1.   Consequently, some muscles rapidly weaken.

2.   As the motor neurons die, the muscles weaken and shrink.

3.   Because I was less active, my stomach muscles weakened.

4.   Left untended, our muscles weaken and our bones lose density, bad news for a piece of anatomy built on these two blocks.

5.   The calcium impedes, the muscles weaken, the explosive movements of the legs and shoulder capsules are retarded.

6.   The muscles steadily weaken, usually for about two to four weeks.

7.   As the brain and spinal cord motor nerve cells die, muscles weaken and shrink.

8.   But the strained nerve had caused the shoulder muscle to weaken.

9.   Doctors are still trying to figure out why the muscle weakens to the point that it causes constant heartburn.

10.   The ciliary muscle weakens and the system fails to adequately focus the image.