9 Things That Happen to Body Composition After Menopause

The average American woman reaches menopause at age 51, and the body composition changes that follow affect virtually every aspect of metabolic health. A study in the journal Menopause found that women gained an average of 1.5 pounds per year during the menopausal transition, with most of that gain shifting to the abdomen. But weight is only part of the story. Here are nine things that happen to your body composition after menopause, and what you can do about them.

1. Visceral Fat Increases Even Without Weight Gain

Estrogen helps direct fat storage to the hips and thighs. When estrogen declines, fat redistributes to the abdomen, specifically to visceral fat deposits around the organs. A study in the Journal of Clinical Endocrinology and Metabolism found that visceral fat increased by 44% during the menopausal transition, even in women whose total body weight remained stable. This redistribution matters because visceral fat is metabolically active, producing inflammatory compounds that increase cardiovascular and diabetes risk.

Why it matters for your metabolic age: Increased visceral fat drives up blood pressure and blood sugar, directly increasing your metabolic age even if the scale has not changed.

2. Muscle Mass Declines Faster Than Before

Estrogen has anabolic (muscle-building) properties. Its decline accelerates the rate of muscle loss. Research published in the Journal of Musculoskeletal and Neuronal Interactions found that women lost muscle mass twice as fast in the five years following menopause compared to the five years before. This accelerated muscle loss reduces metabolic rate, decreases physical function, and increases injury risk. The good news is that resistance training remains highly effective at counteracting this loss, even in postmenopausal women.

3. Bone Density Drops Significantly in the First Five Years

Women lose up to 20% of their bone density in the five to seven years following menopause, according to the National Osteoporosis Foundation. While bone density is not directly part of body composition in the traditional sense, it affects how safely you can exercise, your fracture risk, and your ability to maintain the active lifestyle that supports healthy body composition. Weight-bearing exercise, adequate calcium (1,200 mg/day), and vitamin D (800-1,000 IU/day) are the front-line defenses.

Why it matters for your metabolic age: Bone loss limits activity, which reduces muscle mass and increases fat storage, both of which raise metabolic age over time.

4. Insulin Sensitivity Decreases Measurably

Estrogen improves insulin sensitivity. As it declines, the body becomes less efficient at processing glucose. Research from the Women’s Health Initiative found that postmenopausal women had a 12% higher rate of type 2 diabetes compared to age-matched premenopausal women. Fasting blood sugar levels tend to rise during the menopausal transition, even in women with previously normal glucose metabolism. Increasing fiber intake, reducing refined carbohydrates, and maintaining regular physical activity are the most effective dietary strategies.

5. Total Body Water Decreases

Estrogen helps regulate fluid balance. After menopause, total body water decreases, which affects everything from joint lubrication to skin elasticity to how your body responds to exercise. Dehydration also makes blood pressure readings less stable and can produce artificially elevated blood sugar readings. Increasing water intake to at least eight glasses per day, and more during exercise or hot weather, becomes more important after menopause.

6. Metabolic Rate Drops by About 100-200 Calories Per Day

The combination of muscle loss, hormonal changes, and reduced activity levels means that postmenopausal women typically burn 100-200 fewer calories per day than they did before menopause. Over a year, that 200-calorie daily difference equals about 20 pounds of potential weight gain if eating patterns do not adjust. This does not require dramatic dietary restriction. Small adjustments, like slightly smaller portions, one fewer snack, or replacing calorie-dense foods with more vegetables, can close the gap.

Why it matters for your metabolic age: A metabolic rate drop drives gradual BMI increases that compound over years. Catching and addressing the trend early keeps your metabolic age from climbing.

7. Cholesterol Profiles Shift Toward Higher Risk

Estrogen helps maintain favorable cholesterol profiles. After menopause, LDL cholesterol typically increases by 10-15%, HDL cholesterol may decrease, and triglycerides often rise. These changes increase cardiovascular risk and reflect broader metabolic shifts. While cholesterol is not a direct input to Penlago’s metabolic age calculator, these changes typically co-occur with the blood pressure and blood sugar shifts that are.

8. Inflammatory Markers Increase

C-reactive protein, interleukin-6, and other inflammatory markers tend to rise after menopause. A study in the Journal of Women’s Health found that inflammatory markers increased by 20-30% during the menopausal transition. Chronic inflammation promotes insulin resistance, fat storage, and cardiovascular disease. Anti-inflammatory dietary patterns (rich in omega-3 fatty acids, colorful vegetables, and whole grains) and regular exercise are the most effective non-pharmaceutical interventions.

9. The Body Becomes More Responsive to Strength Training Than Cardio

Here is the good news. Research consistently shows that resistance training produces better body composition outcomes in postmenopausal women than aerobic exercise alone. A study in Medicine and Science in Sports and Exercise found that postmenopausal women who did resistance training three times per week gained 1.5 pounds of muscle and lost 3.5 pounds of fat over six months, while the cardio-only group showed minimal body composition changes. If you are postmenopausal and only doing cardio, you are leaving significant metabolic benefits on the table.

Why it matters for your metabolic age: Resistance training improves insulin sensitivity, reduces blood pressure, and improves body composition, hitting three of the four metabolic age inputs simultaneously.

See Where Menopause Has Left Your Metabolism

Menopause changes your body, but it does not have to change your metabolic future. Penlago’s free MetaAge calculator uses your blood pressure, blood sugar, BMI, and age to give you a metabolic age score in 60 seconds. It is the clearest picture of where you stand right now.

Find out your metabolic age in 60 seconds – free.