Coach,
 
By VAT are you referring to a form of linear periodization.  I remember you breifly talking about this at a Hammer Strength clinic, and saw you referred to it in a recent post. I am just trying to get some clarification on the true meaning of the term.  I briefly skimmed through past posts to find a definition or explaination  but still have some confusion on the term. Also, is this something you would use for an entire block of training ( saw where you mentioned high school athletes), a cycle, a certain  tier, or all of the above?