The document discusses good posture and common postural deformities. It defines good posture as a balanced position that causes least fatigue. It then discusses advantages of good posture like comfort, health, appearance and efficiency. Common postural issues covered include kyphosis, lordosis, scoliosis, flat feet, knock knees and bow legs. For each issue, it defines the problem, causes, and exercises or precautions to correct it. Maintaining good posture through exercises and lifestyle is important for long term health and well-being.