She fought to sit up, but her legs wouldn't obey her.

I would have resisted, but my leg wasn't obeying orders.

Pardee tried to stand, but his legs wouldn't obey him.

He tried to put on an extra burst of speed, but his legs would not obey.

Alex tried to move but his legs wouldn't obey him.

Theon tried to run faster, but his legs would not obey.

Women's legs obey mechanical laws, of course, and move apart while they are being used.

His legs would not obey him and still the knights came closer.

He walked along the path but his legs would not properly obey him.

He tried to back away, but found that his legs would not obey him.