A lot of advice I see from people here is to go outside and just start running, now I'm not out of shape or at least I like to think I'm not, I go to the gym 3-4 times a week and work out for 30 minutes (I jog fine on the treadmill), and walk every night. I just went for a quick run around my block which is usually a 15 minute or so walk -- I come back and I'm coughing my lungs out, and I feel a burning in my throat while running. Is there anything I can do to fix this? Or do I simply push through it?