Try an experiment with me.

Right where you're sitting, slump into your worst posture ever. Let your chest sink, shoulders rounded down, neck thrust forward like a chicken.

Some years ago I went on a trip to Nepal. I was with a group of dear yogi friends and most of the trip was scheduled with a full itinerary of tours and sights to see. It was a big trip for me and I was both excited and a little anxious.