THE FOUNDATION OF ARNIS— Practice in arnis can improve the hand-eye coordination of any martial artist: but most of all, these simple training exercises can communicate the subtle Idea
of “flow.”
Excerpt: 
“One of the unique characteristics that sets arnis apart from other martial arts is the fact it was developed to fit a person’s natural movement, rather than reprograming a person’s natural movement to fit the art. in arIis, a trained practitioner’s movement is ail so natural, so fluid, he never has to stop and think about what to do in any given situation, it just flows together in a series of block-and-slash techniques.
Although arnis is best known for its characteristic rattan sticks and native broadswords, it is a complete fighting system featuring both weapons and empty-hand combat. With or without weapons, the training principles of arnis are the same. A weapon simply becomes an extension of the hand, moving in the same circular motions as if the fighter were unarmed.”
“The Foundation of Arnis”, by Jim Coleman Black Belt May 1982 Vol 20 No 5.