Lifters and non-lifters alike have a fascination with big, muscular arms. For bodybuilders, the biceps are a signature muscle, and who doesn’t like throwing up an arm and flexing their biceps?! From a ...
It’s unclear who invented 21s, also known as the Matrix training system. Some attribute 21s to Dr. Ronald Laura, while others credit old-school English bodybuilder Wag Bennett, an early mentor of ...
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