down routine and for falling asleep.
Move the routine earlier in small steps if your current schedule is very late.
Judge the weekly average, not the success of one evening.

Keep your wake time consistent and use light at the right time

A National Sleep Foundation consensus concludes that regular sleep and wake times matter for health, safety, and performance. This does not mean that occasionally sleeping in is forbidden: after a week of insufficient sleep, recovery sleep on days off may be beneficial. Sletten et al., 2023 — consensus on sleep regularity

Choose a wake time that works for most of your days and gradually bring highly shifted days closer to it. Consistency does not need to be exact to the minute; the main goal is to avoid constantly alternating between early wake-ups and shifts of several hours.

Light reaching the eyes helps synchronize the central body clock. The NHLBI notes that natural light signals daytime, whereas bright artificial light late in the evening can delay sleep-related signals. Start by going outside or sitting near daylight early in the day, then gradually dim the lights before bed. NHLBI — the sleep-wake cycle and light

A phone is not a universal insomnia switch. Light, stimulating content, and time taken away from sleep can all play a role. If you use your phone, lower the brightness and set an end time for activities that keep you awake.

Test a caffeine cutoff that suits your sensitivity

Caffeine can mask sleepiness without eliminating the need for sleep. Coffee, tea, energy drinks, cola, chocolate, and pre-workout products can all contribute to the total dose. A pre-workout taken before a late session is therefore worth checking before concluding that evening exercise prevents sleep.

A meta-analysis of 24 studies associated caffeine with about 45 fewer minutes of total sleep on average, longer sleep latency, and lower sleep efficiency. The authors estimated that coffee containing about 107 mg of caffeine would need to be consumed nearly nine hours before bedtime to avoid an average reduction in sleep duration. Dose, habitual use, and individual sensitivity mean that this estimate is not universal. Gardiner et al., 2023 — caffeine and sleep

For an initial test, move your last caffeine intake to eight to ten hours before bedtime for seven days. If nothing changes, examine another variable. If the effect is clear but you want to keep using caffeine, find the lowest dose and latest time that remain compatible with your sleep.

Count caffeine from coffee, tea, soda, energy drinks, and pre-workout products.
Change the timing before eliminating every product.
Keep the same rule for one week so you can assess it.
Avoid compensating for every short night with more caffeine late in the day.

Do not confuse alcohol-induced drowsiness with restorative sleep

Alcohol can make falling asleep seem easier, especially at higher doses. That sensation does not prove that the night will be more restorative, and alcohol should not become a sleep aid.

A meta-analysis of 27 studies in healthy adults found delayed and reduced REM sleep, with detectable disruption even at the low doses studied and greater disruption as the dose increased. Effects on total sleep time, sleep efficiency, and awakenings were less certain. Gardiner et al., 2025 — alcohol and sleep architecture

If you drink, do not use alcohol as a strategy for falling asleep. Simply record it in your diary and compare similar nights, without turning a pattern you observe in yourself into a medical certainty.

Stay active and adjust only late workouts that cause problems

Regular physical activity is part of a healthy lifestyle, and you do not need to ban evening strength training automatically. A time that lets you train consistently may be better than a theoretically perfect time that you cannot maintain.

A systematic review and meta-analysis did not conclude that evening exercise generally worsened sleep in healthy adults. It did find that some measures could be less favorable after vigorous exercise ending within one hour of bedtime. The studies were heterogeneous and do not support imposing the same cutoff time on everyone. Stutz et al., 2019 — evening exercise and sleep

If you sleep well after a late workout, there is nothing to correct. If problems recur, first remove late caffeine, then test an earlier workout finish or lower intensity for one week. Change one variable so you can learn what actually matters.

Create an environment and routine that are easy to repeat

The NHLBI recommends a quiet, dark, cool bedroom, a calm period before bed, and avoiding heavy meals, alcohol, nicotine, and late caffeine. It does not prescribe one ideal temperature for every home and every person. NHLBI — healthy sleep habits

Start with obvious irritants: outdoor light, notifications, recurring noise, uncomfortable bedding, or a room that feels too warm. A sleep mask, earplugs, or silent mode may help when they are safe and comfortable, but none is mandatory.

Then build a short sequence you like enough to repeat: prepare for the next day, dim the lights, read, take a shower, or use a simple relaxation exercise. The goal is not to perform a perfect ritual, but to reduce decisions and stimulation gradually.

An approximate time to start your routine.
Dimmer light and notifications turned off.
A bedroom that is as quiet, dark, and cool as reasonably possible.
A calming activity chosen because it works for you.
An evening meal you digest comfortably rather than a universal food rule.

Use naps without shifting the entire night

A nap can temporarily restore alertness after a short night. It can also reduce sleep pressure in the evening when it is long or late in someone who already struggles to fall asleep.

Do not automatically remove a nap that helps you. If falling asleep at night is difficult, test a shorter nap earlier in the afternoon instead. For adults with this problem, the NHLBI suggests limiting naps to about twenty minutes. This is a practical guideline, not an exact biological boundary.

After a bad night, return to your usual schedule as much as possible and protect the following night. Occasional recovery sleep remains compatible with a regular routine; repeated large shifts make the pattern hardest to interpret.

Test one change over 14 days

Use your diary to choose the most plausible variable: too little time available, a highly irregular wake time, late caffeine, bright light, alcohol, an intense workout just before bed, or an uncomfortable environment. Keep the other habits as stable as your life allows.

Observe for seven days, then confirm or adjust during the second week. Compare how easily you fall asleep, awakenings, how you feel on waking, sleepiness, and daytime function. A difference of a few estimated minutes matters less than a repeated, noticeable change.

If nothing changes, it does not mean you lack discipline. Reject that hypothesis, test another variable, or seek help if the problem is frequent and disruptive.

Days 1 to 7: track without seeking perfection.
Day 8: choose one priority variable.
Days 8 to 14: apply the same test whenever possible.
Day 15: keep, adjust, or abandon the change based on the trend.

Compare your external sleep diary with your workouts in Nalko

Nalko does not measure your sleep. Do not look there for nightly duration, sleep stages, or a recovery score. Keep your sleep diary in an external tool, then use the Nalko workout log to record what the app actually tracks: exercises, sets, reps, loads, and RIR.

After two weeks, compare the trends cautiously. Worse workout performance after several short nights may justify protecting your sleep schedule more carefully, but a few days do not prove causation. Nutrition, stress, pain, programming, and illness can also play a role.

If a watch reports little deep sleep, do not overhaul your routine based on that number alone. The dedicated guide explains what the estimate may mean and why a consumer device cannot replace a clinical evaluation. How much deep sleep do you need per night?

Know when healthy habits are no longer enough

The NHLBI defines insomnia as chronic when difficulty falling asleep or staying asleep occurs at least three nights per week for three months or longer. It recommends talking with a doctor when insufficient sleep affects daily activities, without necessarily waiting for that threshold. NHLBI — insomnia criteria and evaluation

For chronic insomnia, the AASM strongly recommends multicomponent cognitive behavioral therapy for insomnia, or CBT-I. It states that sleep hygiene alone is not an adequate treatment. Adding more and more household rules can therefore delay appropriate care. AASM, 2021 — behavioral treatments for chronic insomnia

Observed breathing pauses, waking while choking or gasping, loud frequent snoring, marked sleepiness, or morning headaches may accompany sleep apnea. These signs warrant a discussion with a healthcare professional rather than another routine or supplement. NHLBI — sleep apnea symptoms

Key takeaway: protect the basics before optimizing details

The best sleep protocol is not the one that adds the most rules. It is the one that gives you enough time to sleep, makes your schedule more consistent, and gradually removes obstacles supported by your own observations.

Allow a sleep window compatible with at least seven hours for most adults.
Prioritize a consistent wake time and seek natural light early in the day.
Test caffeine, alcohol, light, and workout timing separately.
Keep the bedroom quiet, dark, comfortable, and cool enough for you.
Use an external diary for 14 days and change one variable at a time.
Seek care when the problem persists, impairs your day, or suggests sleep apnea.

Frequently asked questions about improving sleep

How many hours should you sleep to feel restored?

For a healthy adult, regularly getting at least seven hours is the consensus guideline, and seven to nine hours often works well. It is not an identical target for everyone. Consider how you feel on waking, your sleepiness, and your daytime function rather than one isolated number.

How can you sleep through the night?

Brief awakenings can be normal and are not always remembered. To limit disruptive awakenings, protect a sufficient sleep window, keep a reasonably regular schedule, and make the bedroom quiet, dark, and comfortable. Also observe alcohol, caffeine, late meals, pain, and stress. Frequent or prolonged awakenings that impair daytime function warrant medical advice.

What time should you stop consuming caffeine?

There is no universal cutoff time. A meta-analysis suggests that standard coffee can still reduce sleep duration when consumed less than nine hours before bedtime on average. Test a cutoff eight to ten hours before your usual bedtime, then adjust it according to your dose, sensitivity, and observed result.

Do you need to eliminate screens before bed?

Not necessarily as an absolute rule. Bright light, stimulating content, and time taken away from sleep can all delay sleep onset. Start by lowering brightness, turning off notifications, and setting an end time for activities that keep you awake, then assess the actual effect.

Does exercising in the evening prevent sleep?

Not for everyone. Available evidence does not show a general worsening of sleep after evening exercise, but a very intense workout ending within one hour of bedtime may disrupt sleep for some people. If you sleep well, keep your schedule. If not, test caffeine timing first and then an earlier workout finish.

Does 4-7-8 breathing improve sleep?

Slow breathing can be a relaxing ritual if it suits you, but the evidence does not support presenting the 4-7-8 method specifically as an insomnia treatment. Stop if it causes dizziness or discomfort. For chronic insomnia, CBT-I has much stronger guideline support.

Why are you tired even after eight hours in bed?

Eight hours in bed guarantees neither eight hours of sleep nor the absence of a sleep disorder. Awakenings, irregular timing, medication, pain, illness, sleep apnea, mood, and other factors can contribute. Persistent fatigue, dangerous sleepiness, snoring with breathing pauses, or waking while choking or gasping warrant medical evaluation.