More info on cultivating an aligned back. From the NYTimes.
"The Claim: Sitting Up Straight is Best for Your Back"
By ANAHAD O’CONNOR
"Thirty years ago, scientists first showed this [that sitting up straight was bad for your back] by inserting needles into the backs of volunteers and measuring the amount of pressure created by various seating positions. They found that a reclining position was ideal, placing the least strain on the back and minimizing pressure that could lead to back problems. Since then, multiple studies have confirmed that finding."
Read the whole thing here.