What is the opinion of Reddit about the
Science and Application of High Intensity Interval Training: Solutions to the Programming Puzzle?

You know an article is scientific when the author considers crunches, planks, and the Blackburn series appropriate for HIIT. Also, when the author considers 75% of max HR to be “high intensity” (or even describes HIIT in terms of % max HR).

By the braindead, common meaning of “HIIT” (i.e. it feels hard and has a timed component), fine. Whatever. But it ain’t “advanced” or “science.”

OP might want to read a book.