The study was a cross-sectional research divided into five tests; swimming 200 m (where of at least 50 m should be swum on the back), the ability to jump into deep water, floating, rolling over and directional change.
Rannsóknin var þversniðsrannsókn sem skiptist upp í fimm mælingar; 200 m sund (þar af 50 m á bakinu), að stökkva út í djúpt vatn, flot, velta og stefnubreytingar.