His chest was rising and falling as if he'd run a race.

Her chest still rose and fell, but that remained the only sign of life.

Town wondered if the man was still alive: his chest did not rise or fall.

It seemed to him that he saw his chest slowly rise and sink.

Then she might notice that while he slept, his chest did not rise and fall.

If the chest does not rise, tilt the person's head again, and give another breath.

She pulled back from him, then, her chest rising and falling rapidly.

He seemed to be frozen in place, his powerful chest rising and falling.

He was breathing very fast, his chest rising and falling.

He saw that the man still breathed, his chest rising and falling.