yogasana or asana

yogasana is a part of the yoga usually understood to be yoga itself by and large. 

this ang of the ashtang is based on the premises that the self can direct self only with a healthy and controlled body. 

the practices of the yogasana are the observations for the body to keep in complete control of the self (not only the mind, but the complete existence in which the body is also a part). 

the asana can be practiced in two or three ways. 

1. the asana can be treated as various different postures like exercises. 
2. they can be practiced as observation of the complete self in a particular posture with pranayam . 
3. they can be practiced as observation of the complete self with the universe. 

in the third method 

• the first stage is to observe self.
• second is to observe others from the self.
• third is to observe universe from the self.
• forth is to observe universe through the self.
• fifth  dissolves the self and only universe remains. that is the stage of samadhi..