You've had to have heard at least one of these before and in my case, I believed more than a few of these! This winter, let's be a smarter and healthier group with these busted winter myths :) - Cold air can make you sick Lower temperatures alone won't make you sick! In fact, the exact opposite is true. "Cells that fight infection in body actually increase if you go out into the cold," says Rachel C. Vreeman, MD. - You shouldn't exercise in the cold Not true! In cold temperatures, race times are actually faster. Plus, those faster workouts can spike your endorphin levels—which actually already increase just by you being outside :) - Allergies go away in the winter They might be worse in different seasons, but they never actually go away. According to the Asthma and Allergy Foundation of America, one in five people suffer from indoor/outdoor allergies, and the indoor ones can actually be worse in the winter. Pets don't spend as much time outdoors and closed windows seal in poor air quality. - You don't need sunscreen in the winter Just like on overcast days, keep using that sunscreen! Keep in mind that snow and ice can both reflect up to 80% of harmful UV rays so that they can hit the skin twice! - You lose most of your body heat through your head You lose heat equally through any part of your body that is exposed. If you're bundled up but don't have gloves, the heat will escape through your hands! Simple as that! - Lack of sunlight causes winter depression While dark days don't help, there are many other factors besides seasonal affective disorder that can contribute to winter depression. Busy schedules, family stress, and worries about holiday spending are more likely to trigger the blues than true SAD, which affects just 5% of Americans.