Just to clarify… Periodization is a term applied to a model for designing micro-, meso- and macrocycles we all tend to follow in training, after having adopted it from weight training first introduced by Bompa (*1). And I don’t think people here are “making up words and presenting it as training concepts” - these terms are presented as means to describe training concepts that may be different from the the norm. Recently (*2) Joe Friel even presented an article wherein a number of examples of how to define periods was presented. Specificaly, he included: Linear (Classic) Periodization model, Reverse Linear Periodization model, Undulating Periodization model, Conjugate Sequence Periodization model, and Multi-Peak Periodization model, to name a few. These are not made up words, rather descriptors of the variations of a common concept (i.e., general periodization).
*1: Bompa, Tudor, “*Periodization: Theory and Methodology of Training, Fourth Edition,” *Human Kinetics, 1999.
*2: Friel, Joe, "Periodization Part 3: The Design Phase and The Macrocycle," Performance Cycling Conditioning, Vol 13, No 7, 2008.
Well as coachct mentioned, while Bompa made the concept of periodization available the 1st theory about it came from Matveyev. Tschiene and Verhoshansky expanded on the concept and the work/ideas of them most resembles of periodization today as understood in physiology.
Anyway, my comment about coaches making up or misusing training concepts wasn’t directed at anyone in particular, but as I have gained experience and educated myself I have come to realize this happens more often than not and in some cases it is not the coach’s fault. In particular when considering the quality of some of the certifications available (i.e USAT) you can get great or shaky content/information depending who is presenting hence it can be expected.
I think Friel is a great coach and we should certainly thank him to been the pioneer but some of the information presented on his book is just simple incorrect. Coined terms such as AeT or muscular endurance or the misuse of the critical power model are just some examples. The fact that many beginners or developing coaches (like me) used his “bible” to learn certainly makes it easy for all of us to spread some of this misinformation. But for seasoned, experienced and educated coaches to continue to do so, I believe it is irresponsible and it makes a disservice to the coaching profession.
In the case of periodization as I said before; there is no reverse, non-linear, non-classic etc. because what he and others describe as such it is just periodization. Trying to use modified terms to describe something that already exists just causes confusion at best.
As coaches IMO it should be our responsibility to try to avoid this and we would make things easier for athletes if we could all use the same langue/terminology when referring to training concepts.