Certain face masks claim to improve endurance performance by restricting how much air you can breathe in. But are they legit? Here’s what the experts and research say.
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Elevation Training Mask Do High Altitude Training Masks Work?
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ELEVATION TRAINING MASK THE PINNACLE OF BREATHING PERFORMANCE
ELEVATION TRAINING MASK THE PINNACLE OF BREATHING PERFORMANCE
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ELEVATION TRAINING MASK THE PINNACLE OF BREATHING PERFORMANCE