What it is
In Dragon Ball, the Kaioken is Goku’s technique for multiplying his power for a short while, at a cost. As a personal practice, it’s a ritual of maximum effort: a deliberate, physical way to switch everything on for a few seconds.
How it shows up for me
It sits on top of my deep breathing. The breathing is the base. The Kaioken is the extra activation for the moment when this is really about to get serious.
In front of a heavy bar, I breathe, open my stance wide, spread my arms like Goku, close my fist against my bicep, and squeeze my whole body. Then I lift. It sounds ridiculous written down. It works for me, and none of it has been measured. It’s mine.