Here is an example of a functional abdominal exercise that would be consistent with running mechanics.
Starting Position, standing approximately 12" from a wall:
-RUE abducted to 90 degrees with elbow flexed
-LLE flexed @ knee 90 degrees
-RUE R rotational reach @ head height to wall
-LLE posterior reach @ knee height to wall.
You can make it harder by placing a dumbell or exercise band in your hand, an exercise band or weight cuff on your ankle. You can increase the tempo etc.
Try this yourself. Do you feel the tightness around your belly button? That is the abs reacting to your extremity movements subconsciously. The way they work when you are running. You can use this as a movement screen too. Can you keep your eyes fixed straight ahead as you move, or do you fell that your head is rotating/side bending? Do you have trouble keeping your balance? Does your hand & foot touch the wall at the same time?
Any movement glitches occurring during this exercise are probably also happening during running. Can you see now that stiffness in the right shoulder could possibly delay the foot locking up (supinating) at the right moment... delaying adduction/external rotation at the knee...causing abnormal patellar mechanics? Kind of like that old "leg bone's connected to the hip bone" song my dad used to sing to us with his ukulele.