She heard the door behind her open, and every muscle tensed.

His muscles tensed with the effort of holding himself back.

His muscles tensed and for a moment I thought he was going to jump me.

When his muscles tensed, I knew he was going to rush me the last couple of feet to the door.

It wasn't right, I knew that, because every muscle in my body tensed at once.

Every muscle in his body tensed as she crossed the room to him.

Kelly asked in a low voice while the muscles of his arms tensed.

The muscles in my back tensed, and for the first time I felt uncomfortable with him.

The moment she spoke, the muscles in his shoulder tensed.

Every muscle in his big body tensed, but there was no way he could deny her.