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Aron
Lv 5
Aron asked in SportsRunning · 5 years ago

what is that mask called that you wear when you are running to make it harder to breathe?

it makes it harder to breathe so that when you take it off you can run for what seems like forever without getting tired.

1 Answer

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  • 5 years ago

    these are altitude masks that supposedly make your body think it is at high altitude, they do not work so don't buy one.

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