ABSTRACT
Writing a book is hard work, very time consuming and we do not have a lot in the way of free time. Hence, when offered the opportunity to produce a second edition of this textbook by the publishing team, our motivation levels were not especially high. However, as you’ll know, or will soon know upon reading this text, motivation (such as intentions) does not always translate into behavior: we do not always do what we are motivated (or intend) to do. In our case, our motivation to not update the book led to us actually updating the book. So, what changed? In short, the field; the field of health behavior changed since the publication of our original text in 2017.
