Are you feeling achey, sore, and a little stiff from that cheap office chair? If so, then chances are you have it set up all wrong. Here’s what you need to do to fix that.

Adjust the Height.

Stand in front of your cheap office chair and adjust the height so that the seat goes to about your knees. Then sit down and make sure that your feet aren’t only flat on the floor, but that your thighs are parallel with the ground. You should feel even pressure on the balls of your feet.

Fix the Seat Back.

Even your cheap office chair should have a lever that adjusts your seat back. Set it so that the seat’s depth should allow at least a few fingers or at most your fist to fit between the back of your knees and the front of the seat. This will help ensure that both your upper back and your lower back are evenly supported by the backrest.

Set the Armrests.

Your armrests should allow you to work with your arms bent at a 90 degree angle with your keyboard and mouse. You elbows shouldn’t be up higher or lower than that.

Rearrange Your Desk.

To be perfectly fair, your chair might not be entirely responsible for all of your aches and pains. It’s a good idea to rearrange your station so that it’s ergonomically optimized. Move your keyboard so that the “B” key is directly in front of you. Move the monitor so that you don’t have to look down nor up–just forward–to see what you’re doing. Your line of sight should be straight ahead.

If you can’t seem to adjust your cheap office chair in a way that feels comfortable, you might want to consider investing in one of the best ergonomic office chairs for back pain, lest you wind up doing permanent damage to your musculoskeletal system. If you have any questions about doing said adjustments to your cheap office chair, feel free to ask in the comments.