Naked yoga (Sanskrit nagna yoga or vivastra yoga) is the practice of yoga without clothes. It has existed since ancient times as a spiritual practice, and is mentioned in the 7th-10th century Bhagavata Purana and by the Ancient Greek geographer Strabo.
Early advocates of naked yoga in modern times include the gymnosophists such as Blanche de Vries, and the actress and dancer Marguerite Agniel.
In the 21st century, the practice is gaining popularity, notably in western societies that have more familiarity with social nudity.