The last time I checked, sticking out your tongue and rolling your eyes were great ways to call negative attention to yourself, not improve your appearance. But some New Yorkers have taken up the exercise -- a pose called "The Lion" -- in a new New York yoga class called facial yoga.

Just like a conventional yoga class, facial yoga attempts to tone and strengthen the muscles of the face through specific exercises. Instructors believe that the old principle "if you don't use it, you lose it" applies to facial muscles as well, and that by doing facial yoga you can prevent and reverse signs of aging.

So if you're looking for a Botox-free way to get firmer skin and fuller lips, face yoga just might be for you. Interested in learning more? Here's an interesting article that includes a few of the more popular poses.

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