I don't know if it's normal or not, just wanted some other peoples input.
After high impact workouts, especially longer ones 3+ hours my lungs seem to get tight not painful but like it's hard to take a full deep breath. I'm assuming like other parts of your body you need to condition them? Not ever a problem during a sprint of olympic didtance even going full bore for the whole race.
I get the same thing. After very long hard training sessions tightness in the chest and difficulty taking deep breaths. It starts about 10 mins after and fades away after an hour or so. Never thought much of it, I just assumed it was normal.
I did a brick workout on Saturday.. 35 mile bike then a 7 mile run... I was feeling it in my chest for about 2 hours after.. If i took a deep breath it felt like i needed to cough.. I took a shower and nap and felt better when I woke up.. Same thing happened to me in highschool after 2-a-days for football..
I get that feeling during my winter training or if it is a little cold/damp outside. As stated above, it goes away when things slow down. If it gets worse our lasts more than a couple hours afterward then I would go see a doctor.