Cold days are coming! Winter weather can exacerbate existing conditions like asthma, arthritis and chronic migraines, just to name a few. But just because the trees are bare and there's a chill in the air doesn't mean you have to forgo your daily walks outside for the dreaded treadmill. It's important to get outside on sunny days, even when it's cold. Here are some tips to help keep you moving during the cold winter season.