Quote:
Originally Posted by grit
what exercise would best focus on the peakiness of the biceps?
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Biceps peak is genetic, same as having a "barrel chest". The only way to increase your peak is to get a new set of parents. Don't be fooled to believe that isolation curls work the "peak", ect..
But, you can maximize your biceps from heavy barbell curls and incline curls. Work on that hard squeeze at the top of the movement as Verb said. Just focus on making them grow, and if you develop a greater "peak", then consider yourself one of the lucky ones.