opinions on joe rubio’s 1500m training?

I don't know if this is still the case, but way back in the day, he was super approachable over email about his plans. I didn't follow it to a tee, but I certainly improved under it. But if you're in HS, you may really want to work with your coach before approaching another person (too many cooks in the kitchen sort of thing).

Great training, not meant for a junior in highschool

yeah its good training but it was written for a pretty specific demographic: high level post collegiates with over 4 years of high level training under their belt. 75mpw is pretty impressive for a high schooler, but you'd still need to do that for another 3+ years in order for rubio's specific training plan to work for you. jogging isn't really a bad thing, it keeps you recovered between harder efforts and improves your overall aerobic system. you might just be doing too many miles overall which is why you'd been having mid workouts. just run like 50-60mpw for a bit and I'd be pretty surprised if you didn't start feeling better. if you've got as much autonomy over your training as it sounds like, including some true speed work once every 7-10 days isn't a bad idea though and is imo a big part of training that 90% of training plans are missing out on. just make sure you're actually doing speed work not 400s at mile pace and calling it speed work. other than that, it sounds basic but you'll get the most bang for your buck by doing a weekly tempo (run slower than you think, trust me) and occasionally hit an interval session thats focusing on the 3k-10k type of pace range. if you do all that with a mileage load thats solid, you'll have a strong season.

Great training.

I reference his stuff a lot when planning training for my high school team, but like others said, the plan isn't great for a high school junior. The biggest structural thing, IMO, is that high school distance runners should do 2 workouts + an LR every week, instead of 3 workouts.

Rubio's training has 3 workouts per week: 1 faster than race pace, 1 on race pace, and 1 slower than race pace. When I modify it, I tend to do 1 race pace workout per week, then alternate faster and slower every other week. Occasionally, I'll do a workout that combines faster and slower than race pace, such as cruise intervals followed by 800 pace 200s.