How does lumbar support work on an ergonomic chair?

Lumbar support fills the natural inward curve of the lumbar spine (approximately L2–L4 vertebrae, just above the belt line) to prevent the lower back from rounding forward during prolonged sitting — which increases intervertebral disc pressure and causes lower back strain. Adjustable lumbar support moves height-wise to match each user's spinal anatomy; lumbar depth adjustment varies the degree of support applied. Proper lumbar support feels gently firm, not aggressive. At OfficeFurniture2go.com, all ergonomic chair specs include lumbar adjustment details — call 1-800-460-0858.