Chins. That's the answer. Wide-grip chins where you pull up to your chest.

Two big problems though: First, most people are not strong enough to do more than a few chins at best. I was one of them. My pulling strength has never been that impressive. Second, your grip usually fails you before your back muscles tire out.

Here's how I overcame it and built up to finally being able to do sets of 10 or more chins. For me, that's good.

Work your back every other workout... but just chins. Do just ONE perfect chin-up in-between your other bodyparts. Using 7 Minute Muscle, this would be at the end of your workout.

Just one chin. But do it with perfect form.

Next workout, get two. And so-on.

Sounds utterly simple... and it is... but it trains your brain and back to connect. And it builds confidence in doing the movement. You'll be doing chins for sets sooner than you think.