Back in mid-March just pre lockdown I'm pretty sure I had COVID-19 / coronavirus, as someone in my small office tested positive a few weeks previously. I was ill with the usual symptons for about 5 days but particularly bad breathlessness, deep lung pain, basically feeling like I was at 4,000m altitude the whole time and someone has plonked an elephant on my chest. I was running right up until I had the lurgy but wondering why I felt so knackered running my short commute when I'd done a half marathon fine 2 weeks before. 6 weeks on post recovery, I am able to go out for ca. 5km runs every 2 days with my kids, pushing the running buggy and plenty of nature/train spotting stops. However, when I attempt anything that nears proper exertion e.g. a nice 10k non-stop outing on my own or a 10 min sharp spint on the treadmill, later I can feel all the COVID lung symptons rearing their ugly head again, especially at night (and have not gone away yet). I am wondering if anyone else who has had COVID-19 symptons like mine has experienced similar lung pain weeks later during more strenuous activity. Is this normal e.g. if compared to exertion after say, pneumonia, and how long will I need to wait to get back to 'proper' cardio training? I'm missing my running endorphins from a good workout!