Here's something that puzzles me, I am ALOT slower with a pullbuoy, I would say around 15s per 100 scm. And I have a fairly weak kick. I'm not a fast swimmer by any means and still getting faster every session but the only thing I can come up with is that the buoy is too small and my legs are still sinking causing too much drag. Are 2 buoy's the answer? Or am I missing something. I've mostly stopped using them because it's hard for me to concentrate on the pull when there's an instant break going on, whereas in the past I really felt like it helped to isolate that feeling.