You bumped a 3-year thread that revealed a lot.
Much of the advice given was useless.
The OP's daughter was being over-trained. It was not even close.
Seminars may improve a coach's knowledge, but does not qualify to coach the event.
There are some great HS coaches.
These coaches are usually better than almost any college coach.
These coaches have little chance of getting jobs at good colleges without years in the coaching mill.
Outside of the great HS coaches, the quality of coaching in HS can drop fairly quickly.
I was fortunate to have one of the best HS coaches. Not so unusual in the state, as the state had several top HS coaches, so that athletes in the state were ranked very high in the nation, and the CC teams were always ranked at the top or near the top.
My college coaches were much worse than the HS coach, and the 1st college coach was so poor that he was quickly out of coaching.
I would be interested in what percentage of NCAA head coaches are middle-distance or distance coaches. I'm betting that it is a low percentage.
Girls don't have the testosterone of boys. Have to be trained differently when coming in as freshman, and sophomore year as well.
The exception seems to be when the girl was trained for several years prior to HS. Knew such a girl, her mother drove her to be coached by our HS coach, so we watched her workout in 7th and 8th grade. Real talent, got 2nd in mile (just over 5 min) and 1st in 2-mile in state meet as a freshman.
Mileage is the poor coach's answer to being competitive.
30-40 mpw for fresh and soph, done on grass with few exceptions. That is fresh-soph.
40-50 for varsity, done on grass with few exceptions.
Our track, as it were, was dirt-sand, so all the intervals were not on a hard surface, and run in training shoes. Our team only ran in spikes when going to a meet that had a track. And we won, and won, and won.