Arturo - I am interested in the science behind it. Perhaps how it works or how it stresses the muscles in a way that produces superior gains or allows for better recovery between sets. I am trying to shy away from doing somthing because that is what I was told to do. Also, and no offense Vik, I want to stray way from the thinking that well this country or that lifter did it this way and had great success. As we all know there are so many factors involved in why someone may have had superior results with a certain training method (for example if a country was doping or if a lifter was a genetic freak, etc.) With regards to weightlifting (which I love this sport to death) but it seems I am constantly running into anecdotal evidence as the basis for training methods instead of actual science or explaination of why or how a method works.ADDITION: Thinking on it, perhaps why I cannot find much is that there are many roads to the same solution. Variability between lifters and lifters lives may be the limiting factor. If there was 1 superior method wouldn't all be doing it and having a large amount of success?
Wave loading sets is something that is espoused by Coach Angel Spassov. The theory behind it is that when you lift a heavy weight, your fast-twitch muscle fibers are "awakened" and will therefore be recruited more easily for the next work sets.