I had my doctor's appointment this morning. Unfortunately, the allergen tests were all negative, i. e. I don't know what's causing it.The allergen test tells you a lot. I am allergic to house dust, pollen etc.
But the inhaler really does help, I was able to train without any issues. On the first day I was a bit careful, I selected a 45-minute long (short) version of a 30-30 workout that only went to 120 %. Since I am on a dumb trainer, I pushed the envelope until 140 % without any issue and room to spare. So I continued my training plan and things are working out for now. My heart rate was perfectly normal and my RPE was only slightly elevated. (My chest feels a bit “weighted” if that makes sense.)