What backrest angle is ideal for working at a desk?

Research consistently supports a slight recline of 100°–110° from vertical as the sweet spot for extended desk work — it reduces intervertebral disc pressure more than sitting bolt upright at 90°. For intensive keyboard and screen work, 95°–100° is often preferred. Whatever the angle, the backrest should maintain full contact with your lower and mid back — losing contact with the lumbar region defeats the purpose. For resting between tasks, 110°–120° is fine, but it's too reclined for active focused work. Every ergonomic chair at FindOfficeFurniture.com lists its backrest angle range — call 888-719-4960.