I don’t know how they were thinking of it, but theoretically you can put any action into an Anki card:
do a problem from chapter 1.5 of the linear algebra textbook
play through X specific piano piece
do five pushups
(though I doubt that the spaced repetition algorithm will really help with that last one)
I can further imagine that a skill which operates largely on muscle memory, like a martial art, could be done similar. “Do five kicks” could help you get the muscle memory behind that specific kick into your head, as long as you can be an accurate judge of how well you performed the kick.
I don’t know how they were thinking of it, but theoretically you can put any action into an Anki card:
do a problem from chapter 1.5 of the linear algebra textbook
play through X specific piano piece
do five pushups
(though I doubt that the spaced repetition algorithm will really help with that last one)
I can further imagine that a skill which operates largely on muscle memory, like a martial art, could be done similar. “Do five kicks” could help you get the muscle memory behind that specific kick into your head, as long as you can be an accurate judge of how well you performed the kick.