Running as fast as she could, but her legs were weakening.

You've been rowing with your arms for so long, your legs have weakened.

His legs finally weakened and buckled, throwing him to the floor in a faint.

Daemon felt his legs weaken as relief washed through him.

Her legs weakened so abruptly, she sat on the floor.

As the victim's arms and legs weaken, he gradually strangles.

He felt Montcalm's powerful arm move around him as his legs weakened.

His legs weakened as he saw the general's mouth, which was still contorted with pain.

My legs were weakening under me, but I made myself walk in slowly after the policeman.

Rain felt her legs weaken and sank on to the edge of the bed.