Sitting in static posture for prolonged periods of time can increase the stress in the back, neck, arms and legs, and add a great amount of pressure to the back muscles and spinal discs.
Ergonomic chairs reduce back pain.
Proper neutral seating in a well-constructed chair can help reduce fatigue and discomfort, and prevent the risk of injury, and increase productivity.
Let your body take the correct ergonomic position. That means your knees and elbows should be at an angle of 90 degrees with your feet flat on the floor or a footrest. The chair should also provide good lumbar support for the lower back.