Final answer:
Good posture is important for successful keying. It helps to avoid back strain and damage to disks. Sitting back in the chair with proper alignment can prevent unnecessary stress on the back.
Step-by-step explanation:
Posture is important to successful keying. When sitting or standing with good posture, the person's center of gravity lies directly above the pivot point in the hips, which helps to avoid back strain and damage to disks. For example, when typing on a computer, sitting back in the chair with the body aligned properly can prevent unnecessary stress on the back.