Why You Keep Regaining the Weight You Lose
The 3 Foundations of Sustainable Fat Loss
If you've ever lost weight only to gain it back a few months later, you're not alone.
As a Nutritionist and Naturopath in London, one of the most common frustrations I hear from clients is: "I've lost weight before, but I can never seem to keep it off."
The good news is that this is rarely a willpower problem.
More often, it's because most diets focus on making the number on the scale go down as quickly as possible rather than helping you lose body fat while preserving muscle.
And that distinction matters.
The Hidden Problem with Rapid Weight Loss
When weight loss happens too quickly, your body doesn't just lose body fat.
It can also lose lean muscle tissue.
This is important because muscle acts as your body's metabolic engine. It helps you:
Burn more calories at rest
Regulate blood sugar
Improve insulin sensitivity
Support healthy ageing
Maintain long-term weight loss
When muscle mass decreases, your metabolism can slow down, making it easier to regain weight once normal eating patterns resume.
This is one reason why crash diets and extreme calorie restriction often lead to temporary results.
The Goal Shouldn't Be Weight Loss
The goal should be fat loss.
More specifically:
Lose body fat
Preserve muscle mass
Support metabolism
Create habits that are sustainable
A healthy rate of weight loss is generally around 0.5–1kg per week.
While losing weight faster may seem attractive, slower and more sustainable progress is often associated with better long-term success.
The First Foundation: Protein
One of the most powerful tools for preserving muscle during weight loss is adequate protein intake.
Protein helps:
Preserve lean muscle mass
Increase satiety
Reduce cravings
Support recovery from exercise
Improve blood sugar regulation
Many people trying to lose weight focus on calories but overlook protein.
This is a mistake.
How Much Protein Do You Need?
For active adults, current evidence suggests aiming for approximately:
1.5–2.0 grams of protein per kilogram of body weight per day
This range is particularly beneficial for those trying to lose body fat while maintaining muscle mass.
Example: A 60kg Woman
Protein target:
Minimum: 90g daily
Optimal range: 90–120g daily
Broken down across three meals:
Breakfast: 30–40g protein
Lunch: 30–40g protein
Dinner: 30–40g protein
Example: A 70kg Woman
Protein target:
Minimum: 105g daily
Optimal range: 105–140g daily
Broken down across three meals:
Breakfast: 35–45g protein
Lunch: 35–45g protein
Dinner: 35–45g protein
Example: An 80kg Woman
Protein target:
Minimum: 120g daily
Optimal range: 120–160g daily
Broken down across three meals:
Breakfast: 40–50g protein
Lunch: 40–50g protein
Dinner: 40–50g protein
What Does 40g Protein Look Like?
Breakfast:
250g Greek yogurt
1 scoop protein powder
Chia seeds
Lunch:
150–180g chicken breast
Large salad
Olive oil dressing
Dinner:
Salmon fillet
Vegetables
Sweet potato
Many women are surprised to discover they are only eating 15–20g of protein per meal when their body would benefit from closer to 30–40g.
The Second Foundation: Resistance Training
If protein provides the building blocks for muscle, resistance training provides the signal to keep it.
Resistance training includes:
Weight training
Resistance machines
Resistance bands
Bodyweight exercises
Without resistance training, the body has less reason to preserve muscle while dieting.
Why Resistance Training Matters
Resistance training helps:
Preserve muscle during weight loss
Increase strength
Improve insulin sensitivity
Improve body composition
Support long-term metabolic health
Reduce the risk of weight regain
Many women worry that lifting weights will make them bulky.
In reality, resistance training is one of the most effective ways to achieve a lean, toned physique while supporting healthy ageing.
What is Progressive Overload?
One of the most important principles in strength training is progressive overload.
This simply means gradually asking your muscles to do slightly more over time.
For example:
Week 1:
Leg press 30kg for 10 reps
Week 4:
Leg press 40kg for 10 reps
Week 8:
Leg press 60kg for 10 reps
Or:
Week 1:
3 sets
Week 4:
4 sets
Week 8:
Slightly heavier weight
Your muscles only adapt when they are challenged.
If you perform exactly the same workout with the same weights every week, progress will eventually stall.
How Often Should You Train?
For most people looking to lose body fat and maintain muscle:
3–5 resistance training sessions per week is an excellent target.
Aim to challenge yourself while maintaining good technique.
As a general guide, choose weights that feel approximately 7–8 out of 10 difficulty, meaning you could perform only 2–3 more repetitions before fatigue.
This is often where the best adaptations occur.
Why Muscle is the Secret to Keeping Weight Off
Most people focus on losing weight.
Very few focus on building or maintaining muscle.
Yet muscle is one of the strongest predictors of long-term metabolic health.
More muscle means:
✓ Higher calorie burn at rest
✓ Better blood sugar control
✓ Improved insulin sensitivity
✓ Better body composition
✓ Greater strength and confidence
✓ Reduced risk of weight regain
This is why the clients I work with as a Nutritionist and Naturopath in London focus on preserving muscle first and fat loss second.
The result?
Not just weight loss.
But sustainable weight loss.
The third Foundation : Fill Half Your Plate with Vegetables
While protein and resistance training are essential, there is a third habit that often makes weight loss much easier.
Fill half your plate with vegetables.
One of the biggest reasons people struggle to maintain a calorie deficit is hunger. Many diets focus on eating less food, which often leaves people feeling deprived and constantly thinking about their next meal.
A more sustainable approach is to increase the volume of your meals without dramatically increasing calories.
Vegetables such as broccoli, cabbage, courgette, cauliflower, peppers, mushrooms, leafy greens, asparagus, cucumber, tomatoes, and green beans are naturally low in calories but rich in fibre, vitamins, minerals, and antioxidants.
They help create meals that are larger, more satisfying, and more filling.
As a simple rule, I often encourage clients to aim for half of their lunch and dinner plate to come from vegetables. The remaining half can then be divided between a quality protein source and a portion of carbohydrates such as potatoes, rice, quinoa, or sweet potato.
The fibre found in vegetables slows digestion, supports blood sugar balance, improves digestive health, and helps keep you fuller for longer.
Many clients are surprised to discover that successful fat loss is not always about eating less food.
Often, it is about eating more of the right foods.
When combined with adequate protein intake and resistance training, a vegetable-rich plate can make maintaining a calorie deficit feel significantly easier and more sustainable.
The Best Combination for Long-Term Fat Loss
If your goal is to lose fat and keep it off, focus on:
✓ Protein at every meal
✓ Half the plate is filled with non-starchy vegetables
✓ 1.5–2g protein per kilogram body weight daily
✓ Resistance training 3–5 times weekly
✓ Progressive overload
✓ Daily movement such as walking
✓ A moderate calorie deficit rather than extreme dieting
Final Thoughts
If you've been stuck in a cycle of losing weight and gaining it back, the answer may not be eating less.
Instead, focus on building and preserving your metabolic engine.
The people who achieve the best long-term results are rarely those who lose weight the fastest.
They are the people who prioritise muscle, protein, strength, and sustainable habits.
As a Nutritionist and Naturopath in London, my goal is to help clients achieve lasting fat loss by supporting metabolism, improving body composition, balancing blood sugar, and creating habits that are realistic for everyday life.
Remember:
The goal isn't simply to weigh less.
The goal is to lose body fat, protect your muscle, and build a healthier metabolism that supports your results for years to come.
