What deduction should be applied if incorrect mats are used during a performance?

When incorrect mats are used during a gymnastics performance, the appropriate deduction is 0.3. This guideline is rooted in ensuring that the safety and performance integrity of the gymnasts are upheld. Using mats that are not suitable for the routine can significantly affect both the performance quality and the risk of injury.

If the mats are deemed unsuitable, a deduction reflects the seriousness of this issue while allowing the gymnast to still compete. The 0.3 deduction serves as a balanced penalty, addressing the negative implications of the improper equipment without being overly punitive. It underscores the importance of using the correct apparatus for the safety and fairness of all competitors.