I've always been kind of weak in the arms in ratio to body size, and have always had a problem with pull ups. Can anybody suggest exercises apart from curls that would help me to perform pull ups?

Lat pull downs.

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also do weighted negatives with maybe 40% plus of your body weight strapped on a weight belt.

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Don't over analyze this; if you want to do more pull-ups, do pull-ups, if you can't even do one, they make machines designed to give you assistance.

Yeah, just keep doing pullups and once you can get over 10, add weight until you can still only do 10.

Also, if you can do more than 1 rep, do 50% of your maximum reps.

Take a minute or 2 break.

Do 50% of your maximum again.

Repeat about 5 times.



Do this with 2 or 3 days rest between.

Keep checking back on your maximum every 2 weeks.

http://www.4mcd.usmc.mil/AOP/OSOHyat...%20Program.htm

Also there is Recon Ron's Pullup Routine

- http://webpages.charter.net/bert/reconron.html

Here is a video if you are finding difficulty with pull-ups, it shows using extra equipment can really improve your pull-up method and outcome. Here.