Waiting for him to lose strength and return to the bed.

He started to reach for the handle, but he'd lost his strength.

They said he seemed to be losing strength and too much weight.

But he still did seem to be losing strength; why?

He tried to rise, but his legs had lost their strength.

She sat down on the edge of the bed as though her knees had lost their strength.

The hand on his arm lost strength, and the color drained from her face.

Every twenty minutes they changed places because they'd lose strength after that.

His voice had lost all its strength and dropped to a whisper.

He leaned against the door frame as if he'd lost his strength.