I got to know the Total Immersion freestyle accidentally. It is amazing! How can they swim such easy and comfortable?
The total immersion was created by American Terry Laughlin after hard research, practice and experience. The big difference with normal freestyle is that it doesn't emphasize the strength and arms' stroke frequency to against water, it speeds up by decrease body's resistance to the water during swimmer each stroke. It makes swimmers swim relaxed, comfortable, easy, especially in long distance, lets them enjoy it.
Terry's slogan is: Swim Smart, Better… Faster!
Another great master in total immersion is Shinji Takeuchi, Japanese-American. There are some videos on internet to show Shinji Takeuchi and Terry Laughlin swim together in total immersion, wonderful !! 
I would like to learn this way, enjoy the easy feeling.
