Skills gymnasts eventually stopped performing

Sometimes gymnasts performed a skill for several year and then ... the skill suddenly disappears from their routines! Why?
Top 10 of skills gymnasts eventually stopped performing

Music: Believer - Silent Partner
Idea inspired by sporteverywhere

rhythmicgymnastics,DinaAverina,ArinaAverina,KatsiarynaHalkina,NevianaVladinova,AleksandraSoldatova,AlexandraAgiurgiuculese,