Power Breathe - snake oil or worth a try?

Just seen this :
http://www.powerbreathe.com/select-mode ... t-fitness-
cycling.html
Any merit to it? I'm a regular cyclist but anytime I've had a doctor measure my lung capacity(?) with the thing you breathe into very hard they've been surprised I can't get it higher.
http://www.powerbreathe.com/select-mode ... t-fitness-
cycling.html
Any merit to it? I'm a regular cyclist but anytime I've had a doctor measure my lung capacity(?) with the thing you breathe into very hard they've been surprised I can't get it higher.
http://www.strathspey.co.uk - Quality Binoculars at a Sensible Price.
Specialized Roubaix SL3 Expert 2012, Cannondale CAAD5,
Marin Mount Vision (1997), Edinburgh Country tourer, 3 cats!
Specialized Roubaix SL3 Expert 2012, Cannondale CAAD5,
Marin Mount Vision (1997), Edinburgh Country tourer, 3 cats!
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You have had a peak flow test, having asthma I am very familiar with them, they even gave me one for home so I could monitor myself. What numbers you getting on them?
I do have one but I need to get back into using it.