Eric,
I have not heard of this .. but now I am gonna have to look into it. ha (im a swimmer)
To the OP, there are some good points on this thread and some really non-useful ones. (But its nice people want to help)
Before you even decide to start swimming, it is most effective to look at what you actually bring to the water and how you "relate" to it physiologically. (meaning, your swimsuit, goggles and body. IE no floaty shorts or pull buoys etc)
There are two natural (unchangeable) factors that influence how to be the most efficient swimmer you can be. IE reaching your potential. Those two factors are COM (where you carry weight) and Density (ability to float or not). I have spoken about this before on this forum.
The two extremes are "floaters" or high COM and LOW density
and "sinkers" low COM and HIGH density.
Floaters have more options to reach potential and can chose, based on other natural factors to be DPS oriented or more TEMPO or turnover oriented.
Sinkers almost universally need to be Tempo focused. For obvious reasons.
A quick test is to keep your lungs filled with air and as horizontal to the surface as you can be. Then let yourself go. Maybe get someone to help. Check out how quickly you sink and how far your feet go down (angle from chin to ankle from surface) if you sink quickly and your feet are way below the surface, youre a sinker. And you can extrapolate from there up to being a floater. Youll need to do this test several time to get a more complete view bc even tho I called it simple.. its quite hard to let oneself go in the water.
Good luck
daved
http://www.theundergroundcoach.com