Can’t answer your question but will suggest pull w band (no buoy). Basically tying your legs together at the ankles - good for body position.

Yesterday 8.8 mi run easyish 1:24:50, walked 1.8 mi. Today 3550 scm and 2.8 mi walk

500 on 830 (749)
5 x 100 on 2:00 (1:24s, still warming up here)
50 kick
5 x (100 fast, 50 kick) 1:22, 21, 21, 21, 20
2 x (200 easy, 50 kick) 306, 301
5 x (100 fast, 50 kick) 1:21, 21, 20, 20, 21
2 x (200 easy, 50 kick) 303, 301

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maybe she's born with it, maybe it's chlorine
If you're injured and need some sympathy, PM me and I'm very happy to write back.
disclaimer: PhD not MD