I'm a freshman in high school and I run the 400m and 800m. My 400m PR:56.34 and 800m PR: 2:23.1. My question is how much anaerobic/aerobic training should I do to break 2:10 on my 800 and 54.5 on my 400m? Those are the times to qualify for regionals.
(My story) I always start the 800m off very fast and run my first lap in under 62 seconds, but I always get so tired and always lose the race in the last 300m when people kick it home and I simply can't.
It sounds like speed isn't the problem, but aerobic strength is. What you need to focus on is what I call "Tempo Runs" You should do some of these faster than average distance runs, but not too fast to build aerobic strength.
The basic premise of this type of workout is being able to hold onto a pace for a longer stretch of time. As for your 800 meter race. Going out in a 63 is probably perfect if you want to run a 2:10. Get those distance runs in. I think you have enough speed.