lie on your back, upper back on the ball, soles of your feet on the floor. find the neutral position of your back and pelvis, "flatten" your abdomen and lift your pelvis towards the ceiling.

Make this proper case.
Lie on your back, upper back on the ball, soles of your feet on the floor. Find the neutral position of your back and pelvis, "flatten" your abdomen and lift your pelvis towards the ceiling.