Why is a vault in gymnastics a closed skill?

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Tags

1. #decides
2. #these
3. #decision
4. #paced
5. #closed
6. #environmental
7. #externally
8. #towards
9. #continuum
10. #execute
11. #skills
12. #include
13. #gymnastics
14. #athletics
15. #reaction
16. #performer
17. #javelin
18. #skill
19. #controlled
20. #throwing
21. #environment
22. #vaulting