hings like upset stomach, chest congestion/coughing, or diarrhea), you should stop exercising until you feel better. So according to the information Google gave me, here's the answer to my question.
Can I exercise when I'm sick?
Head Cold = yes, but low intensity
Chest Cold/Bronchitis/Pneumonia = no
Flu = no
Also, think about where you're exercising. If you're contagious, you should probably stay away from the gym.