Does having a cold affect endurance while running?

Answer 1

depending on the symptoms yes if you have a headache from the cold it would effect your performance or being tired from a resless night because of your cold yo would definitely not perfor at 100%

Answer 2

Yes because when you are sick you don't have the energy that you would usually have. A lot of your body's energy is being used to fight off the bacteria/germs that are causing the cold.