B.K.S. Iyengar helped transform yoga in the United States by presenting it as a disciplined system of physical therapy and holistic wellbeing rather than an esoteric spiritual practice. Beginning with demonstrations in the 1950s, his precise, anatomically grounded method made yoga accessible to millions of Americans. By the 1990s, yoga had become a multibillion-dollar wellness industry, with tens of millions of Americans practicing regularly. Indian teachers fundamentally reshaped how the United States approaches fitness, rehabilitation, mindfulness, and preventive health.