This sequence of exercises reinforces ideas that have already been introduced in the previous instructed series for the rear chain of muscles like the calf muscles, hamstrings, back etc. It is recommended to start on the musical series only once you have practised the instructed series over several months, so you already have internal awareness of alignment. This sequence conditions the posterior chain of muscles. So if you are looking to balance your muscle strength, this is good for you. We tend to concentrate on our anterior chain of muscles and we often forget the entire chain of muscles at the back.