GET MOVING

4One of the best things for your immune system is to get up and move— every day, Khabbaza says. “Maintaining a good exercise regimen during the winter months is crucial for your mental health, it will prompt you to fill your body with healthier foods and it plays a role in helping you sleep better,” he says. “I also believe that anyone can exercise in the cold—you just have to have the right gear, the right layers and the motivation to get out there.”