cmburch
Contributor
I am one human that can empirically test my different fins. Just as I know that my road bike is faster than my mountain bike. I know I can go 10 miles on the street faster and with less fatigue with my road bike. I know that I can kick a 100 yards underwater faster and with less fatigue with my new split fins compared to my Rocket or Mares paddle fins. I can measure my own speed and fatigue. I use the word empirical to mean by experiment versus by theory.