Alcohol and recovery after 40

I poured a third glass at a friend's place in Brunswick, the kind of casual top-up you barely register at 30. Woke at 4:14am. Heart going. Mouth dry. The next day was a write-off, not in the cinematic sense, just a flat tax on everything I tried to do. The training session at 6am went ahead. It was rubbish. My watch showed a resting heart rate ten beats above baseline for two days.

That is the part nobody warned me about. Not the headache. The recovery debt.

What actually changed in your forties

Your liver did not break. It got slower. Two enzymes do most of the work on alcohol, ADH and ALDH, and their efficiency drifts down from your mid-thirties onward. The same volume that processed cleanly at 28 now sits in your bloodstream longer. You feel it as a longer fuzz the next morning. Blood tests would show it as elevated GGT if you went looking.

Lean muscle mass also drops about 1% a year past 35 unless you actively defend it. Alcohol distributes through body water, and muscle holds more water than fat. Less muscle means a higher blood alcohol concentration from the same drink. Two beers in your forties is not two beers in your twenties, even if your weight is identical.

Then there is the stomach lining, which thins. Absorption gets faster. The "gentle warmth" arrives quicker and the floor underneath it arrives quicker too.

• Liver enzyme efficiency: down roughly 20-30% from peak.
• Body water percentage: lower, so concentration runs higher.
• Stomach lining thickness: reduced, faster absorption.
• Sleep architecture sensitivity: elevated, more disruption per drink.
• Cortisol response the next morning: amplified.

None of this is dramatic on its own. Stack them and the equation shifts.

What three or four standard drinks actually does

Australia's drinking norms run hot. The OECD average sits around 8.6 litres of pure alcohol per adult per year. We sit closer to 9.4. The "knock-off beer, then a couple of wines with dinner" pattern is common enough that nobody flags it. At 28 your body absorbed that pattern as background noise. At 45 it does not.

Three to four standard drinks on a Friday night, finished by 10pm, looks like this on the inside. Your blood alcohol peaks around 11pm. Your liver clears roughly one standard drink per hour, so you are still processing at 2am. REM sleep, the dreaming, memory-consolidating part, gets suppressed for the first half of the night. Deep sleep gets fragmented. You wake at 4am because alcohol metabolism produces a cortisol spike, the body's wake-up hormone, at exactly the wrong time.

You did not "sleep well after a few wines". You passed out, then your nervous system spent the second half of the night working overtime.

The next day your resting heart rate sits 8-15 beats above baseline. Your HRV (heart rate variability, a recovery marker) drops by 30-50%. Glycogen, the fuel your muscles use for hard work, did not replenish properly because the liver was busy. Testosterone production overnight, which does most of its work between 1am and 5am, was suppressed. Cortisol is elevated. Inflammation markers are elevated. You will feel mildly anxious for no clear reason. That is not in your head, it is in your blood.

Training that day will be worse. Not "I do not feel like it" worse. Measurably worse. Power output drops 6-11%. Cognitive performance on complex tasks drops similarly. You will make worse decisions at work and not realise you are making them.

This is the part the beer ad never showed you.

The body composition arithmetic

Alcohol is 7 calories per gram, almost as dense as fat. Four standard drinks is roughly 500 calories the body cannot store, so it burns them first and parks everything else (the Thai takeaway, the late toast) as fat. Visceral fat, specifically. The belly kind. The kind that sits around your organs and pushes inflammatory signals into your bloodstream.

Drink consistently and the equation looks like this. The alcohol calories go to combustion. The food calories go to storage. Your body recognises a recurring pattern and optimises for it. You gain weight slowly, around the middle, and the gym sessions that used to hold the line stop holding it.

This is mechanical, not moral. You do not have less willpower than your 28-year-old self. Your liver has different priorities.

Moderation that actually works

I am not going to tell you to stop drinking. I will tell you what has worked, both for me and for the men I have learnt from in this space.

• Two-drink ceiling on any given night. Not "usually two". Two.
• Three alcohol-free nights per week, non-negotiable, locked in like a meeting.
• Nothing within three hours of bed. Sleep is where recovery lives, defend it.
• Water glass beside every alcoholic drink, finished before the next one.
• Track it. The Australian Recommended Limits app or a simple notes file. Memory lies, the page does not.
• One full month off per year. February or July work well. You will sleep like a teenager by week three.

The man who drinks four nights a week for thirty years is not the same man who drinks one night a week for thirty years, even if the weekly total looks similar on paper. Frequency matters more than volume. The liver wants gaps.

The sleep piece is the whole game

If I had to pick one reason to take alcohol seriously past 40, it would be sleep. Not the liver, not the waistline. Sleep.

You need 7-9 hours of structurally intact sleep to recover from training, regulate appetite, consolidate memory, manage mood, and produce testosterone. Alcohol shreds the architecture of sleep even when the duration looks fine. Your watch will say you got 7 hours. Your body will know it got the equivalent of 4.

Stack that pattern across years and the downstream effects compound. Worse mood regulation. Slower recovery from injury. Higher visceral fat. Lower drive in every sense of the word. None of it shouts. All of it shows up.

KNOW THE TRUE COST OF EACH DRINK. Not the cost on the night. The cost across the next 48 hours.

The honest reframe

I still drink. A glass of red on a Friday with my wife. A beer after a long ride. The change is that I no longer pretend the cost is zero. I price it in. I plan around it. The training session the morning after a drinking night is a recovery walk, not a hard set. The big work meeting on Tuesday means Monday night is dry. The Saturday wedding means Friday night is dry and Sunday is a write-off, planned for.

This is not deprivation. It is bookkeeping. The man who knows what each drink costs gets to choose what to spend. The man who does not know is paying a tax he did not budget for.

You learnt to drink in your twenties when the body absorbed everything. You did not learn to drink in your forties because nobody teaches that part. The lesson is short. Less, less often, never close to bed, and pay attention to what your watch tells you on Sunday morning.

Drink less. Sleep deeper. Wake clearer.