readikus, I grew up with asthma, from the age of 3 or 4 due to a bought of pneumonia, so I’ve had it all my life.
To make things worse I smoked from my late teens to my early 30’s as well. After university I moved to London to work, smoked, went out ‘on it’ at weekends (so 20+ fags on an all nighter, then weed, booze and more fags for the remainder). The one positive thing I did was commute to work by bike wearing a Respro mask. I rode the main roads from Tottenham to Oxford Circus 8/9 miles each way so they were plenty of exhaust fumes.
Within 6 months I stopped using my inhalers, still smoked etc but when I drew a breath I could feel my lungs filling with air (you know the good strong pulls you get after your inhaler kicks in). I’ve had stinking chest colds, pleurisy over the last 15 years, but never had to get a prescription for inhalers. I’m sure it’s down to riding with a mask and the extra work my lungs had to do to draw air in.
Apart from ride with a mask I did everything that would increase the use of preventative drugs. I lived in a huge dirty city, smoked, spent my weekends in night clubs/pubs and generally abused myself as much as my mates.
So I can’t vouch for powerbreathe but I know that restricting my airflow and making my lungs work harder certainly helped me. They just seem like they could work, the same as wearing a mask did for me.
But as you’ve said everyone is different, so what worked for one may not for another.