(ABC) -Is there a quick fix to look slimmer, taller and more confident all while improving your health? Turns out there is, and you don't have to be a movie star to get it.

Stand up straight, sit up…it sounds like nagging, but it's actually healthful advice.

"Good posture is aligning your joints and your body in a way that puts the least strain on your muscles," explained Dr. Diana Sodiq, Emory Othropaedics and Spine Center.

However, Dr. Sodiq says we often have bad posture. The biggest mistakes made while sitting are jutting the head forward, slumping the shoulders, crossing the legs and leaning to one side, especially when driving.

"If you have bad posture, over time, you can have neck pain, headaches, upper back pain, low back pain and overuse injuries," Dr. Sodiq explained.

You can actively work to improve your posture.

"Feet are flat on the floor, her hips are all the way back against the chair, her back is all against the chair and then her head is neutral," Dr. Sodiq showed.

To check your standing posture, try the wall test. Stand about two inches away from a wall. If you have good posture, your shoulders, head and buttocks should all touch the wall with enough space to slide one hand behind your lower back. Sitting or standing, here's a tip for good posture:

"Imagine a string pulling from your head to the ceiling," Dr. Sodiq said.

In other health news, March is Colon Cancer Awareness Month and the Cancer Centers of Southwest Oklahoma in Lawton, Duncan and Altus are offering free colon cancer screening kits through the end of the month. Visit any of the three locations to pick yours up or inquire about all of your screening options.

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