Sentence:  Used in several sets of high reps once or twice each week it will not be long before your entire upper <WSD>leg</WSD> takes on a razor-sharp definition in which the muscles look like wire cables writhing and twisting under the skin ! 
Meaning of the word marked with <WSD> tags:  a human limb; commonly used to refer to a whole limb but technically only the part of the limb between the knee and ankle