We must also consider the safety factors
1. Along with creating a situation for ‘new’ responses to occur,
any guidelines must also consider the safety factor.
This is helped by being able to distinguish characteristics
between say Bhujaṅgāsana and Paścimatānāsana.
Thus an elementary knowledge of what happens
in the body is required, along with consideration
of prerequisites and appropriate Pratikriyāsana.