The science
Estrogen doesn't just leave. It moves your fat.
As estrogen declines through perimenopause and beyond, your body shifts where it stores fat — away from hips and thighs, and deep into the abdomen. At the same time insulin sensitivity tends to fall, cortisol has more room to do damage, and muscle mass quietly declines year on year.
That's why the old approach stopped working. That's why the weight landed at your waist. That's why "eat less, move more" left you tired and stuck.
This matters beyond how your clothes fit. Visceral fat — the deep kind, not the pinchable kind — is metabolically active tissue, and higher visceral fat is associated with greater long-term cardiometabolic risk. It's a reasonable thing to take seriously.
The workable news: muscle, cortisol, and cardiorespiratory fitness all respond to what you do. The same five habits that shift the weight are the ones that protect your metabolism for the decades after.