The ideal alignment/placement of the pelvis is in the “neutral” position. Neutral pelvis is when the plane made by the pubic bone and what we call the points of hip are parallel to the floor when lying down or parallel to the wall when sitting, kneeling, or standing.
Those bits well call the points of the hip are actually part of the pelvis and not really part of the hip joint at all. They’re called the ASISs – Anterior Superior Iliac Spines. – and are part of the iliac crest.
The Pelvis is made up of three bones: Two ilia (iliums) and one ischium. The sitz bones are really pointy bits on the bottom of the ischium called the ischial tuberosities.
Lie on your back with your knees bent and in the air, feet hip distance apart. Place flat, straight hands on your pelvis with the heels of your hands on your hip bones (really the ASIS) and the fingertips reaching for and touching the pubic bone. You’ve made a triangle with your hands on your belly.
Pick your head up enough to look at your hands and decide if the “table” you’ve made is level to the floor. Or is it tipping toward your head or your feet. If the “table” is not level, make adjustments until it is – reach your tailbone down into the floor or tuck your tailbone just a bit. There should be a some space between your low back and the floor.
This is neutral pelvis or neutral spine. This is the goal alignment of your spine when doing any exercise or going about your day. It may be difficult at first to maintain this position, but keep trying!