The word “fold” is typically used synonymously with “consecutive”.
Thus 3fold = 3 consecutive jumps, and so on
Also, unless otherwise noted, these ‘fold’ jumps or hops are performed double leg
Regarding Mark’s article, Mark is a friend of mine; however, I think his data showed that what he had the athlete perform was beyond what was necessary to improve his results.
Using one example only, note how the client’s starting bodyweight was 200lb with a vertical jump of 23". That’s a power index of 67 (which is terrible) I had female high school PE students scoring in excess of that, with presumably far lesser strength levels, and I certainly didn’t resort to block training to further their results. Furthermore, I had dozens of skill players at PITT scoring in the high 80s to low to mid 90’s who still progressed without performing rigid block standards.
The plan that Mark illustrated is logically presented; however, the application was misplaced.
I feel qualified to make such statements because Dr. Verkhoshansky selected me to serve as the primary editor of the English text in much of his English publications dating back to 2007 and if you have the most recent SST you’ll see evidence of this on page XIX
Dr. Verkhoshansky was clear in stating there is a time and place for instituting block methodology and as I illustrated in my recent article in M&F (which was significantly edited and finalized without my review in case you’re wondering about some of the writing) Mark’s client, who surely improved significantly from its use, didn’t require it.