Now for those Lordotic types..

So if you are not Swayback but are Lordotic..means you have a lumbar curve in your spine but its deeper than it should be.... want to see if you are??
Place the heels of your hands on your hip bones, fingers facing down to pubic bone and thumbs towards each other.. if the hip bones are forward of the pubic bone this is classed as lordosis, and increased curvature of the spine.
Tucking your tail bone under is great for you, until the hip bones and pubic bone are all on the same level. (if its hard to feel this standing, do it lying down on the floor on your back)

Head – the head is usually in a neutral position.. not tilted forward or backwards.
Neck –  usually a normal curve in the neck
Upper Back –usually a normal curve in the upper back
Lower Back – the lower back has an increased curve
Pelvis – the top of pelvis is titled forward
Knee Joints – the knees are slightly hyperextended
Ankle Joints – the angle between the leg and the sole of foot is greater than 90 degrees

Weak Over Stretched Muscles
The forward tilt of the pelvis increases the distance between the top of the pelvis and the ribs. This lengthens the front ab muscles . They should counteract the forward tilt of the pelvis keeping it neutral
Your hamstrings( back of the thigh, 3 muscles)  insert into the base of the pelvis(sit bones), the forward tilt of the pelvis lengthens them . The hamstrings may or may not be weak.
Tight  Overly Strong Muscles
An increase curve of the lower back shortens the lower back muscle, these muscles can also be overly strong, pulling the back of the pelvis upwards(tailbone) causing a forward pelvic tilt. The hip flexors (Psoas being the primary one) can also be tight, overly strong, tilting the pelvis into that lordotic curve

Being aware of this increased curve as much as you can and doing exercises to help the awareness and address the muscular imbalance(Pilates! yay!!)helps prevent twinging in the back, as you move, as you function from day to day, bending down to pick up objects from the floor, hoovering, washing up, carrying shopping home or in and out of the car..sitting at the computer, watching TV..the list is as long as the daily tasks you perform!

Sitting on the floor in neutral with the sit bones placed equally and grounded is something you can do fairly easily without pain, its the shoulder placement you need to be aware of now, the settling of the rib cage, the circle of the rib cage floating above the circle of the pelvis..the lengthening of the spine and the crown of the head.