Yoga can be defined as a mental connection achieved through remembrance. Wherever the mind is focused that can be called a yoga. It is a natural ability of the body to withdraw into itself in the face of external difficulties, which is used in meditation. 5000 years back yoga postures have been found in archeological sites in Indus valley. It is not related to any religion which is universal. The word yoga is derived from Sanskrit word. There are different types of yoga systems introduced in Hindu philosophy such as Raja yoga, karma yoga, Gnana yoga, Bhakthi yoga and Hatha yoga. Nowadays Hatha yoga is getting popular from outside India, which is nothing but asanas and exercises.