Remember that physical culture and weightlifting became popular during the Victorian Age in the United States. In this day, even the most powerful of strongmen such as Eugene Sandow [who didn’t have a problem with all of those figleaf poses] had proper manners. It was considered proper to wish good morning to a lady by bowing to her and tipping your hat [yes, the men always wore hats in that day]. That proper bowing motion is what became the model for the good morning exercise. A little bit of trivia but one I wanted to answer.