I've had that sometimes during the cold seasons, and usually take a puff of salbutamol before setting out. I still get it sometimes after a hard run or a race.

I've had that sometimes during the cold seasons, and usually take a puff of salbutamol before setting out. I still get it sometimes after a hard run or a race. Maybe try reducing the dose of running (duration x intensity), until you don't suffer so much, and then slowly build up if you can over weeks. You can walk & run, couch-to-5K style, if it helps. This little-by-little approach applies to most things in running - from training your VO2max to coming back from an injury, so it may help you. The key is to understand that the timeframe of adaptations can be weeks to months, and not to rush things.