Xcobra, I feel it is my duty to give my 2c after seeing how you say you "want to get in shape again". It is quite arrogant of me to assume you cant do even 5 pullups with good form, but I will do so anyway, since it was(still is) the case with me, and countless other people out there. Many folks can quickly jerk themselves up ten times and call this "pullups", but can you do these same ten pullups slowly, with perfect form, bringing yourself ALL THE WAY DOWN and ALL THE WAY UP every time?
Many people get a pullup bar after giving in to the hype and advertisements and after installing the thing and finding out they can hardly pull their body weight even once, they quickly give up, and sometimes give up not only on pullups but on fitness as a whole. Don't let this happen to you.
I find pullups to be an EXTREMELY hard exercise. Perhaps the hardest one there is and ever was. The only excercise that I found to be almost as annoying and hard are pushups, but I am gettign much better at these lately having worked my way up from 1 set of 5 to 3 sets of 25. Pullups are actually often impossible for people who are overweight or severely out of shape.
When I started, I couldn't even do one pullup with good form. If I was to jerk like crazy, and exhale hard on the movement up, I could sqeeze out ONE, but that's as far as it went. I wasnt overweight or anything like that. I am just a pathetic computer geek. ; ) Hell I cant even honestly call myself that, because gaming is what I mostly do, not something really cool like programming or web design.
Anyway, I did lots of research in hopes that I could find something that could help me get to 10 pullups with good form. To my surprise there's hardly any good advice out there.
Some people say to get a friend to hold your legs and help you up. I have no such friends. Other say to use resistance bands suspended from the bar. I found this to help, but only a tiny bit. The motion become unnatural because the band springs you up half way, and you get only "a half of a pullup" everytime.
What I found to be of best help, is the "weight assisted pullup machine" at the gym. Not sure if it's the proper name for it. Off course it needs to be noted that even this machine hardly helps at all....
It's the combination of all of the above things that finally got me to 2-3 pullups with good form. And that's after TWO MONTHS OF TRAINING!!! What gives? I am not taking it easy on myself. I strain myself to the limit and train really hard. I dring protein shakes. I try to watch my diet, and yet, I still hardly improve on my pullups! Ridiculous!
Some people say: "If you can only do 1 pullup, do 20 sets of one.. then 30, then 50... a hundred even.. till you can do 2 pullups, and then work your way up from there". In my experience this doesnt help. Doing 50 sets of one pullup is a very annoying and long task. I get bored and exhausted only after 10 sets of 1. ; )
Using a chair to get up and lowering myself down slowly.... also very annoying, and makes me feel like an idiot having to climb on top of the chair on every "pull down"...
After two months of training, I think that gettign stronger for pullups really doesnt come from pullups alone. (DOH, right? Well, it's not like I didnt know this before. I just tried to ignore this fact as hard as I could) You gotta do plenty of cardio to get your weight down and warm up those muscles... You gotta do all other exercises to just get stronger in general. Gotta watch the diet and all that... and only after doing all those thigns, can you possibly do 10 pullups.
In the "French Legion" they say that "A man who cant pull his own bodyweight 10 times, is just wasting air". When I heared that phrase many years ago, I really took it to heart, but still I cant do even 5 pullups. Hopefully after a year's worth of hard training I can finally do better.
I wrote all this not to whine or b*tch, I am just trying to give eveyone here another perspective from my point of view on pullups. Just somethign to think about for all those that start pullups after a while of not training and think a pullup bar will magically get them stronger and muscular along with some basic workouts every now and then.
PS: IMHO, a door mounted pullup bar is good but not great, because depending on your height it gives very little space for you to perform the pullup. I am 5'9" and I have to bend my legs to do pullups. On the motion up, I cant really bring my chin all the way OVER the bar because my forehead hits the top of the door frame. This can be avoided "somewhat" by trying to keep the head back, but then this makes the whole exercise that much more difficult. I live in an apartament and I installed a door pullup bar AND another one between the walls of the narrow corridor between the bathroom and the bedroom. This gives me the best of two worlds...