There are also key health benefits that come from working out your arm muscles ... A repetition (or rep) is one complete exercise movement. For instance, one dumbbell curl. What is a set?
Charles Glass Shares Preacher Curl and Cable Skullcrusher Tips and Adjustments for Instant Arm Gains
The 'Godfather of Bodybuilding' Charles Glass shared how to maximize arm gains with preacher curls and cable skullcrushers.
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