Adjusting your chair at the proper height can avoid lots of issues.

A chair that’s set too high can lead to pain and inflammation on the inner side of the elbow, according to the American Chiropractic Association. Results can be carpal-tunnel syndrome, rotator-cuff strain in the shoulder and lower-back pain if it’s set too low.

Believe it or not, an important tool is that lever on the bottom of your adjustable task chair. Make this one easy adjustment to improve your workspace ergonomics.

As you stand in front of your chair, adjust the height so the highest point of the seat (when in the horizontal position) is just below the knee cap. Sitting down, your feet should be flat on the floor, with your knees at a 90° angle, the ideal lower body position for sitting down at a desk.

If you can sit comfortably but you have to raise your arms to reach the keyboard or work surface, your workstation is too high. Lower your work surface, perhaps with a keyboard tray. Or adjust the chair height so your elbows are the same height as your desk. Also, use a footrest high enough so you can lay your feet flat. Your desk is too low if your legs can’t fit under the desktop (comfortably crossing legs at the knees) or there’s not enough space to move them freely. Use risers, or buy a desk that’s the proper height.