Okay, so how is this any different than normal endurance training?
The Twenties are good because they’re a simple, measurable goal. If you’re working on learning a seven ball cascade, getting long, clean runs of patterns with five and six that incorporate 7 height throws will help you in that endeavor. In your daily training, you might noodle with a few different tricks, then move on. The fact that this drill forces you to achieve a given number of cycles before moving on makes you more honest about your training.
If you’re rehearsing a routine for the stage, the Twenties are a great way to make sure that your material is rock solid. Many people practice routines just by running through their act and giving the most time and attention to their finale trick. Some of these performers drop in the “easy” parts of their routine on stage and wonder why. By addressing each and every trick in a routine with this drill, you get a much more realistic view of how clean you’ll be on stage.
So, yes. This is “just” an endurance technique – but it’s a framework that I’ve had a lot of success with. (It’s also pretty similar to how I learned my act for Soleil!) I hope you find it useful!
An important footnote:
I’m absolutely not saying that this is the single greatest juggling drill of all time.
In fact, these days, I use this as a “filler” training method when I’m not feeling inspired or motivated. Do the drills, let the results be the results, and move on with your day. It combines siteswap training with endurance, so it’s a good way to have a varied practice without thinking too hard and ensure you won’t be slipping backwards by taking a day off.