I wonder if the OP’s disconnect is as simple as 90rpm=180bpm
A long time ago there was a podcast called Podrunner by one DJ Steve Boy (Boyette?) that had a large collection of techno music mixes at any BPM you want. It was a podcast, then an app. They had an intervals version too, that had a 5k, 8k, and 10k program that would build tempo and length of intervals week to week until flat running. I lost track of it and the app stopped working. I wonder…
Its still active, now in Apple Podcasts. Yes! I need this. 300+ mixes with some recovery and interval mixes. Really needs an index!
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Genesis 49:16-17