a fun stroke efficiency test
We all know that we should anchor the hand/forearm somewhere in the water and try to leave it there while the body propels itself forward. This would be 100% stroke efficiency. But in reality there's always some slippage of the hand/forearm.
Curious to see how it feels to be (nearly) 100% efficient? Or really anchor the hand somewhere and don't have it slip while you travel forward? In backstroke, with some practice, while swimming you can anchor the fingertips on the rope and continue swimming without disrupting the stroke. I tried today for fun and it was really amazing :) I realized how much my hands slip while swimming normally.
Give it a try,