 Because of this functional design, during dynamic movement there is more dependence on core musculature than just skeletal rigidity as in a static situation.This is because the purpose of movement is not to resist a static, unchanging resistance, but to resist a force that changes its plane of motion.By incorporating movement, the bones of the body must absorb the resistance in a fluid manner, and thus tendons, ligaments, muscles, and innervation take on different responsibilities.