This document provides information about yoga for a physical education class. It defines yoga and discusses its importance for physical, mental, and spiritual health. It outlines the elements of yoga including asanas (postures), pranayama (breathing exercises), and the eight limbs of yoga according to Patanjali. The document also briefly discusses the history of yoga and its physiological benefits for preventing and managing common lifestyle diseases like obesity, diabetes, hypertension, back pain, and asthma.