exactly what I've heard, they only seem to work well if you keep the training up. I'm also an asthma sufferer (peak flow of around 550-600) which is why I'm interested....Trinity said:I think the idea of them is to give the diaphragm and other breathing muscles a work out...as you would work out other muscles in the gym for instance.
But I get the feeling from hearing what people have said about them that you have to be really disciplined...just like having a set of weights at home and not using them (of which I am guilty :embarrassed: )
eeeeewwwwwww not a pleasant thought!!Trinity said:mind you, you could probably pick one up on ebay much cheaper. I just don't like the thought of buying a 'used' one :/