MyMT™ Blog

New Research: The 5 ‘real’ reasons for your belly-fat weight gain in menopause.

"If your waist is ‘thickening’, your body-shape is changing and you are going into or through menopause, then let me explain why!"
[Dr Wendy Sweet, Women's Healthy Ageing Researcher & MyMT Coach]

When my own mother reached mid-life, it wasn’t spoken about, but thinking back I now realise that this was when her  health started to change. She put on weight around her middle, her knee joints and ankles became sore and her Doctor prescribed “heart pills” for her.

For a rural woman who was fit and active all her life, I never gave her changing health a thought. But I wish I had. Because as I began to head down the weight gain and changing health pathway myself I knew, through my women’s healthy ageing studies, that she could have turned all this changing health around.  If only she had known how to change her lifestyle to match her declining reproductive hormones in menopause rather than listening to all the dieting and exercising hype.

You see menopause is not just about our ovaries – declining oestrogen affects our sleep, blood vessels, heart, liver, muscles, insulin production, joints and ligaments too. All of these factors impact on our weight gain in mid-life. It’s a puzzle that I was determined to un-tangle. 


I’m so pleased that I decided to explore the real science behind our menopause weight gain. Because, for a generation of women who are told that we need endless supplements, medications, exhaustive exercise and diets to lose weight, what I learnt astounded me. 

Poor sleep, changing liver health over our life-time, nutrition and exercise advice that hasn’t been researched for women in mid-life and the fact that as we lose oestrogen and progesterone in our menopause transition, we also lose muscle tone and size too – all these factors impact on our thyroid and blood sugar hormones as well as our liver health, contributing to weight gain in menopause. It’s why, our menopause transition, which is the biological gateway to our ageing, leaves us vulnerable to other health changes in mid-life. 

If you are putting on weight that you are struggling to manage, then please have a read, because I want to share with you my five reasons your body shape changes and you put on weight in menopause. 
  1. NOT SLEEPING – Incredibly, because of our changing hormone levels in menopause, we can add 1-2 kg a week during menopause when we can’t sleep, with much of this going on our belly and under our diaphragm.  So forget the gym, a good night’s sleep is the answer to your menopause weight loss. But that’s easier said than done when you’re suffering from increased cortisol, hot flushes, restless legs and joint pain. Being awake night after night means that a hormone called insulin remains higher than usual overnight, which interferes with the production of your sleep hormone called ‘melatonin‘.

    As sleep deprivation accumulates, it can increase the risk of heart problems, anxiety and depression; resulting in even more sleepless nights. 

  2. OESTROGEN DOMINANCE – When menopause hormonal changes arrive and women don’t adjust their lifestyle to suit these changes,  our fat cells turn towards storing excess oestrogen that arrives from our diet and hormone-agents in the environment. When this happens, the role of progesterone changes too and this can cause insulin and another stress hormone called cortisol to get out of balance too. It’s why liver health is important to us as we age. We clear excess oestrogens via our liver and during menopause, our liver changes in structure and function too. 

3. MUSCLE LOSS –  When we begin to lose muscle, our metabolism drops off. Skeletal muscle has the most effect on our metabolism. Muscle loss is highest for women during menopause and when we lose muscle we don’t ‘burn’ as many calories as we used to either. This muscle loss is normal and is a condition called sarcopenia. The effect of this is that we lose mitochondrial cells which are the location for fat-burning and energy production in our body. But there is more to the menopause weight loss story too – and it’s about our sleep, changing liver function and our sore joints and muscles which can increase a stress hormone called cortisol and this leads to more inflammation in our body. Increased fat storage is another sign of a body that is inflamed.

4. LOW VITAMIN D LEVELS Low oestrogen levels may cause low Vitamin D levels, which increases fat storage.  Our skin is our largest organ and is full of oestrogen receptors. Vitamin D is a fat-soluble vitamin and is produced in the skin with the help of oestrogen. Therefore, many women are at risk of low vitamin D levels and because Vitamin D is now recognised as a hormone, low levels have an effect on other hormones in the body too. This is due to the feedback system that operates with all of our hormones. 

When Vitamin D is low, hot flushes are increased and memory loss/ foggy brain becomes worse. We also experience more muscle soreness because Vitamin D is involved in the production of calcium and our bones and muscles require calcium to help them to remain strong. Vitamin D is such a powerful hormone for women to monitor in menopause because it is also implicated in melatonin production. This is our sleep hormone, and when Vitamin D levels are low, our insomnia increases and our mood hormone, serotonin, is reduced. Serotonin works with dopamine to help our mood and motivation. So, if you are on menopause-related anti-depressants, then ask your Doctor to also check your Vitamin D levels too.  Restoring Vitamin D and sleep is crucial to your ongoing health and weight. 

5.  HIGH STRESS LEVELS – My number 5 reason, is for you not to forget that even though you still ‘feel young’, your internal cells, tissues and organs are ageing. This means that our body doesn’t resist stress as well as it used to, so blood pressure, heart rate and temperature go up more readily when we are feeling stressed and overwhelmed as we continue our busy lives. Some stress is good for us, but the problem in our menopause transition is that too much stress (and this includes from not sleeping and/ or too much exercise) increases cortisol levels. This powerful hormone is one of your stress hormones but it works in conjunction with melatonin, your sleep hormone. Too much stress (emotionally and physically) interferes with your sleep. When you don’t sleep, your insulin levels stay high and you resist overnight fat-burning. It’s a vicious cycle as so many women find.

The combination of ALL of these changes in our body during menopause is important. Not sleeping, changing liver health, loss of elasticity in our blood vessels, muscle loss, sore joints and even stress from our busy lives, all interact to create the ‘perfect storm’ for weight gain during our menopause transition and of course, our health starts to change as well. 


When we don’t get on top of turning around these changes with our lifestyle, then the weight creeps on and stays. Exercise may not help to shift it either. Millions of women then head towards changing heart health as they move into post-menopause.  But we mustn’t ignore it. Because if we don’t stop the menopause weight gain mayhem, then we already know from our mother’s generation, that weight gain around the trunk at this time of life sends women into post-menopause heart disease, obesity and Type 2 diabetes. 

For a generation of women who have enjoyed good health all their life, it can be a confusing time. And this is why I’m passionate about you all understanding that turning around your weight gain and changing health as you transition menopause matters to your health as you age.  If you are struggling, then please join me on the 12 week online menopause weight loss programme that is scientifically evidenced for you in menopause.

This powerful programme teaches you how to use lifestyle change that allows you to lose weight and age healthily. It puts menopause into ‘wellness’ not ‘sickness’. It’s called ‘Transform Me’ because that’s what it did for me, when my research on women’s healthy ageing helped me shift 15kg, improve my cholesterol and reduce hot flushes, restless legs and sore joints. My story is HERE …


Wendy Sweet, PhD/ Women’s Healthy Ageing Researcher & MyMT Creator & Coach/ Member: Australasian Society of Lifestyle Medicine/ NZ REPS Registered Exercise Specialist


  • Edwards, B. & Jin Li, [2013]. Endocrinology of menopause. Periodontology, 61, 177–194.
  • Ford, C. et al. [2017]. Evaluation of diet pattern and weight gain in postmenopausal women enrolled in the Women’s Health Initiative Observational Study. British Journal of Nutrition, 117, 1189–1197.
  • Harvard Health, [2018]. Lose weight and keep it off. Harvard Health Online Publications. Boston: MA
  • Kendall, B. & Ester, R. [2002]. Exercise-induced muscle damage and the potential protective role of estrogen. Sports Med., 32 (2), 103-123
  • Lerchbaum, E. [2014]. Vitamin D and Menopause: A review. Maturitas, 79, 3-7.
  • Moudi, A. [2018]. The relationship between health-promoting lifestyle and sleep quality in menopausal women. Biomedicine, 8(2), 34-40.
  • Rizzi, M. [2016]. Sleep disorders in fibromyalgia syndrome. J. of Pain & Relief, 5:2.
  • Ryan, M. Itsiopoulos, C. et al. (2014). The Mediterranean diet improves hepatic steatosis and insulin sensitivity in individuals with non-alcoholic fatty liver disease. Journal of Hepatology, 59(1), 138-143.
  • Santosa, S. & Jensen, M. (2013). Adipocyte fatty acid storage factors enhance subcutaneous fat storage in postmenopausal women. Diabetes, 62,3, 775-782, ProQuest Central.
“If you have ever wondered if there was a clear easy plan to follow to sleep all night, reduce hot flushes and prevent or reduce your weight gain during menopause, then ‘welcome’ – you’re in the right place now.”

Discover how either of my two Menopause Transformation programmes might help you too or take my Symptoms Quiz below… 

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