It’s hard to ignore that some trainers are leaning on science to explain and justify their training principles and methods. However, none of the trainers I am familiar with have a background in science and research. None that I know read the peer-reviewed literature. None of them appear to have the depth of knowledge to gauge the merit of the science they are relaying. They depend on a third party to explain it to them in a way they can slot into their training and teaching.