Laurent Potdevin, the chief executive of Lululemon Athletica, the company famous for its leggings and role in the creation of the athleisure trend, resigned because of behavior that fell short of the athletic apparel maker’s standards of conduct, the company said on Monday.

Mr. Potdevin, who was president of Toms Shoes and chief executive of Burton Snowboards before joining Lululemon in early 2014, also stepped down from the board. The company, based in Vancouver, British Columbia, has begun looking for his replacement.

The company said Mr. Potdevin, 50, had failed to “exemplify the highest levels of integrity and respect for one another,” but declined to give specific examples.

Glenn Murphy, the company’s executive chairman, thanked Mr. Potdevin for “his work strengthening the company and positioning it for the future.” Mr. Murphy, a former chief executive and chairman of Gap, will take on extra duties.