Something is shifting. Maybe you have noticed it in the way your energy dips a little faster than it used to, or in the way your body feels less predictable than before. You are not imagining it. The hormonal changes happening during perimenopause and menopause affect almost every system in your body, including your bones, your muscles, and yes, even your mood. And here is the thing that often gets overlooked in all the noise about symptoms: movement is medicine.