Sentence:  England's superior <WSD>conditioning</WSD> began to show in the final quarter and as the game began to break up, their three-quarters began to stamp their authority on the game. And when Foden went on a mazy run from inside his own 22 and put Ashton in for a long-range try, any threat of an upset was when and truly snuffed out. 
Meaning of the word marked with <WSD> tags:  Any preparation or training, especially athletic training of the body.