Hey Distance people: 1500/1650 prep

I'm curious what my fellow slow twitchers do to train for the longest pool events. Of particular interest is input from those of you who also swam as a youth. With way less yardage that you used to do, what can be done to be able to survive a decent mile? In my case, workouts are limited to an hour and there are usually 3+ per lane, so sets can't be dedicated just to my interests. However, the coaches are quite willing to do what they can for me. I had a really unpleasant weekend where I raced a 1500 on Friday. I faded a bit and the struggle trying to maintain pace really drained me. In fact, I was really stiff and sore the next day (mainly my lats). I had to kill myself in the 800 on Sat. just to match my 800 split from the previous day. I was still stiff on Sunday. Monday night, I finally felt recovered from that 1500. Coach had us do a 500 right after warmup. Since I was feeling pretty good, I pushed it, hard. My time in that practice 500 converts to a 400 SCM 5 seconds faster than what I did in the meet on Sunday. I don't know if that's encouraging or depressing. :lmao: