Early to Bed, Early to Rise: How True Is It Really?

"Early to bed and early to rise makes a man healthy, wealthy and wise." Almost every Indian child has heard it. Almost every Indian parent has used it.

In 1998, two epidemiologists at Southampton decided to actually test it. They took 1,229 people aged 65 and over, sorted them into larks (bed before 11 pm, up before 8 am) and owls (bed after 11 pm, up after 8 am), and compared health, income and cognitive performance.

The proverb lost. There was no indication that larks were richer — owls had the higher mean income — and no evidence that larks were superior in cognitive performance or state of health.

So should we abandon the advice? No. But we should understand what it was actually pointing at, because the popular version is wrong in one direction and the "night owls are fine" version is wrong in the other.

First: being an owl is not a character flaw

This needs saying, because owls are constantly told they are lazy or undisciplined.

Chronotype is substantially genetic. In evening types, the internal clock itself is shifted: melatonin and core body temperature rhythms occur, on average, two to three hours later than in morning types. An owl asked to sleep at 10 pm is being asked to sleep at what their brain considers early evening. Willpower does not move a hormone rhythm.

One of the researchers behind the largest study on this put it plainly: because chronotypes are partly genetically determined and not just a character flaw, work hours should have more flexibility, and owls should not be forced into an 8 am shift.

Second: the health data is not flattering to owls, and the reason matters

The largest study analysed 433,268 UK adults. Comparing definite evening types with definite morning types, the evening types had higher rates of every comorbidity examined — the association strongest for psychological disorders (odds ratio 1.94), then diabetes (1.30), neurological disorders (1.25), gastrointestinal problems (1.23) and respiratory disease (1.22). Over an average 6.5 years, evening preference carried roughly a 10% higher risk of death, and that persisted after adjusting for the expected health problems.

Now, before anyone panics: the more recent work suggests much of this excess risk is not caused by the chronotype itself. Evening chronotype was associated with modestly higher cardiovascular risk that was mainly explained by overall poorer cardiovascular health — smoking, weight, diet, inactivity, poorer sleep.

And there is a second explanation that matters more for the person sleeping at 2 am: the collision between a delayed internal clock and a society organised around early mornings produces circadian misalignment. The damage is done not by the late hour, but by the fight between the body clock and the alarm clock.

So: is the 2 am to 10 am person healthy?

Ask three questions. The answers matter far more than the clock time.

1. Is it the same every day, including weekends? This turns out to be the single most important factor, and it is the finding that has changed sleep medicine in the last few years. In 60,000 UK Biobank participants with wearable data, higher sleep regularity was associated with 20–48% lower all-cause mortality, 16–39% lower cancer mortality and 22–57% lower cardiometabolic mortality — and sleep regularity predicted mortality more strongly than sleep duration did.

Read that carefully. Consistency beat duration. A person reliably sleeping 2 am to 10 am every single day is in a far better position than someone who sleeps 11 pm to 6 am on weekdays and 3 am to noon on weekends. The second pattern is the common one, and it is the harmful one.

2. Is it chosen, or forced? An owl who sleeps 2 to 10 and works from 11 am is aligned with their own clock and may be entirely healthy. An owl who sleeps at 2 am because of the phone and still has to leave at 7:30 am is running a chronic sleep debt and living in misalignment. Same bedtime; completely different physiology.

3. What happens in those eight hours — and around them? Late sleepers eat late, move less, get less morning daylight, and get more night-time screen light. Each of these independently damages metabolism. Very often it is these habits, not the hour of sleep, doing the harm.

So the honest answer: 2 am to 10 am, done consistently, in someone whose work fits it, with daylight exposure and reasonable meal timing, can be perfectly healthy. The same hours done irregularly, against the grain of an early job, with midnight dinners and no sunlight, is not.

The specific problem: night shifts for foreign clients

A large part of India's workforce — IT, BPO, medical transcription, global support desks — works US hours from Indian soil. This deserves a straight answer rather than reassurance.

In 2019 the International Agency for Research on Cancer re-evaluated night shift work and retained its classification as probably carcinogenic to humans (Group 2A), based on sufficient evidence in experimental animals and strong mechanistic evidence, with limited evidence in humans. The working group defined night shift work as work during the regular sleeping hours of the general population.

Alongside the cancer question, night shift work is associated with higher rates of cardiovascular disease, obesity, type 2 diabetes, gastrointestinal disorders, depression and accidents.

This is not a reason to leave your job — most people cannot, and the risk is a population-level increase, not a personal certainty. But it is a reason to take the schedule seriously instead of treating it as a lifestyle quirk. If you work nights:

• Keep the same schedule on days off. This is the hardest advice and the most valuable. Flipping back to a "normal" pattern every weekend means your body never adapts to anything; you are permanently jet-lagged. If a full flip is unavoidable for family reasons, shift by an hour or two, not eight.
• Get bright light during your shift, and block it on the way home. A bright workspace at night helps you adapt; sunglasses on the commute home prevent the morning light from resetting your clock in the wrong direction.
• Make your bedroom truly dark and quiet. Blackout curtains, phone off, family briefed. Daytime sleep is lighter and more fragile than night sleep, and it needs protection.
• Eat on a day schedule, not a night one. Metabolism handles food poorly at night. Keep the main meals in the daylight hours where you can, and avoid a heavy meal in the middle of the shift.
• Do not fix fatigue with caffeine and sugar late in the shift. Both wreck the sleep that follows, and the cycle tightens.
• Get an annual check — blood pressure, blood sugar, lipids, weight, and vitamin D, which is often low in people who never see daylight.

Why this matters for headache patients in particular

A large proportion of the patients I see come for migraine and other headaches, and sleep is one of the most consistent and most overlooked triggers. Irregular sleep timing, insufficient sleep, and oversleeping on days off are all common precipitants. Many patients whose headaches worsened after a shift change or a new job never make the connection themselves.

If your headaches are getting worse, look at your sleep clock before adding another tablet. Stabilising sleep timing is one of the few interventions that reliably reduces headache frequency, costs nothing, and has no side effects.

What the tradition actually understood

Our own tradition is emphatic about this. Brahma muhurta — roughly the ninety minutes before sunrise — is prescribed for waking, study and meditation. The dinacharya of Ayurveda organises the entire day around the sun: rise before it, eat the main meal when it is highest, sleep not long after it sets.

Now here is what I find striking. Strip away the vocabulary and this is a chronobiology protocol. Anchor every daily activity to the light-dark cycle, keep it identical each day, and take the largest meal at the metabolic peak. Modern research arrived at the same three instructions — regularity, light alignment, early eating — with instruments the rishis did not have.

The tradition understood something else too. Those pre-dawn hours are quiet, cool, and free of demand. Nobody is calling. Nothing is due. This is one of the few periods in a modern day when the mind is not being pulled at, and that alone explains much of what practitioners report. Whether Brahma muhurta has a specific advantage beyond regularity and quiet has never been properly tested, and I would not claim more than the evidence allows.

But note what the tradition did not say. It did not tell you to sleep less. Early rising in that framework comes with early sleeping — the whole day is shifted, not shortened. What we do now is take the "early to rise" half and combine it with a 1 am bedtime. That is not the tradition. It is simply sleep deprivation with a spiritual justification.

So what should you actually do?

• Fix the wake time first. A consistent wake time anchors the whole clock more reliably than a consistent bedtime, and it is easier to control.
• Get daylight within an hour of waking — ten to fifteen minutes outdoors. This is the single strongest signal your clock receives, and most of us live entirely indoors.
• Keep the schedule on weekends. Within an hour of your weekday timing. This one change addresses the pattern the mortality data implicates most.
• If you are a genuine owl with a flexible job, stop fighting it. Move consistently to your natural window rather than failing at 6 am every day and recovering on Sundays.
• If you are an owl with an early job, shift gradually — fifteen minutes earlier per week, morning light on waking, dim light and no screens for an hour before bed. Sudden changes fail.
• Stop finishing dinner near bedtime. Aim for two to three hours before sleep.

The proverb, then, is half right — and right for a reason Franklin did not know. It is not the clock on the wall that makes you healthy. It is having a clock at all, and keeping to it.

This article is for general education and does not replace medical advice. Persistent unrefreshing sleep, loud snoring with daytime sleepiness, or sleep that has changed suddenly should be assessed — sleep apnoea and other treatable disorders are commonly missed.