swim faster....
As to advantage and cheating I have just discovered that plastic "frog" webs for the hands are available, to be worn almost as gloves (AliExpress).
At the same time I learned something in an interesting article on technique, ie forget the old rule of keeping fingers together in the arm stroke. It seems that competition swimmers know about this - a slight parting of the fingers in fact allows the water between to create its own "web" and thus an overall better race speed is achievable.
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