Back in my bad old bodybuilding 6-12 rep days, I used to do a lot of pyramiding/HIT style training..... (spits on the floor). Having totally changed things up, I know only consistent weight training (eg 5 x 5 x 100). I have also seen however on here mention of 'intensity' workouts (ie 50 x 5, 60 x 5, 70 x 5, 80 x 5) whereby presumably your early sets are way sub-maximal. What is the rationale and/or pros and cons of the 2 styles???