Training in high altitude increases your lung strength and capacity but not all of us live in the rockies. Well this little device helps with lung strength and capacity, just put it in your mouth like a snorkel and breath. To exercise, simply set the breathing resistance level with the adjustable valve, and then inhale, hold and exhale through the comfortable silicone mouthpiece. easy simple and cheap, yes cheap, $24.95 and a 30 day money back guarantee. Don't be fooled by the site, the product is what you are really after.
Expand-a-Lung
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