In Mr. Kurz's article and Science of Sports Training, Mr. Kurz states "one can start with the more difficult static active stretches that require relative freshness. For taekwondo fighters these may be slow-motion high kicks or holding the kicking leg in the high chamber position needed for multiple kicks." I have read and re-read both of Mr. Kurz's books, Stretching Scientifically and the Science of Sports Training, many times thoroughly, but I still don't understand what does "relative freshness" mean? Also, why can't I do static active stretches after isometric stretches? Furthermore, I know that both of the books mention that I can do static passive stretches and dynamic stretches everyday, yet they say that I should only do isometric stretches for only 3-4 times per week at the very most. What about static active stretches though, is it okay to them everyday? Please help me clarify all this for me!