How exactly does lumbar support work on an ergonomic chair?

Adjustable lumbar support moves height-wise to match each user's spinal anatomy; lumbar depth adjustment varies the degree of support applied. Lumbar support fills the natural inward curve of the lumbar spine (about 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. Proper lumbar support feels gently firm, not aggressive. Get the best deals at FindOfficeFurniture.com — dial 888-719-4960 for a quote.