Sitting at a computer all day could give you a case of the slouches. Dr. Gregory Thielman, a physical therapist, says you can find out if that's the case with the posture wall check.

"You pass by a wall in your house, stand up, check your posture, keep your feet flat on the ground," said Thielman.

Stand with your back against the wall and tuck in your chin. Then walk away and see how long you can maintain the position.

"A lot of times people find out, 'Wow, I am so far off from that position that I'm going have problems,'" said Thielman. "But it's preventable."

He says the key is strong muscles, and you can get them sitting at your desk. For example, pushing your pelvis back into the chair for three seconds at a time will strengthen your abdominals. Lifting your legs does the same for your thighs.

"Keeping our leg muscles stronger is going to put less strain on our low back," said Thielman.

If you're constantly leaning forward at your computer, give your back and neck an occasional break. Without tilting your head, push your chin straight back with your finger, or stand up and do a few back bends. Both exercises will help realign the spine.

"Because, like any job,” Thielman said, “people get focused on their activities. They continue to do what they're doing and they don't think about the position that they're maintaining."

Good posture is more than just standing up straight. It can help you avoid a number of physical aches and pains.

"It's not only the wear and tear on the joints but also losing the motion, which leads to bigger problems and then usually some surgeries down the road, if that's all that can be done to correct it," said Thielman.

If you don't believe him, look it up on the computer -- before your posture starts to droop.