I've actually got a few friends from this gym, Pushmore that can do it.

There's a few ways they do this.

1. A ridiculous amount of bodyweight pull-ups combined with weighted pull-ups. This fellow pulls I think 60KG weighted, at a bodyweight of 65-70KG.

2. Cellphone trick. You pull yourself with 2 arms, and then hold with 1 arm. Pull out your cell phone and send a text message to your friend. When your friend receives it, then you can descend. (A climber's trick) It's said that 1 arm pull-ups are mostly CNS dependant (I agree) and thus if you can coordinate sending a text message while still holding up there, you'd be set for 1 arm pull-ups.

3. Kipping 1 arm pull-ups. Hold the bar with 1 arm, and kick yourself up.

I highly doubt it's got anything to do with your squats or deadlifts. This fellow that does the 60KG weighted pull-ups, only does squats with 70KG. He just climbs and does many pull-ups.

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Added on March 19, 2011, 12:35 pmAnd mate, I think you're going to need a whole lot more weighted pull-ups than that. I'm 79KG and I do weighted pulls with 40KG's more. I'm like 50,000 miles away from a 1 arm pull-up.

This post has been edited by pizzaboy: Mar 19 2011, 12:35 PM