Despite the colossal popularity of yoga pants and gym memberships, that does indeed sound wrong, especially considering that "the global fitness and health club industry generates more than 75 billion U.S. dollars in revenue according to the 2013 IHRSA Global Report"[0]. Yoga related activities should be a subset of the fitness and health club industry, right?
[0] http://www.statista.com/topics/1141/health-und-fitness-clubs...