The wholesome image of yoga took a hit in the past few weeks as a rising star of the discipline came tumbling back to earth. After accusations of sexual impropriety with female students, John Friend, the founder of Anusara, one of the world’s fastest-growing styles, told followers that he was stepping down for an indefinite period of “self-reflection, therapy and personal retreat.”

Mr. Friend preached a gospel of gentle poses mixed with openness aimed at fostering love and happiness. But Elena Brower, a former confidante, has said that insiders knew of his “penchant for women” and his love of “partying and fun.”

Few had any idea about his sexual indiscretions, she added. The apparent hypocrisy has upset many followers.

“Those folks are devastated,” Ms. Brower wrote in The Huffington Post. “They’re understandably disappointed to hear that he cheated on his girlfriends repeatedly” and “lied to so many.”