2-page guide · 5 min read
Midlife Metabolism Basics
Why the same habits stop working in perimenopause, and what to do instead.
By Julie Murphy, FNP-BC, PMHNP-BC, MSCP
Many women gain weight in their 40s without changing anything. Research following women through menopause shows that fat mass tends to rise and lean muscle tends to fall during the transition, with fat shifting toward the abdomen.
This is not a willpower problem. It is a physiology problem, and the solution is rarely eating less.
Why it happens
- Falling estrogen shifts where your body stores fat, moving it toward the midsection
- Insulin sensitivity tends to decline, so blood sugar swings more
- Muscle naturally declines with age, which lowers how much energy you burn
- Poor sleep increases hunger hormones and cravings
- Chronic stress keeps cortisol elevated
What helps
- Protein at every meal. Many experts suggest about 25 to 30 grams per meal to protect muscle.
- Strength training two to three times a week, gradually increasing the challenge
- A 10-minute walk after meals to help steady blood sugar
- Fiber from vegetables, legumes, and whole grains
- Less alcohol, and protecting sleep
- Avoid crash diets. They speed up muscle loss and make regain more likely.
Medical support
Hormone therapy does not cause weight gain, and some research suggests it may reduce the shift of fat toward the abdomen. For some women, weight-loss medications such as GLP-1s are an appropriate option, ideally paired with strength training and protein to preserve muscle.
Questions to ask your clinician
- What are my A1c, lipid, and thyroid results?
- How can I preserve muscle as I get older?
- Am I a candidate for hormone therapy or weight-loss medication?
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