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.
A: There are 3 main muscles that contribute to a posterior pelvic tilt: abdominals, glutes, and hamstrings. The most commonly tight muscles in posterior pelvic tilt are the external obliques, rectus abdominis, glutes and hamstrings. The American Academy of Osteoarthritic Surgerons says: