Performing the 'big three' exercises using the Russian descending pyramid protocol increases torso stiffness, potentially due to lasting neural adaptations.

“Then we did experiments where we would train people. We would just have a single session exposure. We would measure the core stiffness prior to doing the big three. They do the big three on the Russian descending pyramid and then we would rememeasure their torso stiffness. Peter, they they were they were stiffer.”