Tinman, congratulations on Drew's success. 3:57.81i in hs is hard to believe but while sick just indicates how fast this kid can run this year. Thank you also for the clarification that your athletes run multiple paces. We see the 10k pace (for 1k repeats), the mile pace (for 200s), and the faster stuff (for strides), as well as the very easy recovery running (7 minute pace after the nike camp hard run), so presumably there is also some 1 hr pace type running for tempos, since you wouldn't have them running 30 minute pace for a 20-40 minute tempo. It didn't make sense to me that he was just doing 10k pace to train to run sub 4 miles, so I appreciate the clarification. But when I look at how plenty of college teams get their best results after about a month of their seasons when their workouts are primarily 3k pace or faster (e.g. 800s on 400 rest), and you say that this kind of work gets improvement for maybe 4 weeks before stagnation and injury, whereas doing more 10k pace workouts brings longer-term improvement and health, that explains those results.