Hey there, so I went for a short run yesterday which was the first one for 6 months. After like 4km I got this pain right below my ribs. My initial thought was that my diaphragm but I wasn't sure what could have caused it. Could have been the cold temperature (was running in shorts and t-shirt when there was 10°C outside) or maybe that my diaphragm isn't used to such a long time of heave breathing anymore. The rest of the distance I was breathing rather flat instead of really deep. So any of you guys experienced something similar or has some suggestions what caused this pain? Thanks.