Dahn Yoga teaches that its physical exercises “can restore the vibrations of the body and brain to their original, healthy frequencies,” according to a video introduction on its Web site.

But Dahn Yoga is now defending itself from allegations by former employees that it is “a totalistic, high-demand cult group” that demands large sums of money from its followers and enshrines Lee as an “absolute spiritual and temporal leader.”

Thousands of New York city public-school students and teachers are participating in a “Brain Education” program run by a group with ties to an alleged cult.

Dozens of former employees of an organization called Dahn Yoga said the school program is run by a group that is part of a vast web of interrelated companies conning participants into investing all their time and money in unproven health and healing activities.

Dahn Yoga claims it can ease your stress, even heal your ailments.

But a lawsuit filed on behalf of 26 former Dahn members alleges the organization subjects its members to “psychological manipulation�.

Experts say this organization fits the definition of a cult, adding that the accusations made in the 53-page lawsuit are not new.

With more than 130 centers across the country, Dahn Yoga claims to promote health and empowerment. But experts said that beneath the calm lies a cult.

A Korean national whom some have called the new Rev. Moon is connected to a group that has purchased the Fallsview Hotel.

(CBS) CHICAGO -- Dahn Hak is a controversial and expensive exercise program sold at centers all over the world, including Chicago.

For 21 days, Seung Heun Lee lived on a mountain with no food, water or sleep, he writes in his book "Healing Society."

Adherents of Dahn Yoga praise its approach to body and mind. But others say they were pressured about money and commitment.

A hybrid form of Korean yoga has really caught on in America over the past few years. It's called Dahn Hak, and while it's popular with tens of thousands of students, for many, it feels like a religious cult. Dozens of former Dahn students have alleged that brainwashing and mind control techniques are used, along with high-pressure sales tactics. And now, a program inspired by Dahn Hak has made it into our public schools.

(CBS 5 NEWS) – 5i Team Reporter Morgan Loew investigates an international organization based in Arizona. Its followers believe it has made them happy and healthy. They'll even tell you it has cured them of illnesses, but critics warn this is a cult in disguise.

Investigation Uncovers A Lot More Than Healing And Peace

(CBS4) BOSTON The CBS4 I-Team investigates a group with hundreds of local members that promises healing and peace through yoga. The problem: some say the group is a high priced, dangerous cult.

Julia Siverls was hiking up Casner Mountain in the Arizona desert, hauling a backpack full of rocks and taking only occasional sips of water.

Ben Lucal of Brookline, Mass., joined Dahnhak in December after finding a flier on his doorstep advertising yoga. He started attending classes daily, but said he was pressured to get more involved.

Dahnhak has grown into a multimillion-dollar enterprise, claiming more than 200,000 members worldwide, including some 50,000 in the United States.