Hormonal changes, muscle mass, metabolism, and activity levels all influence how the body stores fat and utilizes energy. On average, women over 40 may experience a weight gain of about 0.4-0.9 kg annually, a result of multiple physiological shifts. Several factors contribute to weight gain in women after age 50.

Hormonal changes during menopause

The average age for menopause is 52, yet perimenopause can begin earlier. During this phase, estrogen, a reproductive hormone, declines, which often increases appetite and contributes to fat accumulation around the abdomen. Common symptoms include: hot flashes, disrupted sleep, and vaginal dryness.

Health conditions and medications

Certain health conditions and treatments can impact weight. For instance, depression often leads to emotional eating and reduced physical activity. Additionally, some antidepressants or blood pressure medications can increase appetite and affect metabolism.

Certain medications can influence metabolism. Photo: Anh Chi.

Metabolism slows with age

The body burns approximately 60-80% of its daily calories through resting metabolism. The remaining energy expenditure comes from physical activity and food digestion. As individuals age, their basal metabolic rate—the calories burned at rest—decreases. This makes middle-aged individuals, both men and women, more susceptible to weight gain and fat accumulation.

Muscle mass decline over time

After age 30, muscle mass typically decreases by 3-8% each 10 years. Muscle tissue is crucial for burning calories and fat. A reduction in muscle mass directly correlates with fewer calories burned at rest. Furthermore, lower estrogen levels after 50 promote fat storage, even when overall weight remains stable.

Lifestyle factors

Many women over 50 experience reduced physical activity due to joint pain, fatigue, or declining health. This decrease in activity leads to fewer calories expended and a greater propensity for weight gain.

Sleep disturbances, often linked to hot flashes and night sweats during menopause, also contribute to weight gain. Insufficient sleep can disrupt hormones that regulate hunger, leading to increased cravings for sweets and carbohydrates. Additionally, chronic stress elevates cortisol levels and inflammatory responses, further promoting fat accumulation.

To manage weight in middle age, women should aim to reduce their daily caloric intake by approximately 500-750 calories. Prioritize nutrient-dense foods such as: vegetables, fruits, whole grains, fatty fish, nuts, and lean proteins to help preserve muscle mass.

Limit processed foods and added sugars, avoid skipping meals, ensure adequate hydration, get sufficient sleep, and maintain about 30 minutes of daily exercise to support fat burning and prevent weight gain.

Anh Chi (According to Very Well Health)