Notes:

1. The idea for number 20 came from Virgil Donati. Virgil plays many exercises where the left side of the body (left foot & left hand) plays something entirely independent from his right side. Number 20 was the first exercise I wrote that utilizes the right-side vs left-side concept. In the first measure, the right side is playing 8th notes (right hand downbeat, right foot upbeat) and the left side is playing 16ths (left hand 8ths, left foot "e" and "ah"). The second measure switches the sides.
2. For number 21 play paradiddles with the hands while the feet changes time, first up and then down.
   
   

Exercises