Today I talk about “Super Joints” by Pavel Tsatsouline. I speak Particularly about back bending and the need to contract muscles antagonistically in order to keep your spine safe or to stretch. To find out more about Pavel and his books, find him here: https://en.m.wikipedia.org/wiki/Pavel_Tsatsouline . His books are on Amazon. You can also go to his website https://www.strongfirst.com/.