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Tip: Biceps 21's – A New Variation

This variation of the 21's method involves using 7 leaning curls, a 7-second isometric with a twist, then 7 full-range reps.

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Muscles have the lowest potential to generate force when they're either fully elongated (stretched) or fully shortened (contracted). They generate the highest possible tension in the middle – halfway through the range of motion. Another reason to focus on the mid-range is because it's the position where maximal loading of the biceps occurs.

We can use that info to make the classic 21's method for biceps even better. Try this:

  • 7 Leaning Biceps Curls
  • 7-Second Isometric Mid-Range Hold with Wrist Pronation/Supination
  • 7 Full Range of Motion Reps

Perform this protocol using two sets of dumbbells. Begin with the lighter set and perform the first exercise, then switch to a pair that's 5 pounds heavier and perform the other two exercises. For example, start with 20-pound dumbbells, then switch to 25-pound dumbbells.