A dance notation system is usually regarded as a representation tool rather than a creative tool. This paper uses the indeterminacy approach as a creativity method to assist body-based limb exercise and development. The movement notation system is constructed based on the effort action from Laban Movement Analysis. In-depth interviews provide a comprehensive insight into the choreographer's perspective. The findings show that the notation system and body-based improvisation training are not mutually exclusive. Therefore, the use of a notation system gives dancers a better understanding of how movements interact with various stimuli, in relation to internal and external environments.