Your hips are made for either powerlifting or Olympic lifting, probably not both.
Core stiffness, stability help create speed.
Assess hip motion to determine squat depth and where to start deadlifts.
Maximize training volume by eliminating energy leaks. This includes movement with uncontrolled spinal motion.
100% MVIC of rectus abdominis is achieved with stir the pot and pushup walkout vs 20% for Situps.
Some discs are made to lift heavy and others allow more motion (golf swing), but not both.
Jumping ability static vs step start is dependent on anatomy.