I'm primarily a big band/jazz player, playing in big bands and jazz small groups. I just finished my sophomore year in high school, and since my freshman year when I was made lead trumpet in my high school's big band by a stroke of sheer luck, I've been doing some intense range practicing and chop building. This has turned me into a great lead player, from a range maxing out at a weak high D/E and terrible tone when I came into high school, to making lead trumpet in my All-State jazz band just a few months ago, with high G-A range and a very strong tone and projection in the upper register. I did this by working almost exclusively on strength and technical exercises throughout my freshman and sophomore years, 1-3 hours a day, adding more as my endurance improved. The only problem with this, as I realized last year, was that my improvisation was terrible (obviously having never worked on it), and as I started listening more to the great jazz trumpet players, I started wanting more and more to be a jazz player as well.
So, as anyone who has taken this path of being both a lead/extreme high note player and a jazz soloist knows, this is a pretty hard goal for a high school player like myself. I started playing trumpet in 3rd grade, but I never really started practicing until 2 years ago, so my practice endurance is not quite at the point where I can do the intense and long practicing of both range and improv that I want to do. Since about 2-3 months ago, I developed a new practice routine where I would do my normal range, strength, and tone exercises for about 2 hours, then break for 2 hours, then practice improv for an hour (practicing licks, transcribed solos, and playing tunes out of the real book with backtracks). The problem with this is that it would be too tiring on my chops, and although my improv started to get better, my range hasn't really increased since I started practicing improv seriously, although my endurance has. One hour of improv practice is also MUCH less than I would like to do, and I find myself forcing myself to stop practicing improv because if I go too much over an hour my range and tone starts to suffer.
My question, now, is directed mostly to players who have chosen a similar path as me of being both a lead player/high note specialist and jazz improviser or anyone who thinks they can help me out. Is there a better or more efficient way to practice both range and improvisation? My range/strength exercises now are very intense, and worked wonders throughout the beginning of sophomore year, so I think practicing improv on the same day just counteracts the principle of resting to build muscle. Is it possible at all for someone as young as me to meet these practice desires, or will it simply take time to build my endurance to the point where I can do 2+ hours a day of both?
Sorry for the overly long post, all responses are greatly appreciated.