Keeping weight off is harder than losing it: reviews of long-term dieting studies find that most people regain more than half of the weight within two years, and around 80 per cent of it within five. The people who keep it off are not stricter than everyone else. They treat the months after the diet as a skill of its own, with a planned maintenance phase, a short list of habits they never drop, and a new normal instead of the old one. Weight maintenance is the phase after fat loss where you eat at your new energy needs and hold your weight inside a small range. Mr PT Fitness is a private home studio at 35 McIntosh Road, Dee Why, run by Matt Reilly, a personal trainer with 10+ years' experience, and most of the clients who walk in have lost weight before. Losing it was never the problem.
Why is maintaining weight harder than losing it?
Maintaining is harder than losing because losing has a finish line and maintaining does not. A diet is a short, clear project with a daily rule and a number that drops. Maintenance is open-ended, has no reward on the scale, and starts just as the habits that got the weight off begin to feel optional.
The body changes the maths as well. A lighter body uses less energy each day, so at 85kg you need several hundred fewer calories than you did at 95kg. The eating pattern that held you at 95kg will slowly take you back there, even though nothing about it feels like overeating.
Appetite is the other half. Many people notice that hunger runs higher for months after a diet ends, and that favourite foods feel harder to stop at one serve. That is a normal response to a period of eating less, not a character flaw, and it is one reason a gentle maintenance phase works better than a hard stop.
Then the social cues fade. Nobody asks how the diet is going, the tracking app gets deleted, the Monday weigh-in slips to "sometime this month". By the time the jeans feel tight, 3 or 4kg have usually come back, and the only tool most people know is another diet.
What does a maintenance phase actually look like?
A maintenance phase is 8 to 12 weeks of eating at your new energy needs, with the goal of holding your weight within about 2kg rather than losing more. You add food back slowly, keep training and steps exactly where they were, and judge the weekly average instead of a single morning.
The food comes back in steps, not all at once. Add roughly one extra serve a week, a bigger lunch or a snack, and watch the weekly average. If it holds flat for two weeks, add the next serve. If it climbs more than a kilo, hold where you are. Most people find their maintenance intake within four to six weeks this way, and it is usually more food than they expected.
| Fat loss phase | Maintenance phase | |
|---|---|---|
| Food intake | A modest deficit, roughly 300 to 500 calories under your needs | At your needs. Add one serve a week until the weekly average holds flat |
| Scale goal | Down 0.25 to 0.5kg a week on the weekly average | Flat, inside a 2kg band |
| Protein and steps | A palm of protein each meal, 7,000 to 10,000 steps a day | Unchanged. These two are the floor, not the diet |
| Strength training | Two or three sessions a week | Two or three sessions a week. This is what protects the muscle you keep |
| Treat meals | One or two a week, planned | Two or three a week, planned |
| Length | 8 to 16 weeks | At least 8 to 12 weeks, then decide whether to lose more |
If you want to lose more after that, run another fat loss phase, then another maintenance block. Alternating the two looks slower than one long diet on paper and is faster in practice, because far fewer people quit. Why crash diets fail covers what happens when the long version is pushed too hard.
Lost the weight and worried about keeping it off?
Come in for a free 15-minute consult at the Dee Why studio. We will set your maintenance targets, your training week and a simple monthly check so the weight stays gone. Book here or call 0422 745 334.
Which habits actually keep weight off?
The habits that keep weight off are boring and repeatable: a protein-based breakfast, a high daily step count, two or three strength sessions a week, a similar eating pattern on weekends and weekdays, and a weekly weigh-in. Long-term studies of people who have kept weight off for years turn up the same short list every time.
The National Weight Control Registry in the United States has followed thousands of people who have kept off 13kg or more for at least a year. Around three quarters of them eat breakfast most days and weigh themselves at least weekly, most do close to an hour of physical activity a day with walking the most common form, and most eat in a similar way on weekends and weekdays. None of that is dramatic. All of it is consistent.
- Protein at breakfast, every day: eggs, Greek yoghurt, or leftovers from dinner. Starting the day full is the cheapest way to keep the afternoon in check.
- Steps as the floor: 7,000 to 10,000 most days. A morning loop of the Dee Why beach path and back is about 5,000 on its own.
- Two or three strength sessions a week: this is what keeps the weight you lost from coming back as fat and the weight you kept as muscle. Thirty to forty-five minutes is plenty.
- Weekends that look like weekdays: not identical, just similar. How to stop weekend eating undoing your week walks through the planned-weekend version.
- A weekly weigh-in, averaged: same scale, same morning routine, and look at the seven-day average, not the single number. A waist measurement once a month backs it up.
- A rule for drift: if the weekly average sits 2kg above your band for two weeks, tighten the next two to three weeks slightly, then return to maintenance. Small corrections early beat a new diet later.
Why is "back to normal" the trap?
Back to normal is the trap because normal is the eating and activity pattern that built the weight in the first place. If the diet was a temporary detour from that pattern, the weight returns as soon as the detour ends, and that is exactly what the long-term regain studies describe.
It rarely happens in one go. Breakfast gets skipped on busy mornings. Steps drop over winter. The second treat meal becomes the third and the fourth. The scale has not been touched for a month, and the training has slipped to once a week. Each change is small. Together they add up to a few hundred calories a day over what a lighter body needs, which is enough to regain a kilo a month without ever feeling like you have gone off the rails.
The fix is to decide, before the diet ends, what the new normal is. Write down the breakfast, the step target, the training days and the weigh-in day. That is the plan you return to after a holiday, a sick week or a busy month at work, not the old one.
Two situations need more than a plan. If your weight is climbing despite consistent habits, or alongside fatigue, low mood or a change in sleep, see your GP. And if the fear of regaining has turned into hard restriction, cycles of restricting and overeating, or real distress around food, talk to your GP or an Accredited Practising Dietitian. For training around pain or an old injury, a physio is the right first stop.
How do you build a body you can keep?
You build a body you can keep by choosing a weight your real life can hold, not the lowest number you have ever seen on the scale. A weight you maintain with habits you enjoy beats a lower one that needs constant restriction and is usually gone within a year.
Ask one question at the end of a fat loss phase: could I eat and move like this for the next five years? If the honest answer is no, you are still dieting, and the maintenance phase is the place to find the version you can live with. For most people that is a little heavier than the goal they first wrote down, and a lot more comfortable.
Strength training is the part most people skip, and it is the part that makes the kept weight look and feel the way they wanted. Two sessions a week at the studio, plus steps and a protein habit, is a routine clients in Dee Why, Brookvale, Curl Curl and Collaroy have held for years, through school holidays, winters and work trips.
If you want help setting it up, the nutrition plan from $120 includes maintenance targets as well as the fat loss phase, alongside 1-on-1 training from $50 a session, small group from $25 a person, or online coaching from $50 a week for monthly check-ins. It is general guidance within a personal trainer's scope, not a dietitian service.
General information, not individual medical or dietary advice. See your GP or an Accredited Practising Dietitian (APD) for your situation.
Frequently asked questions
How do I keep weight off?
Keep weight off by treating the months after a diet as a planned maintenance phase. Eat at your new energy needs, keep a protein breakfast, 7,000 to 10,000 steps most days and two strength sessions a week, weigh in weekly and use the average, and correct small gains early rather than starting another diet.
Why did I regain the weight?
Most regain comes from going back to the eating and activity pattern that built the weight, at a time when a lighter body needs less food and appetite often runs higher. The diet ended, the habits ended with it, and the old normal returned. It is common, and it is fixable with a maintenance plan.
How long until my weight is stable?
Give it 8 to 12 weeks of eating at maintenance. Weight usually settles into a 1 to 2kg band in the first few weeks as food, salt and water return to normal, then holds. Judge stability on your weekly average over a month, not on a single morning weigh-in.
Keep the weight off this time
Free 15-minute consult at the Dee Why studio. We will set your maintenance targets, build the training week around your life and check the trend every month. Clients come from Dee Why, Brookvale, Curl Curl and Collaroy.