Im 17 years old and when im running when i already reached 500m im feel like getting tired already and i had a shortness of breath so ill rest first?

Mgt: I would advise seeing your PCP for an evaluation. They can listen to your lungs after going up and down flights of stairs. If you have bronchospasm, then an inhaler may be prescribed. There are many conditions which may lead to your symptoms, and a further evaluation is indicated. You may also upload your medical details for an inbox consult.