it’s a habit. It’s a program in your brain about how you organize yourself in relation to gravity. And all your muscles, joints and connective tissue have gone to the office manager and asked for a new job.

Many of the muscles on the back of the body which are designed to extend the spine and draw the shoulder blades into their optimal position on the back of the rib cage have become overworked and are just hanging on. Conversely, the muscles on the front of the chest that are designed to provide pushing power have now been assigned to help the overworked guys on the back to keep the whole structure from toppling forward.