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.
Perhaps most important, a posterior pelvic tilt stretches the hip flexors; a group of muscles used to lift the leg and stabilize the spine. A posterior pelvic tilt effectively stretches muscles of the back, specifically, the spinal extensors, latissimus dorsi and erector spinae.