Call center workers had appropriate chair height that affected their knees at an angle of 90 degrees (51.4%). Next,
knee angles at more than 90 degrees or sitting on chair too high was 27.3%. Pan depth was approximately 3 inches
of space between knee and edge of seat but non-adjustable at 61.6%. Elbows were supported by armrest in line with
shoulders (shoulder relaxed) at 64.4% where 53.7% can not adjust. Large number of workers (57.9%) sat on chairs
with leaning forward posture. Back support was adequate lumbar (chair reclined between 950-1100) at 40.3%.