Sentence:  Mr. Claude is a specialist in torso development and he has long favored the now famous Weider Push-Pull Super-Set technique in which <WSD>one</WSD> exercise of the Super-Set is a pressing or `` pushing '' movement which accents one sector of a muscle group in a specific way , followed by a `` pulling '' exercise which works the opposing sector of the same muscle group . 
Meaning of the word marked with <WSD> tags:  having the indivisible character of a unit