Excellent training findings/research articles offered by jr.
Opening up new thoughts and ideas can most always be a bonus to most of us, if taken the time to study. Some may hold merit, some may not, but we can gain a certain amount of new knowledge to explore and judge for our selves. Each of our bodies are the ultimate experimental lab of what works for us and us along.
That said, I'm not that big of what I call slide rule training, with mathematical equations, percentage of weight, variables, etc.. Leading almost into a study of Pythagprean theorem's. Other people may swear by this method, that's their choice. If making progress, week by week, than good for them. This is a BB'ing site and actually BB'ing is pretty simple stuff after all.
I do favor the tonnage + time protocol with applied SAID (Specific Adaptation to Imposed Demands) which is just a fancy term for progressive load. And does require basic math. Along with this, Square Root training (my term) for systems like 10X10,8x8 6X6, 5X5 and even 3X3. Don't need much head banging to understand these pretty simple concepts. Following the K.I.S.S. (Keep It Simple Stupid) of course.
Good Luck.