Soulman asked me to consolidate some information about pullups into a thread with an eye toward beginners (0 pullups).
First, some definitions:
Pullup: hanging from bar with arms extended to chin over. Don't care about grip or body english - just get your chin over the bar.
Chinup: refers to a supinated grip.
Kipping pullup: Here is a video of a kipping pullup
http://www.youtube.com/watch?v=dV2Fiz0_B28. You can also do "butterfly" kipping pullups. If this thread turns into a debate about whether kipping pullups are cheating, or look stupid, I will ****ing murder all of you. This subject has been beaten to death and nobody cares.
Pullups in any form are awesome. They require almost no technique or equipment and are fun to do. They work your arms and back making you look pretty and are about as "functional" as an exercise can get (especially if you remember being a child and climbing all over **** every day). But, untrained beginners and fat people (despite being able to do amazing things) often cannot do a single pullup. How can you train something if you physically can't do it?
There are two general ways you can get to the point of that first strict pullup (and then you're off to the races):
Assisted pullups:
-gravitron
-bands
-someone pushing up on your ass
-kipping (my favorite)
And Negatives.
There are basically two groups of people that can't do pullups in my mind. Those that are very fat and detrained such that the very act of hanging onto a bar is extremely difficult, and those that just don't have enough strength to get a single pullup (healthy weight detrained folks, and fat trained folks).
For the first group the only real option imo is the gravitron (putting 100lb+ tension on a band that could slip and smash into a trainee's face doesn't seem like a good idea to me). Set the assistance so that the trainee can do 3-8 pullups in a set and just linearly progress from there.
For the 2nd group, negatives, band assist (or gravitron), and kipping/"cheat" pullups are the way to go.
Gravitron - Good place to start as with really overweight/weak individuals. Do the same thing, except this time work on negatives too...
Negatives - All my trainees that can't do a pullup will at some point do these. If they can jump their bodyweight up to chin over do that, otherwise give them a boost. Start by having themselves lockout at the top and simply try to stay on the bar as long as possible. Often after a couple weeks they will become fairly strong at the top of the movement, in which case make them come down quickly to just above their sticking point and hang out there as long as possible. Do 5-10 singles a workout - I usually have people do them between squat sets while we're at the rack. For normal weight individuals, a couple weeks of this training once or twice a week should allow them to progress to...
Kipping pullups - Teach them how to swing, and instruct them to do everything possible to get up and over the bar. Being able to hold a negative for 10+ seconds usually is enough strength to get a single kipping pullup. Train these from now on in concert with negatives until the trainee can do 1 strict pullup. From then on, do both kipping and strict pullups for the rest of their life.
An example: My gf started training with me in July of '09. She was very weak but not overweight - she tried a pullup but couldn't even bend her arms. For the next month we trained them 3-5 times/week. This is a minimum for all you guys, for my paying clients we obviously do them less often.
First three weeks - negatives and practicing the kipping pullup swing.
Next two weeks - first kipping pullups, did singles then doubles then triples, plus negatives.
~1 month after starting training - first strict chinup. Alternated strict chinup workouts with kipping pullup workouts. Adding ~1rep/week for 8 weeks until getting 19 kipping pullups in a set and 10 strict chinups. Now she does kipping pullups and weighted strict chinups for sets of ~5.
Despite being hard for you weak and fat people, there's no excuse for not working on them. Everyone I've trained that couldn't do a pullup and subsequently got them was super pumped.