Hey Brian, I just read your new article on interval training, and thought I would share a workout I call Jeffries-PTP, mixing PTP with some of Bud Jefferies ideas. I take three exercises, say trap bar deads, incline bench and full contact twists and do a set of 5 of each, then a set of 3, then a set of two using the same weight for all sets(Jack Reape's PTP format), in between each set I do a set of 10-20 kb swings (Jefferies idea), I also kick things off with a set of swings for a toal of ten sets. In ten minutes or less, you have put out 100-200 swings, and ten reps each of three big, basic strength moves. It really does what you describe in the article with respect to pushing your heart to pump!

FWIW

Rick