Why losing weight gets harder after 40
Let's be honest: losing weight is a challenge at any age. But as a woman in perimenopause or menopause, a whole layer of complexity is added. It's not your fault that the approach that used to work no longer does. Your body has literally changed.
From your early 40s, your hormonal balance begins to shift. The ovaries gradually produce less oestrogen and progesterone, while other hormones — such as cortisol and insulin — start playing a greater role in how your body handles energy. This has direct consequences for your metabolism, your fat storage and your appetite.
At the same time, from your 30s onwards you lose on average 3 to 8 percent of muscle mass per decade. Muscles are metabolically active tissue: the more muscle mass you have, the more calories you burn at rest. Less muscle simply means a lower basal metabolic rate. Your body needs less energy, but your eating pattern has stayed the same.
Your thyroid also plays a role. In many women, thyroid function slows around menopause — sometimes subtly, sometimes noticeably. A sluggish thyroid lowers your metabolism further and can lead to fatigue, fluid retention and weight gain.
The interplay of all these factors means that the standard ‘eat less, move more’ formula is no longer sufficient. Your body calls for a different approach — one that takes your hormonal reality into account.
Hormones and weight: what exactly changes
To understand why losing weight during menopause is so difficult, it helps to know which hormones are involved and what they do.
Oestrogen: the great regulator
Oestrogen is more than a sex hormone. It influences how your body stores fat, how sensitive your cells are to insulin, and even how full you feel after a meal. When oestrogen declines, the pattern of fat storage changes: instead of hips and thighs, fat accumulates around your belly. This visceral fat is not only cosmetically different — it is metabolically more active and carries health risks.
Declining oestrogen also reduces your sensitivity to leptin, the hormone that tells your brain you have eaten enough. The result: you feel less full and have more cravings, especially for carbohydrate-rich and sweet foods.
Insulin: the blood sugar connection
Insulin resistance is one of the most underestimated causes of weight gain during menopause. As oestrogen declines, your cells become less sensitive to insulin. Your pancreas has to produce more insulin to clear the same amount of glucose from your blood. The problem: insulin is also a fat-storage hormone. The more insulin circulating, the harder it becomes to burn fat.
Research published in the journal Diabetes Care shows that insulin resistance in women increases significantly around menopause, independent of age and weight. This explains why even women who have always been slim suddenly struggle with their weight.
Cortisol: the stress hormone
During perimenopause, many women are more susceptible to stress. Hormonal fluctuations disrupt your stress regulation, causing cortisol levels to remain chronically elevated. Cortisol stimulates the storage of belly fat, breaks down muscle mass and increases your appetite — a triple assault on your weight. Moreover, chronically elevated cortisol disrupts your sleep, which further compounds the problem.
Progesterone: the calming hormone
Progesterone is one of the first hormones to decline in perimenopause. It has a calming effect on your nervous system and supports good sleep. When progesterone drops, sleep problems and restlessness increase. Poor sleep is itself a risk factor for weight gain: it raises cortisol, disrupts your appetite hormones (ghrelin and leptin) and reduces your willpower to make healthy choices.
In summary: Weight gain during menopause is not a matter of willpower. It is the result of declining oestrogen (changed fat storage, more cravings), increasing insulin resistance (more fat storage), elevated cortisol (belly fat, muscle loss) and declining progesterone (poor sleep). These hormones work together and amplify each other's effects.
Belly fat during menopause: more than a cosmetic problem
Many women notice that their weight is shifting: the jeans no longer fit while the number on the scales barely changes. That's because body composition is changing: you lose muscle mass and gain fat mass, especially around the waist.
This belly fat — also known as visceral fat — is not under the skin but around your organs. It is metabolically active tissue that releases inflammatory substances and raises your risk of cardiovascular disease, type 2 diabetes and certain forms of cancer. The International Menopause Society warns that the increase in visceral fat around menopause is one of the most important health risks for women at this stage of life.
The good news: visceral fat responds well to the right lifestyle adjustments. Unlike subcutaneous fat, which can be stubborn, you can reduce visceral fat relatively effectively through the right combination of nutrition, strength training and stress management — precisely the approach described in this article.
Nutrition that works: high-protein and blood-sugar-stable eating
If there is one dietary change that makes the biggest difference for women during menopause, it is this: eat more protein and stabilise your blood sugar. No crash diets, no skipping meals, no extreme restriction. Quite the opposite.
Protein: the cornerstone of weight loss after 40
Protein is essential for three reasons. First, it helps maintain and build muscle mass — crucial now that you are naturally losing muscle. Second, protein has the highest satiating effect of all macronutrients: you feel full longer and have fewer cravings. Third, digesting protein costs more energy than digesting carbohydrates or fats (the so-called thermic effect), so you burn more net calories.
Aim for at least 1.2 to 1.6 grams of protein per kilogram of body weight per day. At a weight of 70 kilograms, that is 84 to 112 grams of protein. Spread this evenly across your meals — at least 25 to 30 grams per meal — for optimal muscle protein synthesis.
Good protein sources: eggs, chicken, fish (especially oily fish such as salmon and mackerel), Greek yoghurt, cottage cheese, legumes, tofu, tempeh and nuts.
Blood sugar stabilisation: the key to fewer cravings
Stable blood sugar levels are essential for weight loss during menopause. Every blood sugar spike is followed by a dip, which leads to cravings, fatigue and the urge to snack. By keeping your blood sugar stable, you prevent this rollercoaster and make it easier for your body to burn fat rather than store it.
Practical tips for blood sugar stabilisation:
- Start every meal with vegetables or protein, not carbohydrates
- Always combine carbohydrates with protein, healthy fats or fibre
- Choose complex carbohydrates: sweet potato, oats, quinoa, legumes
- Avoid fruit juices, soft drinks and other liquid sugars
- Take a short 10 to 15 minute walk after eating. This helps your muscles absorb glucose
Healthy fats: not the enemy
Fat has been the villain for years, but for women in menopause, healthy fats are indispensable. Omega-3 fatty acids (from oily fish, walnuts and flaxseed) have an anti-inflammatory effect and support your hormone production. Avocado, olive oil and nuts provide monounsaturated fats that protect your heart health and help you stay full longer.
A day of high-protein, blood-sugar-stable eating:
- Breakfast: Two eggs with avocado, tomato and a slice of wholegrain bread
- Lunch: Large salad with grilled chicken, chickpeas, feta, walnuts and olive oil
- Snack: Handful of almonds with a piece of dark chocolate (70%+)
- Dinner: Oven-baked salmon with roasted vegetables and quinoa
- Evening: Herbal tea with a bowl of full-fat yoghurt and cinnamon
Exercise: why strength training is now essential
If you think you need to start running to lose weight, we have good news: you don't. In fact, for women in menopause, strength training is often far more effective than cardio when it comes to weight loss and body composition.
Strength training: giving your metabolism a boost
Strength training is the most powerful tool against the muscle mass loss that accompanies menopause. By training two to three times per week with weights or your own bodyweight, you build (or maintain) muscle mass. More muscle means a higher basal metabolic rate: you burn more calories at rest, even sitting on the sofa.
Research in the Journal of Clinical Endocrinology & Metabolism shows that women after menopause who do regular strength training have significantly less visceral fat than women who only do cardio. Moreover, strength training improves your insulin sensitivity, allowing your body to process glucose better and store less fat.
You don't need to become a bodybuilder. Start simply with exercises such as squats, lunges, deadlifts and push-ups. Use weights that challenge you but with which you can still perform the exercise properly. Build up gradually in weight and intensity.
Walking: the underestimated fat burner
In addition to strength training, daily walking is one of the most effective forms of exercise for women in menopause. Walking burns calories without raising your cortisol levels (as intense cardio can sometimes do), improves your insulin sensitivity and is good for your mental health. Aim for at least 7,000 to 10,000 steps per day.
Avoid overtraining
A common mistake is training too much and too intensively. Long, exhausting cardio sessions can raise your cortisol levels, which is counterproductive. Your body interprets excessive exertion as stress and therefore holds on to fat reserves. The ideal combination for women in menopause is two to three strength training sessions per week, daily walking and sufficient rest and recovery.
Sleep and stress: the underestimated factors
You can have your nutrition and training perfectly in order, but if your sleep and stress levels are off, losing weight remains an uphill battle. Sleep and stress are the silent saboteurs of your weight.
Why sleep affects everything
During sleep, your body recovers, hormones are produced and your metabolism is regulated. Research shows that just one bad night's sleep leads to elevated ghrelin levels (the hunger hormone), reduced leptin (the satiety hormone) and decreased insulin sensitivity. In other words: after a bad night you have more cravings, feel full less quickly and your body stores fat more easily.
Women in perimenopause and menopause often struggle with sleep problems due to declining progesterone, night sweats and hot flushes. It is a vicious cycle: poor sleep leads to weight gain, and excess weight worsens sleep problems.
Tips for better sleep:
- Go to bed and wake up at the same time every day, including weekends
- Keep your bedroom cool (16–18°C), dark and quiet
- Avoid screens for at least an hour before bedtime
- Don't drink caffeine after 2:00 PM
- Consider magnesium supplementation before bed (in consultation with your doctor)
- An evening routine with relaxing activities such as reading, breathing exercises or a warm bath
Chronic stress: the cortisol factory
Chronic stress keeps your cortisol levels artificially high. This hormone stimulates belly fat storage, raises your blood sugar and breaks down muscle mass. In addition, chronic stress leads many women to emotional eating — seeking comfort in food, often high in sugar and calories.
Stress management is not a luxury but a necessity for women who want to lose weight during menopause. Effective methods include:
- 10 minutes of breathing exercises or meditation daily
- Walking in nature
- Setting boundaries at work and with social obligations
- Exercise that relaxes: yoga, tai chi, swimming
- Social connection: talking about what's on your mind
Common mistakes when trying to lose weight during menopause
Most women who struggle with their weight during menopause unknowingly make mistakes that actually make weight loss harder. Do you recognise any of these?
Mistake 1: Crash diets and extreme calorie restriction
It seems logical: if you want to lose weight, you just eat less. But for women in menopause, this is the biggest pitfall. Extreme calorie restriction (fewer than 1,200 calories per day) puts your body into conservation mode. Your metabolism slows, your cortisol rises and you lose muscle mass instead of fat. After the diet you gain weight back faster than before. That is the notorious yo-yo effect.
Instead: aim for a mild calorie deficit of at most 300 to 500 calories per day, with enough protein to protect your muscle mass.
Mistake 2: Doing only cardio
Many women instinctively reach for running, cycling or group classes when they want to lose weight. While cardio burns calories, it does little for your muscle mass. Without strength training you lose muscle, your metabolism drops and you ultimately become a smaller version of yourself with the same body fat percentage. Always combine cardio with strength training.
Mistake 3: Eating too little protein
Many women unknowingly eat too little protein, especially at breakfast and lunch. A cracker with cheese or a salad without a protein source does not provide enough to nourish your muscles and maintain your satiety. Make sure every meal includes a substantial protein source.
Mistake 4: Ignoring sleep and stress
You can follow the perfect nutrition and training schedule, but if you chronically sleep too little or are under high stress, your body will not cooperate. Sleep and stress are not optional. They are the foundation on which everything else rests.
Mistake 5: Focusing only on the scale
The number on the scale tells only part of the story. If you do strength training, you build muscle mass while losing fat. Muscles weigh more than fat, so the scale may stay the same while your clothing size drops and you feel fitter. Also measure your waist circumference and pay attention to how your clothes fit. Those are better indicators of progress.
Your action plan: start today
Losing weight during menopause requires a different approach, but it is certainly not impossible. It takes patience, self-compassion and a willingness to look at your health in a new way. Here is a concrete plan to get started.
Weeks 1–2: Laying the foundation
- Increase your protein intake. Aim for at least 25–30 grams of protein per meal. Start with breakfast: replace bread with toppings with eggs, yoghurt with nuts or a protein-rich smoothie.
- Stabilise your blood sugar. Don't eat carbohydrates without protein or fat alongside. Take a short walk after eating.
- Improve your sleep hygiene. Go to bed at a fixed time and make your bedroom cooler and darker.
Weeks 3–4: Building up
- Start strength training. Begin with two sessions per week. Full-body exercises with your own bodyweight or light weights are a great start.
- Move more in daily life. Aim for 8,000 to 10,000 steps per day.
- Add stress management. Choose one technique (breathing, meditation, walking) and do it for 10 minutes daily.
Week 5 and beyond: Sustaining and refining
- Evaluate and adjust. How do you feel? How do your clothes fit? Adjust your nutrition and training based on what you notice, not only on the scale.
- Build up your strength training. Gradually increase the weight and intensity.
- Be patient. Sustainable weight loss for women in menopause is slower: 0.5 to 1 kilogram per week is realistic and healthy.
Most importantly: Be kind to yourself. Your body is changing, and that is normal. Losing weight during menopause is not about the perfect body, but about feeling healthy and energetic. Don't focus on what your body can no longer do, but on what it can do when you give it the right fuel, movement and rest.
Do you want not only to know what to do, but also to be guided in putting it into practice? At FEM Rebalance we work with a proven approach for women 40+ who want to improve their weight, energy and hormone balance. No crash diets or extreme schedules, but a sustainable lifestyle that suits you — with nutrition, movement and personal guidance.