I might have a little something to add  ,
Quote:
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Originally Posted by Flawed
The average teen thinks they should do pullups with palms facing in... not saying you are the average teen, but the best way to go at pull-ups i palms facing out.. at first you may get less than the other way... but once your back gets used to it you will be able to pound them out. Just compare the muscle sizes... your back is HUGE compared to your biceps... also while doing the pullups part of the PFT you can switch grips... best way to go at it is as many as possible with palms facing away from you (using back) and then switch to palms facing you (Biceps). Also when doing the pull-ups, when you come down your arms must straighten completely or they will not count it.
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The grip is actually the difference between chin-ups and pullups. Some people use them interchangeably, but not everyone. A pull-up is a type of chin-up but not vice-versa. Chin-ups are supinated grip (palms facing you) and pull-ups are pronated (palms away). Chin-ups will involve the biceps more (and make them more available). From what material I've found on this, back involvement is about the same for either one provided you start at full-extension and finish with full contraction and retraction of the shoulder blades. Even if you use very strong lats from full extension to power through and use momentum, the grip won't make much difference in how you got that stong back.
It's somewhat like saying I want to lesson the involvement of my tri's during bench in order to get a stronger chest. It just doesn't work that way.
It's just like anything else, at different points in the movement different muslces involved are doing more or less work. A chin-up involves elbow flexion. Your lats can’t flex your elbows.You're going to need your biceps and certain muscles of your forearms for that. Trying to make the biceps less involved in a movement which is partly elbow flexion is not going to add emphasis to a muscle which is not involved in elbow flexion. I personally would use the grip which allows for the greatest range of motion or switch it around.
I guarantee though, that no matter what level you are at if you are going for reps and start with a pronated grip you’ll be able to pump out a few more by switching to supinated at the end. One way or another won’t necessarily lead to a stronger back but I mostly like to use pull-ups and switch to chins if I need to. But sometimes I switch it up for variety.
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If you act sanctimonious I will just list out your logical fallacies until you get pissed off and spew blasphemous remarks.
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