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Why do women's upper arms get bigger with age? Understanding hormonal and metabolic changes

By age 30, both men and women begin to lose muscle mass, a process that accelerates significantly as we get older. For many women, this often coincides with a noticeable increase in the size of their upper arms, a phenomenon that has biological roots. So, why do women's upper arms get bigger with age? The answer lies in a combination of shifting hormones, a slowing metabolism, and changes in body composition that are a natural part of the aging process.