[QUOTE=Samotis;7133302]
Well, see I broke him as a two year old. Then I hurt my back and he did nothing at 3 and then I started him back up summer last year at 4.
He has always been lazy and I totally blame myself for not making him more reactive to my leg. Now a squeeze means nothing to him.
He is getting better but he still hates moving off your leg.
It’s hard to really be on it all the time with him which is what I have to do. If he doesn’t move when I ask I need to react, sometimes I just plead and like I have learned it goes no where!
I am confident we will get better and like some have said, my legs are no where near as strong as my trainers, he is a foot taller then me and much stronger!!!
There have been moments of brilliance, like a few months ago where he loped a 3 foot course on a loopy rein and could have won anywhere, but those are not the norm at the moment. 
He has the ability, it’s just putting all the pieces together. I also feel he has grown a lot this year which has made him a tad less balanced with the lead change and staying consistent. So e days the lead change is great, other times he has one leg in every direction!!! 
I love him and am so excited to see him excel, I just have a lot of work to do!!
Thanks for the tips.[/QUOTE]
Horses don’t naturally respond to leg, it must be taught. Their instinct is to push against pressure, so for a horse that’s still very green a lot of things will be done through rein aids. Perhaps your trainer is strong enough to move him over in the moment, but if he’s using a lot of that strength and you don’t have it, it doesn’t help you or the horse. IMO it’s not good to force it with lots of pressure so the horse NEEDS tons of pressure to actually move. One needs to encourage lightness as much as possible to avoid getting a horse dead to the aids.
Doing turns on the forehand would help. I find that slowing something down can make it easier for both you and the horse to reach an understanding. Getting suppleness and responsiveness during a turn on the forehand would help a lot with keeping that responsiveness during the ride. Then move on to moving off the leg while walking. Breaking it down like this can help you see where exactly he starts to become unresponsive and where the problem might be in your riding.
It doesn’t sound like an issue of balance to me (though it very well could be, greenies go through many awkward growth phases) because you describe it as him hating moving off the leg in “general” rather than moving off the leg on specific leads. Breaking it down will help find where the problem is. Hopefully someone more experienced than I will come in with more advice. Some horses are just lazy, but others may genuinely not understand what you mean by the leg. My first instinct is to make sure they understand your leg to begin with.