I think, for a novice, they need to just begin engaging in some sort of physical activity they enjoy. If someone were to tell them that they were about to engage in “a complex behavior that involves many steps and a series of skills to adopt and maintain,” they would never begin. I also think there is a natural evolution of an activity. It may start out simple, but as a person adapts and his/her confidence and stamina grows, he/she will be more willing to increase his/her skill and accept a more complex routine. Physical activity can BECOME complex, but it does not necessarily have to be that way. I believe there are stages and the exerciser ultimately makes the choice.