Many women notice that maintaining their weight becomes more challenging during their 40s.
Even when eating habits and activity levels remain relatively unchanged, weight may increase and energy expenditure may feel different than it once did.
These changes are often closely linked to hormonal fluctuations that occur during perimenopause.
What Is Metabolism?
Metabolism refers to the processes the body uses to convert food into energy.
These processes support:
Metabolism is influenced by many factors, including age, muscle mass, activity levels, sleep quality, and hormones.
The Role of Estrogen
Estrogen affects how the body stores and uses energy.
As estrogen levels fluctuate during perimenopause, women may notice changes in:
Many women report increased weight around the abdomen during this stage of life.
Muscle Mass and Metabolism
Muscle tissue is metabolically active.
As women age, muscle mass naturally declines unless it is actively maintained through resistance training and physical activity.
This decline can influence overall energy expenditure and contribute to changes in body composition.
Sleep and Metabolic Health
Sleep quality often changes during perimenopause.
Poor sleep can influence:
Over time, sleep disruption may affect weight management efforts.
Looking Beyond Calories
Metabolism involves much more than simply calories consumed versus calories burned.
Hormones, sleep, stress, physical activity, and nutrition all influence how the body regulates energy.
A Broader Perspective
For women in Kitchener-Waterloo experiencing changes in metabolism during perimenopause, understanding the relationship between hormones and energy regulation can provide valuable insight into why weight management often feels different than it did in earlier decades.
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