I don't know what to tell you my friend. I honestly do not care to discuss with you the benefits of weight training, but I am going to tell you it is very hard to over load the muscles of the leg with out additional weight. Pistols will be your best bet, but you're up to 8, so may I suggest pistol box jumps?
Weight training can be done anywhere, anytime if you are creative and resourceful. Just a lil' fyi for ya. Rocks? Logs? Small children?
Hmm.. I don't know about the small children part

but rocks and logs would seem a good idea, especially after reading the advice other people have posted in the entirety of this thread

I'm beginning to think that weighted training may do me quite a bit of good, and if like you said I become "creative and resourceful" in finding things, I could start. It's just the idea of using barbells or other specialist equipment that I don't like, but using items found in the environment seems cool to me.
Even if you mainly weight train, that doesn't mean you can't train anywhere anytime. For instance, I go on 1-2 week long hunting trips, this is a long time to unintentionally be away from the gym and weight training, how do I train while on the trip? I substitute squats for weighted pistols (with rocks, a backpack, etc.), Natural Leg curls for Deadlift, vertical and broad jump for power clean, weighted chins (once again rocks or another natural weight), Weighted dips on the on something angled like this ^ or on a single bar or wall, etc. Just because you weight train doesn't mean you HAVE to have a barbell at your hands, its just more effective that way.
Fair enough; like Shae said, being creative with the environment is key to being able to train anywhere with additional weight.
Ryan man, you sound EXACTLY like one of my teammates, and I always try to give him the same reasoning the guys above have already given in this thread, only to get the EXACT same responses from him as yours. Just feels like a bit of a deja-vu experience to me.
BTW, apart from the fistful of lower-body bodyweight-only exercises listed above, good luck trying to find more. I've been hunting for some good bodyweight-only lower-body exercises for a long time (to train some of the weaker trainees under me to learn to handle their own bodyweight first before they can move on to lifting additional weight) but could only ever locate weighted alternatives. Your lower extremities are already so strong from carrying around your entire body all day long that it is really difficult to stress them enough to grow larger or stronger from just bodyweight exercises, and there aren't even that many lower-body exercises around. The ones I can think of are non-weighted Squats, Pistols, Lunges, Step-ups, GHRs, Hyperextensions, Good Mornings, Calf Raises. If you look at the poundages of the recommended starting weight for these exercises for a healthy, normal 18 year old male, you will see that doing non-weighted versions of these exercises is pathetic, and only for the really frail.
Firstly, I'm pretty sure I'm not the same guy, because I'm currently living in the UK for a while

Secondly, I definately see your point about the lower extremity strength thing; about us moving around all the time so that our bodies know how to handle the bodyweight already.
"I can imagine the hard work I'll have to put in to get a further 6", but it's all possible with time; I'm trying to take my training slowly, so as not to avoid injury. I believe it should be taken slowly, especially after reading "Dilution" by Blane."
you are much more likely to gain injuries with the approach you are talking about. your talking about doing exercises that do basically nothing for strength and mixing in plyometrics on top of a poor base. not only are you probably not going to get that extra 6", but you will more than likely end up with some form of tendonitis. i did exactly what you are talking about for lower body and i ended up with ITBS. now im weight training and its getting better and my vertical is improving. although i have to admit pistols, single leg glute bridges and single leg hip thrusts are pretty good body weight exercises
but better with weight
Hmm, I didn't think I would get any injuries by taking it slowly, but from your experience it seems like there's quite a high chance. Using additional weight is looking a lot more essential for preparing the body for parkour. Thanks for the bodyweight suggestions, btw

I think after reading everyone's advice, I'm going to start using weights found in the natural environment. However I don't want to limit myself to a gym

I'm re-evaluating my system of training now; I'm going to add in some weighted sessions for the next six weeks to see the benefits (Apparently six weeks is the minimum time required to see solid strength gains or something) Does anyone have any suggestions as to how to start training with weights; I know the techniques, because I've researched it today, before trying it out and tweaking it.
By the way, does anyone else find it extremely annoying whilst writing long posts? My screen seems to get to a certain number of lines before not letting me see the rest of what I'm writing without shooting back up afterwards. It's hard to describe, but if anyone else has problems with posts, they'll know what I'm on about
