Your comment, Marco, reminds me of the ichi-bioshi principle. We can find it in karate-do, kendo, but I'd say in budo in general. It means one breath / one heartbeat, meaning how a practicioner should move. This is another example of how the way of the warrior is essentially linked to haiku through zen and its constant practice.
RE: Mizu No Oto- Every Image Has Its Haiku - Edition #43 (English)