Moderate exercise is generally safe with a common cold, but listen to your body. If symptoms are above the neck (e.g., runny nose, sore throat), light exercise may be okay. However, if symptoms are below the neck (e.g., chest congestion, body aches), it's wise to rest and recover. Intense workouts can strain your immune system. Stay hydrated, get adequate rest, and consider consulting a healthcare professional if symptoms persist or worsen.