Why would you think of sea salt as the relevant factor instead of the very well known positive effects on breathing and lung capacity caused by swimming?
Exercise also has played a significant role in my improvement. I am not discounting the impact it has. I just am baffled that they found that surfing benefits people with CF and their primary takeaway is that it must be beneficial to breath damp, salty air. There is a lot more going on when you surf than breathing damp, salty air. But that's the piece they turned into a medically prescribed treatment.
It’s not baffling.