Welcome to the Get Fit Guys quick and dirty tips to get moving and shape up. My name is Brock

Armstrong and I'm the Get Fit Guy. These days, most of us are wearing masks, at least in public places,

but do training masks and even those personal protection masks have any fitness benefits?

Well, today we're going to look at what science has to say about restricted breathing and exercise.

You've probably seen those sleek and slightly intimidating, tight-fitting masks that are worn by UFC fighters and celebrity actors like Michael B. Jordan, at least in the

movie Creed, and maybe even some extreme workout enthusiasts at your local gym, who appear to be

the exercising equivalent of the villain Bain from Batman's The Dark Night Rises.

Well, from the looks of NFL players, Iron Man

Triathletes, BJJ, champions, MMA fighters, boxers, crossfitters, and beyond, these masks,

which come in a variety of colors, shapes, and sizes, are staying trendy longer than I anticipated. I got a mask back in 2013,

and then a device called a power lung shortly after that. I fully expected them to

disappear within a year, and not because they lacked science or had been proven ineffective,

but mainly because they looked silly and they felt

terrible to use. I mean, exercise is hard enough without being smothered while you do it.

Training masks are just a fad, right? Well, maybe not.

Now before we get into the science, let's look at the difference between resisted breathing,

restricted breathing, and hypoxia.

Let's start with resisted breathing.

And let's do an experiment.

First, put your fist up to your mouth like you're pretending your hand is a trumpet or something.

Now breathe in and out through the tiny space between your fingers and your

palm. That is resisted breathing. You can think of it as weight training for your lungs. Now let's look at

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