Personally, my legs respond very well to any sort of weight stimulus. For the last couple of years my workouts consisted of full body exercises and my legs grew a lot faster than the my upper body. For comparison – my legs are 24” at the widest and my waist is ~30”.
I think this is true for most people. Simply because you can lift a lot more on a squat or deadlight than say a bench press.
Over the past couple of months I tried to restrict leg workouts to balance out my physique. I did 1 set of heavy single leg presses followed by 5 or so negatives once a week. My legs grew faster than ever. Right now, I have discontinued all leg workouts.
Over at fitnessblackbook.com, Rusty Moore is of the same opinion. He has a similar problem where his legs get too big too fast. He reckons that his High Intensity Interval style cardio is enough of a leg workout.
I now work out the rest of my body in the same manner as I trained my legs previously. It seems to be working, although i don’t have any results to report yet. Hey, I figured if its working so well for the legs why not try it for everything else?
The only thing that concerns me with this approach is that by not recruiting and stressing the muscle fibers in my largest muscle group I maybe limiting my Growth Hormone response (more intense workouts/fibers recruited = more GH released).
I used to ride the bicycle a LOT when growing up. Maybe that's why my legs respond quickly? I wish I did more pushups and pull-ups :)