What deduction would occur if a gymnast performs a step out after a backward roll during a back extension roll at Level 4?

A deduction of 0.40 is appropriate when a gymnast steps out after a backward roll during a back extension roll at Level 4. This deduction reflects a significant loss of control and stability in the execution of the skill.

In gymnastics, a step out indicates that the gymnast did not maintain the proper body alignment and technique required for seamless transitions between elements. When performing a back extension roll, the expectation is for the gymnast to return to their feet in a controlled manner. A step out not only demonstrates a lack of precision but may also disrupt the overall flow of the routine, warranting a higher deduction.

The 0.40 deduction is applied in this context to emphasize the importance of maintaining control and proper execution of skills in gymnastics, especially at competitive levels.