Table 2. Material properties of the lumbar and pelvic ligaments.

Ligament	K (N/m)	Number of springs	Reference
Anterior longitudinal	23.75	10	[23]
Posterior longitudinal	26.15	5	[23]
Interspinous	9.8	10	[23]
Iliolumbar	1000	10	[24]
Anterior sacroiliac	700	25	[19]
Posterior sacroiliac	1400	18	[19]
Sacrospinous	1400	10	[19]
Sacrotuberous	1500	15	[19]
Superior pubic	500	22	[19]
Arcuate pubic	500	22	[19]