(Trent Nelson | The Salt Lake Tribune) Scott Moore teaches a yoga class at Alianza Academy in South Salt Lake on Wednesday, May 29, 2013.

Yoga is on the rise and theres no stopping it.

Studios offering classes in what one practitioner called its "pretzel-y twists" are popping up faster than sushi bars and Thai restaurants. Millions of Americans swear to its physical and emotional benefits, while selling yoga gear especially pants and mats is a billion-dollar business.

Yoga Rave

The Krishna Temple will hold a yoga festival featuring more than 75 classes, seminars, workshops and music.

When Friday, June 7, 8 p.m.

Where Sri Sri Radha Krishna Temple, 965 E. 3370 South

Now, meditate and ruminate on this: Is the popular practice a religion?

The National Center for Law & Policy, which specializes in religious-freedom cases, says it is, and is suing a Southern California school district on behalf of parents for teaching yoga, arguing that it violates the separation of church and state.

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The yoga question: Is it a religion?