Flat back posture is a type of posture that is characterized by the lack of natural curves in the spine. It’s a condition where your back loses some of the normal curvature (Lumbar Lordosis). A person cannot maintain a proper balance if such natural spinal curves stop functioning effectively. Without them, the spine becomes a straight line from the neck to the pelvis. Resultantly, it causes the center of gravity to move too far forward
As a result – the alignment of the spine (as viewed from the side) is flatter than normal.
In Flat back posture, the spine has a poor ability to absorb and distribute mechanical stress evenly throughout the body.
As a result, the muscles may have to work harder to help stabilize and move the spine.