We cannot equate this with a purely biological freedom or vitality, or spontaneity. Bergson and His Philosophy J. Alexander Gunn. It is a more serious difficulty that Paul knows of no Longobardic king with a name which we can equate with Sceaf.
But this posture makes your pelvis rock forward into an anterior pelvic tilt, which consequently creates an increased lumbar curve (lordosis). Unfortunately, other tissues such as the muscles described above adapt to this posture over time, which contributes to back pain and injury.
When the pelvis tilts backwards over 15 degrees exaggerates the characteristics of bowed out lumbar spine and an accentuated lumbar curvature. The causes weak abdominal muscles and tight glutes. Posterior pelvic tilt is specifically caused from: A single event trauma such as a sports injury or a car accident. An event during pregnancy or birth that caused injury or strain to the pelvic joints or rupture of the fibrocartilage.