hey guys,

i have a question regarding periodic quick strumming, i somewhat understand the concept, however, it'd be nice if i could get a more in-depth lesson on how it is done and how it can be practiced

and by periodic quick strumming.. an example would be:


at certain times you will hear the guy strum fairly quickly
i.e 1:34 / 1:37 / 2:23 / 2:26

could the answer be just to practice a lot to loosen up the wrist?