I, like you probably, wondered what the heck this device did. Apparently it trains your lungs, allows them to fill with more air, work better, stronger, and faster, so essentially the Ironman PLUS is like a workout machine for your lungs.
There are three settings, light, medium, and heavy. Obviously you would probably want to start with the light level and work your way up. It is said to help with your breathing and even your breath-holding abilities.
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