Maintain good muscle tone in your abdominal and lower back muscles.

He is expected to recover, even though another bullet remained in his lower back muscles.

He stretched carefully, kneaded the lower muscles of his back, and sought a straight chair.

Tighten your lower abdominal muscles as if you are going to have a bowel movement.

The arms usually bear the body's weight while the abdominal and lower back muscles must whip the legs around as needed to spin the body.

Press your lower back against the wall by pulling in your stomach muscles.

It is caused by weakness of the lower abdominal muscles.

Flatten the small of the back against the floor by using the lower abdominal muscles.

This puts a strain on the lower back muscles that often results in a serious injury.

The bilateral weakness to both the upper and lower facial muscles was marked.