Anyone tried one of these?
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Altitude training mask
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that mask is for cardio only and you wear that bitch and you will freak out. they have a new style training mask 2 its suposed to be better but Bas rutten has one where its like a mouth piece not a bag over your head.
again good for cardio only. if you need that you better have some nick diaz type cardio to begin with for it to really help
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