Swimming as training?

[trainings]

I have heard recently that some top players have been using swimming as part of their training.

Do any top players have any tips for me or more details of the type of swimming I should be doing?

Is it best to swim with your boat?
Why would you train during part of a game?

[uncool...]

swimming during the game's not generally accepted as cool, ask the Italian men's No7.....

[andylo]

i have to agree with the other guy, swimming is far from cool, as Mr Berryman from kingston kayak club showed at the hull international, swimming twice :)