So most of you are probably aware of the first 3, but “OS”?… what’s that, right? OS stands for oppositional stability.
Simply put, that is one segment of the body going one direction and another segment of the body going in the opposite direction to produce stability somewhere in between the two segments.
For the thruster and clean, OS is found in a solid front rack with elbows driving forward/up and hips driving back and down to produce stability at through the spine and shoulder complex. This video discusses this necessity at different time, modal, and intensity domains. Enjoy