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Table 1 Summary of the average (Mean ± SE) values of Total Contact Area (TCA), average pressure (AP), and peak pressure (PP) in Normal posture on the whole seat and the backrest.

From: Biomechanical effects of sitting with adjustable ischial and lumbar support on occupational low back pain: evaluation of sitting load and back muscle activity

 

Asymptomatic (N = 10)

LBP (N = 25)

 

Seat

Backrest

Seat

Backrest

TCA (cm 2 )

1225.5 ± 43.3

429.4 ± 37.0

1271.8 ± 36.2

434.9 ± 18.5

AP (KPa)

6.49 ± 0.28

4.53 ± 0.29

6.44 ± 0.17

4.48 ± 0.18

PP (KPa)

24.7 ± 0.9

22.3 ± 1.4

23.3 ± 0.8

21.4 ± 1.2