Here's a very efficient road car (bear with us here this is about swimming):
Now here's the thing, the fuel efficiency of this performance machine is a completely lousy 7mpg (33L/100km). Yes that's nearly 10 times worse than our VW Polo (and the car is less than half the weight)!
Ferrari haven't wasted any efficiency - just like an elite swimmer, the drag of this car is as low as it can be to get the job done.
And the clever engineers at Ferrari could easily make this car more efficient but the result is that it would immediately be slower. It would be less effective at covering ground quickly.
Unfortunately the nature of aerodynamics and hydrodynamics means that the easiest way to be more efficient is to just go slowly. So the danger with chasing efficiency to the nth degree if that we just end up being slow.
We're not suggesting thrashing around like a mad thing and wasting energy unnecessarily. Instead we're looking to develop an effective stroke working with the water to move you forwards quickly over longer distances.
Want to be fast? Try EFFECTIVE...