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.
Tight hamstrings and hip flexors will often occur together. The strong pull of tight hip flexors can lead to an anterior pelvic tilt. This forward tilt of the pelvis causes an increased pull on the hamstrings which contributes to the tightness of the muscle group.