You might be putting in the effort — swapping your morning nasi lemak for plain oats, squeezing in workouts three to four times a week, and hitting your daily steps. However, the moment when you step on the scale one morning or look at yourself in the mirror, it feels like nothing has changed.
It’s frustrating, but the truth is, weight loss is not just about “calories in versus calories out.” If it were, skipping dinner would instantly give everyone a toned waistline.
The reality is that losing weight is a complex biological process. If you are struggling to see results, this is not because you lack willpower. Your body is designed for survival, not aesthetics, and sometimes it actively slows down fat loss to protect you.
Let’s break down the science behind why progress stalls, and what you can do to get things moving again.
The Science of the Stall
Before you can truly understand why fat loss has stalled, it helps to first understand how your body perceives weight loss.
To you, dropping 5 kg is a health goal. But to your body, it can look like a famine in process.
The Survival Mechanism
When you cut calories aggressively, your body does not know you are intentionally on a diet. It thinks food is scarce. To protect you, it triggers a process called metabolic adaptation. Essentially, your body becomes hyper-efficient, learning to do more with less fuel.
A study shows that when you restrict calories too severely for too long, your resting metabolic rate (the calories you burn just by existing) decreases. This means that even though you are eating less, your body is burning less, which can significantly reduce the effectiveness of your calorie deficit, making weight loss slower than expected.
This is often why people hit a “plateau” after dieting for a period of time. You are not doing anything wrong; it’s just that your metabolism has slowed down to match your intake to keep you alive.
Insulin and Cortisol
More than metabolism, your hormones play a massive role. When you eat, particularly carbohydrates, your blood sugar rises, and insulin is released to shuttle that sugar into your cells for energy.
However, if your insulin levels are chronically high due to frequent snacking, your body tends to stay in ‘storage mode.’ High insulin levels are known to inhibit lipolysis, the biological process of fat breakdown. Put simply, your body is less likely to tap into fat stores for energy while insulin is elevated.
Another hormone that can affect visceral fat adipocytes is cortisol, known as the stress hormone. High cortisol breaks down muscle tissue and encourages fat storage specifically in the belly area.
Hidden Blockers in Our Diet
Even if you think you are eating clean, there are many foods filled with hidden traps that can spike insulin and derail fat loss.
The “Refined” Morning
Many of us grew up thinking a light breakfast of toast or porridge is the healthy choice. However, foods like white bread, traditional kaya toast, white rice porridge, instant oats, pancakes made with refined flour, and sweetened breakfast cereals are all considered refined grains.
Refined grains have been stripped of their fibre and nutrients, leaving behind pure starch. They digest rapidly, which causes a massive spike in blood sugar. Your body responds with a flood of insulin.
For the next few hours, your body prioritises burning that quick sugar energy, effectively pausing fat burning. Furthermore, since blood sugar crashes just as fast as it spikes, you will likely feel hungry and crave more sugar within 1–3 hours.
This rollercoaster makes it difficult to stay full and satisfied for long periods, making healthy weight management even more challenging.
The Sugar You Don’t See
We all know that desserts are sugary. But added sugars are lurking in places you might not expect. That cup of yoghurt drink you think is healthy? It can contain as much sugar as a soft drink. The sauce in your fish soup can be loaded with sugar and starch to thicken it.
Then there’s the culture of sweet drinks — from bubble tea and soft drinks to sweetened teas and fruit juices. Liquid sugar doesn’t trigger the same satiety signals as solid food. You can drink 500 calories of sweet tea and still eat a full dinner, which could lead to a significant caloric surplus without you even realising it.
The Processed Food Dilemma
Processed foods, from fish balls to hot dogs and instant noodles, are staples for many busy people. However, these foods are usually high in sodium, preservatives, and artificial trans fats.
Aside from the calories, these ingredients can cause systemic inflammation in the body. Inflammation disrupts the hormones that regulate your metabolism, making fat burning an uphill battle.
The Lifestyle Blockers: Not Just About the Gym
You might be hitting the gym for an hour a day, but what are you doing for the other 23 hours?
The Sedentary Work Culture
Singaporeans work some of the longest hours in the world. If you sit at a desk for 8 to 10 hours a day, you are considered sedentary, even if you exercise in the evening.
Prolonged sitting suppresses the production of an enzyme called lipoprotein lipase, which is responsible for breaking down fat in the bloodstream and using it as fuel. When you sit all day, the activity of this enzyme drops sharply. You are essentially telling your body to slow down fat burning.
The Sleep-Fat Connection
For some, surviving on just five hours of sleep is seen as a badge of honour, but research shows that insufficient sleep is linked to weight gain and an expanding waistline. Sleep deprivation increases ghrelin, the hormone that signals hunger, making you crave high-calorie foods. At the same time, it lowers leptin, reducing feelings of fullness, and can impair the body’s response to insulin, affecting fat metabolism.
In short, inadequate sleep makes sustainable fat loss much more difficult.
Fat Burning Tips That Can Help You
Now that we have identified the blockers, here is how you can overcome them.
Optimise Your Heart Rate Zones
Many people think they need to sprint until they collapse to lose weight. High intensity is good, but it isn’t the only way. To maximise fat oxidation, you need to understand heart rate zones.
Zone 2 training (sometimes called the fat-burning zone) occurs at about 60-70% of your maximum heart rate. At this intensity, your body primarily uses fat as fuel rather than glucose. This is the pace where you can hold a conversation but still feel like you are working.
Do not just rely on High-Intensity Interval Training (HIIT). Incorporate 30 to 45 minutes of steady-state Zone 2 cardio, like a brisk walk or slow jog, into your routine to improve your metabolic flexibility without significantly elevating cortisol
Prioritise Protein and Fibre to Feel Full
One of the best fat-burning tips is to change what you eat, not just how much. Protein has a high thermic effect, meaning your body burns more calories digesting protein than it does digesting carbs or fat. Protein also keeps you full for longer because it digests slowly, increases satiety hormones, reduces the hunger hormone ghrelin, and helps stabilise your blood sugar.
If you are at the Cai Png stall, ask for less rice (or brown rice if available) and double up on the lean meat or tofu. Add a hefty serving of green vegetables. The fibre in veggies slows down digestion and stabilises your blood sugar, so you feel full for longer.
Move More, Sit Less (The NEAT Approach)
NEAT covers all the calories you burn doing everything that isn’t sleeping, eating, or sports-like exercise. Examples of NEAT include walking to the bus stop, standing on the MRT, or doing household chores.
Aim to accumulate minutes of moderate activity throughout the day. If you have a desk job, set a timer to stand up and stretch every hour. Or choose to walk to a hawker centre that’s slightly farther for lunch.
These small movements add up to hundreds of extra calories burned daily and keep your fat-burning enzymes active.
Swap Refined for Complex
You don’t have to cut out carbohydrates entirely, but choosing the right kinds makes a big difference.
Swap refined grains like white bread and jasmine rice for complex carbohydrates like rolled oats, brown rice, or sweet potatoes.
These foods digest more slowly because of their fibre content and structure, providing a steadier release of glucose into the bloodstream. This helps keep blood sugar and insulin levels more stable, which supports better energy control and makes it easier for your body to access fat stores between meals.
Conclusion
Effective fat loss isn’t about extreme dieting or exercising intensely. It’s about addressing the biological factors that can block your progress.
Sustainable fat loss is a journey of consistency and discipline. Start by choosing one strategy to implement this week — perhaps going to bed 30 minutes earlier or prioritising fat burning foods by swapping your morning toast for eggs.
Small, consistent changes in your daily routine are the key to unlocking long-term fat loss and better overall health.
