Working hard but you just can't lose that stubborn fat on your tummy? Doing lots of crunches and endless hours on the treadmill to try to get rid of it? Here's a little secret: When you sit all day -- as almost all of us do  your butt muscles turn off and your hip flexors (the muscles on the front of your hips) get short and your abdominal muscles stop working.

This causes your hip bone (pelvis) to tilt forward which puts stress on your back causing, yes, lower back pain but it also pushes your belly out. You can be adding to this scenario with exercises like crunches and running on the treadmill creating shorter and shorter hip flexors. So you look like you have a gut, even if you don't have an ounce of fat! Continue Reading at Huffingtonpost