How Much Sleep Do Men Really Need? Why I Treat Seven Hours as Part of the Job

In this guide

• The number: what the sleep experts actually recommend
• Sleep and testosterone: the JAMA study every man should know
• Sleep and training: why your gains happen in bed
• Sleep, mood and sex drive
• Caffeine: the hidden sleep thief
• Alcohol: the nightcap myth
• My sleep rules, based on what the evidence supports
• When it is more than bad habits
• My take

There is a type of man who brags about sleeping five hours. He works late, trains early, drinks three coffees before lunch and thinks rest is for the weak. I understand the energy behind it. But when I read the research on sleep, I stopped admiring that man.

My work depends on energy, focus and physical performance on a schedule I do not always control. Sleep is the cheapest performance tool I have. It costs nothing, it needs no supplement and it works on almost every system in the body.

I am not a doctor, and this is not medical advice. If you have ongoing sleep problems, talk to a GP. The facts here come from the NHS, the American Academy of Sleep Medicine and peer-reviewed studies on PubMed. The opinions are mine.

The number: what the sleep experts actually recommend

In 2015, the American Academy of Sleep Medicine and the Sleep Research Society brought together a panel of experts who reviewed thousands of studies on sleep duration and health. Their consensus was simple: adults should sleep 7 or more hours per night on a regular basis to promote optimal health (Watson et al., PubMed).

They also said that sleeping less than seven hours regularly is associated with weight gain and obesity, diabetes, high blood pressure, heart disease, depression, impaired immune function, more pain, worse performance, more errors and a greater risk of accidents. That is a long list for something most men treat as optional.

Two details are worth noticing. First, “7 or more” is a minimum, not a target. Young adults, people recovering from illness and people who train hard may need more. Second, the key words are “on a regular basis”. A great Sunday lie-in does not cancel out five short nights.

Seven hours is not laziness. It is maintenance.

Sleep and testosterone: the JAMA study every man should know

If one study convinces men to take sleep seriously, it is this one, because it hits where they care.

In 2011, researchers at the University of Chicago published a study in JAMA. They took 10 healthy young men, average age 24, and after a period of normal sleep restricted them to about five hours in bed per night for one week. Their daytime testosterone levels dropped by 10 to 15 percent. The men also reported lower mood and vigour as the week went on (Leproult & Van Cauter, PubMed).

It was a small study and it lasted one week, so we should not overstate it. But the direction is clear, and the researchers pointed out that the drop was similar to what you would expect from 10 to 15 years of ageing. One week of bad sleep, and your hormones act older.

Testosterone is not the only thing that drives libido, energy and muscle, and I explained the bigger picture in testosterone and sex drive. But if you are worried about your levels, fix your sleep before you start looking for boosters or injections.

Sleep and training: why your gains happen in bed

Training breaks the body down. Recovery builds it back stronger. And a big part of recovery happens while you sleep.

A 2015 review in Sports Medicine by Fullagar and colleagues looked at how sleep loss affects exercise. Sleep deprivation was linked with worse performance in some endurance and submaximal efforts, worse mood and higher perceived effort, meaning training simply feels harder when you are tired. The effects on maximal strength were less consistent, which matches what many people notice: you can still lift one heavy weight, but your sessions are worse overall (Fullagar et al., PubMed).

Researchers have also proposed that sleep debt shifts the hormonal balance towards breakdown, with higher cortisol and lower testosterone and growth hormone activity, which could make it harder to recover and build muscle (Dattilo et al., PubMed). That paper is a hypothesis, not proof, but it fits with the testosterone data.

In practical terms: if you train hard and sleep badly, you are paying for the gym and leaving the results on the table. My guide on rest days and overtraining goes deeper into recovery.

Sleep, mood and sex drive

Think about the last time you slept four hours. You were irritable, hungry for junk food and not in the mood for anything except going back to bed. Now imagine living like that every week.

Short sleep affects mood and stress, and stress is one of the most common enemies of sexual desire and performance. Plenty of men who worry about their libido are, honestly, just exhausted. Before you assume something is wrong with you, look at your sleep, your stress and your alcohol. I wrote more about this in low libido in men and sexual performance anxiety.

Caffeine: the hidden sleep thief

I like coffee. Most men who train like coffee. The problem is when we drink it.

A 2013 study in the Journal of Clinical Sleep Medicine gave people 400 mg of caffeine, about the amount in four cups of brewed coffee, at bedtime, three hours before bed or six hours before bed. Even when taken six hours before bedtime, caffeine reduced total sleep by more than one hour. The people often did not notice how much their sleep had been disturbed (Drake et al., PubMed).

The Mayo Clinic says up to 400 mg of caffeine a day appears safe for most healthy adults, but that caffeine can interfere with sleep and that people vary a lot in sensitivity (Mayo Clinic: caffeine). Pre-workout powders often contain a lot of caffeine, so an evening session with a big scoop can wreck your night without you connecting the two.

My rule is simple: no caffeine after early afternoon. If I train in the evening, I train without stimulants.

Alcohol: the nightcap myth

Alcohol makes many people fall asleep faster, which is why so many men use it as a sleeping aid. But the NHS warns that drinking affects sleep quality, and that regular drinking can leave you feeling tired even after a full night in bed (NHS: the risks of drinking too much).

You might be unconscious for eight hours and still wake up unrested. Alcohol also has its own direct effects on erections, which I covered in alcohol and sexual performance.

My sleep rules, based on what the evidence supports

These are not secrets. Most of them are on the NHS sleep page (NHS: how to get to sleep) and in the Mayo Clinic’s sleep tips (Mayo Clinic: sleep tips). The difference is doing them every day.

1. Same wake-up time, every day. Including weekends. A regular schedule is one of the most consistent recommendations in sleep medicine.
2. Aim for seven to nine hours in bed. If you need to be up at 7, you are in bed by 11 at the latest, not scrolling until 1.
3. Cut caffeine early. As above, early afternoon at the latest.
4. Keep the room dark, cool and quiet. Blackout curtains, an eye mask or earplugs are cheap upgrades.
5. Screens down before bed. The NHS suggests avoiding screens before sleep. If I must use my phone, it is not for work emails or arguments.
6. Train, but not too late. Regular exercise helps sleep, but a hard session right before bed can leave some people wired.
7. Do not lie there fighting it. If you cannot sleep, the NHS advice is to get up and do something relaxing until you feel sleepy, rather than lying in bed stressed.
8. Use daylight. Get outside in the morning when you can. Light helps set your body clock.

If you travel a lot, the wake-up rule and morning light become even more important. They are the two anchors that help the body clock catch up.

When it is more than bad habits

Sometimes the problem is not discipline. Insomnia, sleep apnoea, anxiety and depression all affect sleep and need proper care. The NHS says to see a GP if changing your sleeping habits has not worked, if you have had trouble sleeping for months, or if it is affecting your daily life (NHS: insomnia).

Loud snoring, gasping or stopping breathing during sleep, and feeling exhausted despite long nights can be signs of obstructive sleep apnoea, which is linked to heart problems and, in some men, to erectile dysfunction. That is a reason to see a doctor, not to buy a better pillow.

My take

If you take one idea from this column, take this: sleep is training. It is the session where your body actually adapts, your hormones reset and your mind calms down. Skip it and every other effort, the gym, the diet, the supplements, works less well.

I do not always get it right. Long days and travel happen. But I treat seven hours as the minimum and I protect it with boring habits: same alarm, early coffee, dark room, phone away. It is not exciting. It works.

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Sources

1. Watson NF et al. Recommended Amount of Sleep for a Healthy Adult: A Joint Consensus Statement of the American Academy of Sleep Medicine and Sleep Research Society. Sleep, 2015.
2. Leproult R, Van Cauter E. Effect of 1 week of sleep restriction on testosterone levels in young healthy men. JAMA, 2011.
3. Fullagar HH et al. Sleep and athletic performance: the effects of sleep loss on exercise performance, and physiological and cognitive responses to exercise. Sports Medicine, 2015.
4. Dattilo M et al. Sleep and muscle recovery: endocrinological and molecular basis for a new and promising hypothesis. Medical Hypotheses, 2011.
5. Drake C et al. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine, 2013.
6. NHS. How to get to sleep.
7. NHS. Insomnia.
8. NHS. The risks of drinking too much.
9. Mayo Clinic. Caffeine: how much is too much?
10. Mayo Clinic. Sleep tips: 6 steps to better sleep.