He spoke again, and the muscles in my arms and legs stiffened.

Lose the kinks Back muscles often stiffen while we sleep.

All my muscles stiffened, and not in a good way.

For a moment his muscles stiffened and relaxed convulsively, then he lay still.

Jean's head came up and she listened, every muscle stiffening with fear.

She looked tenser, as if her muscles had stiffened.

Every part of her seemed stretched, her muscles stiffened as if she had been pierced rather than entered.

The blood loss must weaken him swiftly, and the damaged muscles would soon stiffen.

And when the muscles stiffen it is no better, for then they quiver.

She felt his heart jump and his muscles stiffen beneath her touch.