First thing we need to realize is that we lose muscle with age. Sarcopenia [age-related muscle loss] happens to men and women starting around 30-ish. As we lose muscle, our metabolisms slow down. So if we're eating approximately the same amount of calories in our 40s as we did in our 20s and 30s, or exercising less, we'll be slowing putting on weight.
There's an old saying in my field that goes, 'Muscles are made in the gym and abs (or flat abs) are made in the kitchen.' Ever heard that fat loss is 80% diet and 20% exercise? Brown says there's no scientific study to back up this ratio, but pretty much all professionals in the fitness and nutrition worlds agree on this.
Once estrogen levels start dropping in perimenopause for women, the playing field gets leveled, and we all start to store more fat around the belly. Add chronic stress to the mix, and long-term elevated cortisol will cause more fat to store around the belly.
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