 [ Symptoms ] should i go to the doctor  when i was young i went to the doc for asthma & i got an inhaler i am now 19 in optimal physical health going to the gym 56 days a week for 1 5 hours each & i have not used my inhaler since i was 15 or so and while my body is in shape enough to handle cardio i can not breathe after about 2 minutes of running so badly that i have to stop running bc my lungs feel like they are closing i do not know if this is a normal reaction to cardio or if it is my asthma coming back should i go to the doctor [ Disease ] yes you could have exercise induced bronchospasm   an asthma like reaction to exercise you will need to be properly examined