Q: In the description of your new e-book [The X-traordinary X-Rep Workout], you mention that Arnold used X Reps. How is that even possible? He was training [at his peak] way back in the 1970s, and X Reps didn’t come around till the 2000s. What’s the deal?

A: We coined the X-Rep term about fifteen years ago, but partial-rep training has been around for ages in various forms. What we did was take the most recent research on semi-stretch-point fiber activation and zero in on the BEST spot on the stroke for end-of-set partials, or X Reps…

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