What is the meaning of 流し when talking about swordsmanship?


What is the meaning of 流し方 in the following sentence?

> 知ってると思うが、剣は腕力より流し方だぜ、力の。

Since it is opposed to 腕力 (brute force), I suppose it has something to do with
spiritual force. The context is a fight between two samurai. This is where
it's taken from:
[i.imgur.com/Yaz1eQr.jpg](https://i.stack.imgur.com/QIE1S.jpg) Here's my
attempt:

> I think you know, but in swordsmanship, more than brute force, it's the way
> you make it circulate that's important.

Thank you for your help!

