Figure 4From: 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 backrest interface pressure (total contact area "TCA", average pressure "AP", peak pressure "PP", vertical location of PP "PP Z " and "horizontal location of PP "PP Y ") induced by sitting posture change from Normal to Off-Loading posture for both Asymptomatic and LBP subjects.Back to article page