How do I adjust an ergonomic chair for proper posture?

To adjust an ergonomic chair in India for proper posture, start by setting the chair height so your feet are flat on the floor, with knees at a 90-degree angle. Adjust the backrest to support the natural curve of your spine, ensuring lumbar support is aligned with your lower back. Set the armrests at a height where your elbows are at a 90-degree angle and shoulders relaxed. Make sure the seat depth allows you to sit comfortably with a small gap behind your knees.