Yoga Asana traditionally means a 'sitting condition' or 'position' of the body, which contributes to the steadiness of the body and mind and a sense of well-being. In a nutshell, the yoga asanas can be defined as postural patterns. Asanas are also based on the natural postures of various animals, birds or even symbols like the tree, lotus, bow and plough, etc. Yoga asanas include various types of sitting, standing, stretching and inverted postures all aimed to improve flexibility, balance, strength and posture. These Yoga asanas target various muscle groups in the body. Some yoga asanas are highly ancient and have been mentioned in several ancient yoga texts.
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Author's Bio: 

Yoga Asanas are comfortable and peaceful postures that make the physical body ready for the higher and more spiritual levels of Yoga practice.