When you think "core" do you also think about the diaphragm and breathing? You should. You really should! Your "core" is not just your abs! It includes your lats, glutes, obliques, psoas, QLs, lumbar erectors, travnsversus abdominis, pelvic floor, and......THE DIAPHRAGM!
"If breathing is not normalized, no other movement pattern can be."
-Dr. Karel Lewit