Yoga has literally thousands of poses, but a stretching expert says this one unwinds every muscle

Stretching expert and massage therapist Joe Yoon says cat-cow stretch leaves no muscle behind when it comes to mobility and flexibility.

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Photo: <a href="http://www.stocksy.com" target="_blank" rel="noopener noreferrer">Stocksy</a> /Javier Pardina

Adult Ballet is on the Rise—And Yes, You Should Totally Try it

Here's what to know before your first class.