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I’ve known some guys with some pretty big biceps over the years and without exception they make the pull up a staple of their routine.
Ideally, anything involving hanging from a bar should work your biceps pretty damn well including levers and hanging leg raises. That said, sometimes it’s nice to put a wee bit more focus on those biceps through an underhand grip.
While many will use a grip that’s shoulder width it’s well worth your time to progress to the close grip pull up as it places a bit more emphasis on the biceps with less stress in your joints. It’s also a critical step towards achieving the single arm pull up.
Learn more details about pull up progression at http://www.reddeltaproject.com