We have discussed “neutral spine” in the standing position, now we need to think about the position of the pelvis lying down.
Lying on the floor, knees bent and in line with hips, feet flat on the floor and heels in line with sit bones.
Gently rock your pelvis forwards and backwards as in the standing position. Flatten your back towards the floor one way and then arch your back the other, exaggerating the curve in the lumbar spine as your move in the opposite direction. Halfway between those two points should be close to your neutral spine.
Later this week I will discuss core activation.