Some Interesting Facts…
Studies have shown that pressures vary greatly in the lumbar discs with different positions and activities.

Data converted and calculated from: In Vivo Intradiscular Pressure Measurement in Healthy Individuals and in Patients with Ongoing Back Problems. Sato, K. MD; Kikuchi, S. MD; Yonezawa, T. MD. Spine, v.24, 1999, p. 2468. Average Weight: 161 Pounds.