In case you haven’t noticed, winter is in full force here in middle Tennessee (yes, that thermometer does have a single digit on it—brrr!). The chilly air and shorter days can really throw our bodies and minds for a loop. Some people experience lower energy levels, changes in appetite, and even depression. But these problems are more than just passing “winter blues.” In fact, there’s a clinical name for this group of symptoms: seasonal affective disorder.