Table 2.

Summary of model-predicted changes in intervertebral disc stresses and extensor muscle force for the anterior-translated thorax posture, compared with neutral posture. Values indicate maximum regional change, with location of maximum change in square brackets. Values in parentheses indicate percent change with respect to neutral posture. The line of gravity shifted anteriorly an average 64.8 mm (SD 24.4 mm) following anterior translation of the thorax

Region	Compressive stress (kPa)	Shear stress (kPa)	Muscle force (N)
Cervical	24.2 (12.4%) [C2–C3]	−29.8 (−101%) [C3–C4]	4.0 (330.6%) [C2–C3]
Thoracic	183.0 (28.7%) [T12–L1]	86.9 (87.1%) [T12–L1]	180.0 (54.6%) [T12–L1]
Lumbar	358.6 (92.2%) [L5–S1]	100.6 (609%) [L3–L4]	438.5 (942%) [L4–L5]