Hi hazardous,

Why are you turning your body like this? Twisting the torso is GREAT for the spine ... but I'm note sure why you would need to do this regularly.

The xiphoid process and sternum are in the middle of the chest, which connect the ribs to the bones of the shoulders...is this popping? or aching? or what?

Damaged cartlidge is a good guess. It is very possible, that it is something called "Costochondritis", which is basically the inflamation of the cartlidge that binds the ribs to the sternum.

Minute movements of the ribs, can cause irretation and inflamation of the chest wall. I get it a lot, but that's because my ribs move around much more than just a little . If you have been doing a lot of exercises and/or sports and/or other activities that cause you to turn your body in that fashion, it would most definately explain it.

It can at times, be very painfull and extremely irretating, but that's about it. It is not a dangerous or serious problem.

If it becomes too painfull and/or irretating, you can ask your doctor for anti-inflammatories.

The main reasons of getting the heart pains or heart attacks is because of over weight, so if you can keep you are weight in control then there would be no problem.

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lol. well I work out on a daily program. Its not popping and its not aching its just sore sharp pains right in the middle

When does this happen? When you breathe in?

no just when I turn my upper body like when ur sitting down and look behind u

Well, for a full diagnosis, you might want to request an MRI ,which is an image of the soft tissue of the body --- to identify once and for all the cause of the pain.