Upon a bit of research tonight after having a run home from work and failing miserably i believe i may have exercise induced asthma on the basis that for example if i am in the gym i can do cardio for ages, much harder than a mile or so run home. But because it was outside I ended up being out of breath within a minute or so with my chest feeling really tight. Apparently its caused by the cold air hitting your lungs causing asthma when outside and hyperventilating due to running. This is just me being curious at the moment. I will go get it checked out asap. As to whether this affects my joining as the army website says : Chest Disorders * Asthma, wheeze or Asthma symptoms (and treatment) during the previous 4 years. As a recruitment no-go.. Any had any experience of this?