How to Lose Weight After 40: A Guide for Men

Losing weight after 40 is not hard because your metabolism collapsed. It is hard because you carry less muscle, get less sleep, sit more and drink more than you did at 25. All four of those are fixable. Lift weights at least twice a week, eat enough protein, cut the liquid calories, walk more, and aim for 0.5 to 1kg a week. That is the entire answer. The rest of this is how we actually get men to do it, and the traps I have watched them fall into since 2011.

First, you are not the exception

Every week a bloke sits across from me at the studio and says some version of "I don't know what happened, it just crept on." He thinks he is unusual. He is the majority. The Australian Institute of Health and Welfare reports that 72 percent of males aged 18 and over are living with overweight or obesity, compared with 62 percent of females. Break it down by age and it gets starker: in the ABS National Health Survey, 74.8 percent of men aged 35 to 44 and 77.9 percent of men aged 45 to 54 were overweight or obese.

The waist numbers matter more than the scale ones. In the same ABS data, 70.2 percent of men aged 45 to 54 had a waist measurement that put them at increased risk of chronic disease. The Better Health Channel puts a healthy waist for men at under 94cm and tells you plainly not to rely on the numbers on the scales. If you own one measuring tape and one set of scales, the tape is the more useful tool.

None of that is meant to scare you. It is meant to take the shame out of it. You are not weak, you are average, and average is a bad place to be at 45.

Why it feels harder than it did at 25

There are four real reasons, and a metabolism that mysteriously died is not one of them.

• You have less muscle than you did. Muscle is where most of your glucose goes and it is the main thing holding your resting energy use up. Unless you have been training against it, you have been quietly losing it for twenty years. This is the single biggest difference between a 45 year old body and a 25 year old one, and it is the one you can reverse fastest.
• You move less without noticing. At 25 you played sport, walked to the pub, and had nowhere to be. At 45 you drive, sit at a desk, drive again, and do a school pickup. Nothing about that feels lazy. It is just a few hundred fewer calories a day than you used to burn, every day, for a decade.
• The drinking has quietly scaled up. Two beers on a Friday became four beers plus a bottle of red across the weekend. That is not a moral problem, it is an arithmetic one, and I go through the actual numbers in what drinking really costs you.
• You sleep worse. Young kids, work stress, phone in bed, a late glass of wine. Short sleep makes you hungrier, lazier in the gym and worse at saying no to the biscuit tin at 3pm.

Notice that three of the four are lifestyle drift, not biology. That is good news. Drift can be reversed.

What actually works, in order of impact

1. Lift weights at least twice a week

If you only change one thing, change this. The Australian physical activity guidelines for adults aged 18 to 64 say to include muscle-strengthening activities on at least 2 days each week, on top of 2.5 to 5 hours of moderate activity or 1.25 to 2.5 hours of vigorous activity. Most men over 40 I meet are doing some version of the cardio half and none of the strength half.

Resistance training is what tells your body to hold onto muscle while you are eating less. Skip it and you will lose weight, but a chunk of what you lose is the tissue you most need to keep. The Better Health Channel says it directly: when you lose weight too quickly, you lose fat and muscle. Two full-body sessions a week is the floor, three is better, and the lifts that matter are the boring ones: squat, hinge, push, pull, carry. More detail on how to set that up in our guide to strength training after 40.

2. Eat enough protein, which is more than you think

Protein is the lever most men under-use. It keeps you fuller on fewer calories and it gives your body the raw material to keep muscle while you drop fat. The best available evidence on how much you need comes from a 2018 systematic review and meta-analysis in the British Journal of Sports Medicine (Morton and colleagues, 49 studies, 1,863 participants), which found that intakes beyond about 1.62g of protein per kg of bodyweight per day produced no further training-related gains in lean mass. That plateau had a wide confidence interval, so treat it as a sensible ceiling rather than a precise law.

In practice, for a man who is training and trying to lose fat, we aim for roughly 1.6 to 2.0g per kg of bodyweight. For a 95kg bloke that is about 150 to 190g a day. The way to hit it is not a shaker full of powder, it is 30 to 40g of protein at each meal: eggs or Greek yoghurt at breakfast instead of toast and a banana, a decent serve of meat or fish at lunch and dinner. Most men I work out protein targets with are starting from about 80g a day and are amazed how much less hungry they feel at 160g.

3. Deal with the drinking properly

I am not going to tell you to quit. I will tell you that a Friday and Saturday of solid drinking can erase the deficit you built across five days, twice over, and that it wrecks the sleep that makes the next week's training work. The men who get the fastest results are almost always the ones who move from drinking five nights a week to drinking two, rather than the ones who go dry for a month and then come back harder.

4. Walk more than feels necessary

Training sessions are three or four hours of your week. The other 165 hours matter more than people want to hear. Getting from 4,000 steps a day to 9,000 is a bigger change in weekly energy output than adding a fourth gym session, and it does not cost you any recovery. Living in the Eastern Suburbs you have the coastal walk, Maroubra beach and Centennial Park on your doorstep, so there is not much excuse. With daylight saving in since early October, there is enough light for a walk after dinner again.

5. Protect your sleep like it is a training variable

Seven hours, phone out of the bedroom, and no alcohol inside three hours of bed. It is the least glamorous item on this list and it is usually the one that makes the rest work, because a man who has slept makes better food decisions at 4pm than a man who has not.

The numbers to aim for

Targets stop this from being vibes.

• 0.5 to 1kg a week. The Better Health Channel calls this reasonable and more likely to be maintained. Faster than that and you are buying back muscle loss and a rebound.
• Waist under 94cm. The Better Health Channel's threshold for men. Measure at the belly button, same time of day, once a fortnight.
• Two strength sessions a week, minimum. Non-negotiable, as above.
• 1.6 to 2.0g of protein per kg. Work out your number once and stop guessing.
• 8,000 to 10,000 steps a day. Not a magic figure, just a useful one.

If you want 10kg gone, the realistic window is 12 to 20 weeks at that rate, which we work through properly in how long it takes to lose 10kg. Starting now, 10kg by late February is comfortably achievable. Starting in January, it is not.

The four mistakes I see men over 40 make

• All or nothing. Six weeks of five sessions a week and a meal plan, then an injury or a work trip, then six months off. The man who trains three times a week for a year beats him comfortably. Adherence is the whole game.
• Cardio only. Running off the weight works until you look in the mirror and realise you are a smaller, softer version of the same shape. You wanted to lose fat, not mass.
• Training through something that needs assessing. Shoulders, lower backs and knees do not fix themselves at 45. Get it looked at and train around it, properly, rather than loading a bad pattern twice a week for a year.
• Chasing belly fat specifically. You cannot spot-reduce. The belly goes when total body fat goes, and the fat that matters most for your health is the deeper stuff around your organs, which we cover in our guide to visceral fat and in how to lose stubborn belly fat.

A realistic week for a 45 year old with a job and kids

This is close to what the men who get results at 6X actually do, and it is far less than most people imagine.

• Two strength sessions, 45 minutes each, booked in like meetings. Tuesday and Thursday mornings work for most.
• One extra session you enjoy, whether that is a group session, boxing or a swim at Maroubra.
• A 30 minute walk most days, often the school run or after dinner.
• 30 to 40g of protein at three meals. No tracking required once you know what that looks like.
• Two alcohol-free weeknights, and a plan for the weekend rather than a vague intention.

That is about four hours a week. Men tell me they do not have time for fat loss, and what they usually mean is that they do not have time for the twelve-hour-a-week version they saw online. Nobody is asking for that.

One practical note: the Better Health Channel advises checking with your doctor before starting physical activity if you are overweight, over 40, or have not exercised regularly for a long time. If that is you, get the tick and then get started.

Why starting now beats starting in January

It is mid-October. There are just under 10 weeks until Christmas, Term 4 has just started, and Sydney's summer begins in about six weeks. Every man who starts in the first week of January is starting from a worse place than he is in right now, after six weeks of Christmas parties, Melbourne Cup lunches and a fortnight off. Starting now means you arrive at Christmas lighter and use January to keep going instead of to dig out.

In my experience the men who change their body shape are not the most motivated ones. They are the ones who picked an unglamorous plan in October and were still doing it in March.

Where to start if you are in the Eastern Suburbs

We are a boutique studio on Malabar Road in Maroubra and this is most of what we do: men and women in their thirties, forties and fifties who want 5kg or more gone and want somebody to hold them to it. Structured programs, a monthly body composition scan so you can see whether you are losing fat or muscle, and a coach who notices when you miss a week. If you want the shortest version of a start, our 28-Day Kickstart gets you training, measured and eating properly inside a month, with a guarantee attached.

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