On average, women gain about 2.4kg (around 5lbs) and 2.9cm (around an inch) on the waist between the ages of 44 and 50. This is because a perimenopause starts to kick in, oestrogen levels start to fall and fat is redistributed from the hips and thighs to the tummy.
Falling oestrogen levels mean our bodies start to lose muscle in our fifties, and our stomachs develop a 'doughy' appearance. Broken nights caused by hot flushes and night sweats don't help. A 2013 study shows that sleeping less than seven hours a night can add up to 3.4cm (1.3in) to your waist. This is because missing out on sleep can disrupt leptin - the hormone that switches off hunger.
Annoyingly, you may notice your tum appears to stick out more around this age. Why? Decreasing bone density can lead to small but gradual loss of height, so we have less body length to accommodate our tummies.
The good news is by following our simple lifestyle changes for how to get a flat stomach you can fight the flab and reduce the health risks it poses. It's never too late to get that flat tum. Try it for yourself with our 17 tips and tricks for how to get a flat stomach that work at any age...
Fast Diet creator, Mimi Spencer is back with a new six-week plan just in time for summer...
The easy lunch hour tricks that will help you lose belly fat once and for all.