If you’re in doubt about whether or not you should keep exercising when you’re unwell, use the ‘above vs. below the neck’ rule. While some mild to moderate exercise is generally okay while you’ve got ‘above the neck’ cold symptoms such as sneezing, a runny nose or a sore throat, it’s best not to do it at a gym where you might infect others. If you have ‘below the neck’ flu-like symptoms such as fever, chest congestion, cough, muscle aches or nausea, then you shouldn’t exercise at all until you have fully recovered.9 If you do choose to exercise when you’re feeling sick, try not to push yourself too hard. Tone down the exercise routines that you normally do or try out some light exercises that can be done from inside the house. Avoid working out in cold temperatures, as cold air can further irritate a sore throat or a cough. Be sure to stay hydrated by drinking plenty of water and liquids. If you start to feel unwell during a workout, listen to your body and stop exercising immediately. If you want to be absolutely sure about whether or not you should be working out in your condition, check to see if you should exercise or rest based on your symptoms.