Have you been eating low calories but can’t seem to shift your weight — or feel stuck in a weight loss plateau?
You’re not alone. This is one of the most common frustrations I hear from clients, especially those who’ve been “doing everything right”: tracking, cutting calories, training regularly, and yet the scale won’t budge. Sometimes it’s even going up.
When you're doing everything "right" and still not seeing results, it's demoralising. And the instinct is usually to cut calories further, which often makes the whole situation worse.
Here's what's actually happening, and what to do about it.
What’s really going on: metabolic adaptation
When you significantly reduce your calorie intake, your body responds by adapting. This is sometimes called "starvation mode," which sounds dramatic, but it's really just your body's built-in survival mechanism doing its job.
If your body isn't receiving enough energy consistently, it starts conserving fuel by slowing several processes down. Over time this can look like:
A drop in your resting metabolic rate (the calories you burn just existing)
Hormonal changes that affect energy, mood and hunger signals
Poor sleep and slower recovery from exercise
Increased cravings, particularly for sugar and high-calorie foods
Reduced spontaneous movement throughout the day without you noticing
Weight loss stalling completely, or weight creeping back up
This is particularly common if your intake has dropped below your BMR (basal metabolic rate). This is the number of calories your body needs just to maintain basic function at complete rest. Breathing, circulating blood, keeping your organs running. When intake falls consistently below this number, your body reads it as a threat rather than a weight loss strategy.
Why this creates plateaus – and why eating less makes it worse
Once your metabolism has adapted to a lower intake, your body becomes more efficient at operating on less. This creates a frustrating cycle:
You reduce calories. Your body adapts and burns less. Weight loss slows. You reduce calories again. Your body adapts further. Progress stalls entirely.
On top of the metabolic slowdown, low energy from under-eating tends to reduce your NEAT (non-exercise activity thermogenesis), the calories you burn through everyday movement like walking, fidgeting and general activity. You might notice you feel less motivated to move, take the lift instead of the stairs, or feel too tired to do much after work. These small reductions in daily movement add up significantly over time and further close the gap between calories in and calories out.
The result is that the harder you try to restrict, the less your body responds. And the more frustrated you become.
How to tell if this is happening to you
A few common signs that your body has adapted to chronic undereating:
You're eating 1200 calories or less and not losing weight
You feel cold more often than usual
Your energy is consistently low regardless of sleep
Your workouts feel harder than they used to at the same effort level
You're experiencing stronger cravings, particularly at night
Your mood and motivation are noticeably lower
Your menstrual cycle has become irregular or lighter than usual
You've been in a deficit for months with little to show for it
If several of these sound familiar, the answer is almost certainly not to cut further. It's to reset.
What to do: how to break the plateau without gaining fat
1. Find out what your body actually needs
The first step is understanding your true maintenance calories and BMR rather than guessing. Most women who come to me undereating have set their target based on a generic app recommendation or a number they read somewhere, not based on their actual body composition, activity level and lifestyle.
Fill out my free Macros and Metabolic Assessment and I'll personally calculate your calorie and macro targets based on your specific details. The number I send back is often significantly higher than what women have been eating, and that's the point. You might be more under-fuelled than you realise.
2. Consider a reverse diet
Reverse dieting is the process of gradually increasing calories back toward maintenance to restore metabolic function before attempting another deficit. It's slow, it requires patience, and it works.
The goal isn't to gain fat. It's to bring your metabolism back to a point where a moderate deficit actually produces results. Most women find that with a properly calibrated intake, they start seeing progress at calorie levels that would have seemed impossibly high based on their previous approach.
A good starting point is increasing your intake by 100-150 calories per week and monitoring how your body responds over 4-6 weeks before re-entering a deficit.
3. Prioritise strength training
Muscle is metabolically active tissue, which means more muscle equals more calories burned at rest. Resistance training also helps preserve lean mass during a deficit, which is essential for keeping your metabolism functioning well as you lose fat.
If your current routine is mostly cardio, adding two to three resistance sessions per week is one of the most impactful changes you can make for both body composition and metabolic health long-term.
4. Vary your movement rather than just adding more
If you've been doing the same training routine for months, your body has likely adapted to it. Switching things up, whether that's adding intervals, changing the structure of your sessions, or simply increasing your daily step count, can help stimulate new adaptation.
More isn't always better… but different often is.
5. Support recovery properly
Under-eating and overtraining are often two sides of the same problem. Your body needs adequate fuel, sleep and rest to recover from training and maintain hormonal balance. Without these, the stress hormone cortisol stays elevated, which actively works against fat loss and can cause the body to hold onto weight as a protective mechanism.
Prioritise seven to nine hours of sleep, take at least one to two full rest days per week, and treat your recovery as seriously as your training.
Want specific answers rather than general advice? The Build My Diet assessment looks at your current intake,your training and your lifestyle and identifies exactly what needs to adjust. It's a personalised approach — not a generic plan.
What the FLEX Method actually addresses
The first phase of my coaching program focuses on fuelling your metabolism rather than cutting calories further. Before we ever talk about a deficit, we make sure you're eating enough to support your activity level, your hormones and your recovery.
This isn't about eating more forever. It's about building a strong metabolic foundation so that when we do create a deficit, your body actually responds to it. Most of my clients are genuinely surprised at how much they can eat and still lose fat when their intake and macro balance are properly calibrated.
If you want to understand what this could look like for you specifically, a free 30-minute consult is the best place to start.
The most important thing to understand
Eating less is not always the answer. In many cases it's actively the problem.
Your body is not broken. It's responding exactly as it's designed to when it feels under-resourced. The path forward is working with it, not against it. And that almost always starts with eating more strategically, not less.
Most importantly: listen to your body
Nutrition isn’t just about calories and macros. Your energy, mood, sleep, cravings and cycle (if applicable) all offer clues. Sometimes, eating more strategically — not less — is what finally gets things moving again.
Start here:
Not sure what your calorie and macro targets should actually be? Fill out the free Macros and Metabolic Assessment and I'll personally review your details and send your breakdown within 24 hours. It's the fastest way to find out whether under-eating is what's been holding you back.
👉 Get your free personalised macros here
Or if you're ready to go deeper, browse the 6-week and 8-week meal plans: done-for-you plans built around real food at calorie ranges that actually support fat loss.
Or reach out to chat about 1:1 coaching and the FLEX Method
Curious about more simple nutrition tips? Join me at Flex Food Life and join my Facebook group community for real, practical advice that fits into your lifestyle!
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