Figure 3From: Biomechanical effects of sitting with adjustable ischial and lumbar support on occupational low back pain: evaluation of sitting load and back muscle activity Average changes (in percentage, Mean ± SE) of parameters of seat interface pressure induced by sitting posture change from Normal to Off-Loading for both Asymptomatic and LBP subjects. A. Total contact area (TCA); B. Average pressure (AP); C. Peak pressure (PP).Back to article page