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.
An anterior pelvic tilt alters the positioning of the femoral head and can cause hip impingement, as shown by this study:http://www.ncbi.nlm.nih.gov/pubmed/25060073. This picture shows the basics of correcting an anterior pelvic tilt http://i.imgur.com/GjSI3.jpg. Generally avoid flexion + adduction + medial rotation.