4. Wait a day
So your flu/cold/illness is gone and you’re feeling a thousand percent better. Awesome. But don’t go for a run just yet. Wait a day. According to running experts, it’s better to wait until the day after your symptoms are gone to go for a run. If you don’t give yourself 24 hours for your body to readjust to feeling normal again, you could end up back in bed. Better to play it safe than sorry, no?