Athletes claim these creepy masks boost their workouts

Training masks have been gaining popularity among athletes for a few years now. The Oakland Raiders’ Marshawn Lynch started cinching one on in 2015, while the Jets’ Brandon Copeland has been incorporating them into his training routines over the past couple months. Gym rats are now catching on.

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PERFORMANCE-BOOSTING TRAINING MASK - This athlete workout mask effectively improves workout results by simulating altitude training via the flux-valve

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People are wearing this weird mask to get a better workout

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Come on, professional sports players. Mask up consistently. - Poynter