Shortness of breath

The excuse that unathletic people use when they get tired of running

*Chalmers is panting and stops running laps during his workout*
Gavin: Yo Chalmers are you ok?
Chalmers: Yeah I just got some shortness of breath
Gavin: Do you have asthma or something?
Charmers: no I just have shortness of breath

short of breath

Lungs don’t have enough oxygen struggle to breath

I’m having trouble breathing I feel short of breath