What would the pyramids in Giza look like if they weren't precisely constructed? Would they even exist today?
Would any building in San Francisco withstand even a moderate earthquake if it wasn't precisely constructed to exact designs?
Why then - do people let their "body structures" fall about it random patterns? We see this all the time in yoga class. We ask you to put your feet together yet they are a several inches apart and stuck outward like a duck!
When the body is structurally intact - and in a biomechanical balance - you feel better. You feel better because there is no longer a struggle with gravity. You're not "pulled down by the weight of the world" ...so to speak.
Balance, integration, freedom of movement, lightness, integrity and stamina are all a result of precise alignment in the body.
Practicing yoga will help you "straighten up" in more ways than one!